CN101158178A - A long-span braided reticulated shell structure - Google Patents

Abstract

The invention relates to a braided reticulated shell structure with cross-segment long rods, and relates to a reticulated shell construction technology of a braided node connection structure. The present invention consists of two intersecting bar connection nodes consisting of two-way node clamps, and at least one same-direction bar clamp is arranged between every two two-way node clamps. The present invention adopts the above structure to obtain different combined rigidity of rods and connection stiffness of joints by tightening the bolts before and after the elastic bending of the reticulated shell rods, and the range of stiffness can be adjusted by adjusting the core rod and casing of the composite fixture. According to the height of the reticulated shell, the alignment position of the pin hole of the combination fixture can be determined according to the layer height of the reticulated shell required by the design, and the looseness and tightness of the fixture can be used to allow or prohibit the combination of components Mutual and their sliding between nodes, so as to complete the stiffness conversion of the components in the construction stage and the bearing stage, and the structure is simple.

Description

A long-span braided reticulated shell structure

technical field

The invention relates to a reticulated shell construction technology of a braided node connection structure.

Background technique

The reticulated shell structure is widely used in construction engineering. It is a fairly mature space structure system. Its construction method is usually that short straight bars are connected by welded joints or bolted ball joints. This characteristic of standardized component operations is facing Its advantages will be lost when the reticulated shell type has a relatively high degree of spatial form complexity. On the premise that the spatial design of a large number of ecological buildings emphasizes the building form of free organisms, the probability of using standard reticulated shells such as Kewitt type is decreasing, and in most cases the non-standard spherical joints or welded joints The design and construction are very difficult. For some complex reticulated shells, ordinary grid construction companies are even unable to complete the spatial positioning and construction and installation; while the reticulated shells with braided nodes can overcome the above shortcomings. It is located on the base plane. A plurality of full-length rods paved on the ground are formed into a criss-cross plane grid, and the rods are not interrupted at the intersection, that is, braided joints are used instead of welded or bolted ball joints of traditional reticulated shells. The construction process is to use construction equipment The load-bearing reticulated shell of the preset shape can be obtained by lifting and bending the plane grid into a spatial reticulated shell shape and then constraining the boundary points around the structure. The common complex node construction work of ordinary reticulated shell structures can be avoided, so the braided nodes Reticulated shells are especially suitable for non-standard spatial forms of reticulated shells. However, in the actual construction process of woven reticulated shell structures, the requirements for structural stiffness in the jacking forming stage and the bearing stage are almost contradictory. In the jacking forming stage, that is, the construction stage , it is hoped that the stiffness of the rods and joints is relatively soft to facilitate elastic bending deformation, and it is expected that the stiffness of the rods of the reticulated shell should be as large as possible after the jacking and forming enters the load-bearing stage, but the existing braided reticulated shell construction technology , the stiffness of the rods is fixed in the two stages, which cannot solve the above contradictions well. Since the stiffness of the rods is not adjustable in different stages, it limits the adaptability of the braided reticulated shell with long rods across sections, and cannot meet the actual requirements. The flexible needs of architectural space for different spans and height-span ratios.

Contents of the invention

In order to overcome the shortcomings of insufficient rigidity adaptability of the existing cross-section long-rod braided reticulated shells when they are applied to actual projects, the present invention provides a cross-section long-rod braided reticulated shell structure, which can easily adjust the elastic bending network The stiffness of the rods and nodes of the shell increases the stiffness value of the structure during the construction phase, so that the structure has different stiffness during the construction and load-bearing phases.

The present invention adopts following technical scheme:

Two intersecting bar connection nodes are formed by two-way node clamps, and at least one same-direction bar clamp is arranged between every two two-way node clamps.

The above-mentioned two-way node fixture includes an upper chord layer node fixture and a lower chord layer node fixture, and the upper chord layer node fixture includes a first upper chord layer movable splint, a second upper chord layer movable splint, and an upper chord layer fixed splint; the second upper chord layer movable splint is arranged on the upper chord layer Between the fixed splint of the first upper chord layer and the movable splint of the first upper chord layer, the upper chord longitudinal rod is clamped between the movable splint of the first upper chord layer and the movable splint of the second upper chord layer, and the upper chord is clamped between the movable splint of the second upper chord layer and the fixed splint of the upper chord layer Cross bar; the movable plywood of the first upper chord layer and the movable splint of the second upper chord layer are respectively provided with several upper chord through holes that match each other, and each upper chord through hole is pierced with an upper chord screw, and the upper end of the upper chord screw is threaded to connect the upper chord nut. The lower end is rigidly connected to the upper chord fixed splint; the lower chord node fixture includes the first lower chord movable splint, the second lower chord movable splint, and the lower chord fixed splint; the second lower chord movable splint is set on the first lower chord movable splint Between the splint and the fixed splint of the lower chord layer, the lower chord cross bar is clamped between the first lower chord layer movable splint and the second lower chord layer movable splint, and the lower chord longitudinal rod is clamped between the second lower chord layer movable splint and the lower chord layer fixed splint; The movable plywood of the first lower chord layer and the movable splint of the second lower chord layer are respectively provided with a plurality of lower chord through holes matching each other, and each lower chord through hole is provided with a lower chord screw, and the lower end of the lower chord screw is threadedly connected with the lower chord nut, and the upper end is connected with the lower chord nut. The fixed splint of the lower chord layer is rigidly connected; the lower end of the upper chord layer node fixture is provided with several upper chord layer pin hole core rods, and the pin hole core rods are rigidly connected with the upper chord layer fixed splint. The number of lower chord layer pin hole sleeves corresponding to the number of rods, the pin hole sleeves are rigidly connected with the lower chord layer fixed splint, the inner diameter of the lower chord layer pin hole sleeves is equal to the outer diameter of the upper chord layer pin hole core rod, the upper chord layer The node fixture and the lower chord layer node fixture are connected through the cooperation between the upper chord layer pin hole core rod and the lower chord layer pin hole sleeve.

Each of the upper chord pin hole mandrels and lower chord pin hole sleeves is respectively provided with a plurality of bidirectional node clamp pin holes at different positions, and bidirectional node clamp pins matching their diameters are inserted in the bidirectional node clamp pin holes. A first upper chord rubber cushion layer is respectively arranged between the upper chord cross bar and the first upper chord movable splint and the second upper chord movable splint, and the second upper chord longitudinal bar is respectively arranged between the second upper chord movable splint and the upper chord fixed splint. Upper chord rubber cushion; the first lower chord rubber cushion is respectively set between the above lower chord cross bar and the first lower chord movable splint, and the second lower chord movable splint, and the lower chord longitudinal rod is fixed to the second lower chord movable splint and the lower chord The second lower chord rubber pads are respectively arranged between the splints.

The above-mentioned rod clamps in the same direction include upper limb rod clamps and lower limb rod clamps. The upper limb rod clamps include upper limb movable splints and upper limb fixed splints; Several upper limb through holes are arranged on the movable splint of the upper limb, and upper limb screw rods are placed on each upper limb through hole, the upper end of the upper limb screw rod is threadedly connected to the upper limb nut, and the lower end is rigidly connected with the upper limb fixed splint; the lower limb rod fixture includes Lower limb movable splint, lower limb fixed splint; the lower limb longitudinal rod or lower string horizontal rod is clamped between the lower limb movable splint and the lower limb fixed splint; several lower limb through holes are set on the lower limb movable splint, and each lower limb through hole is pierced with a lower limb Screw, the lower end of the lower extremity screw is threaded to the lower extremity nut, and the upper end is rigidly connected to the lower extremity splint; the upper extremity rod clamp is provided with several upper extremity pin hole core rods at the end close to the lower extremity rod clamp, and the pin hole core rod is rigidly connected to the upper extremity splint , the end of the above-mentioned lower limb rod fixture close to the upper limb rod fixture is provided with lower limb pin hole sleeves corresponding to the number of upper limb pin hole core rods, the pin hole sleeves are rigidly connected with the lower limb fixed splint, and the inner diameter of the lower limb pin hole sleeves is The outer diameter of the above-mentioned upper limb pin-hole core rod is equal, and the above-mentioned upper limb rod clamp and lower limb rod clamp are connected through the upper limb pin-hole core rod and the lower limb pin-hole sleeve.

Each of the pinhole core rods of the upper limbs and the pinhole sleeves of the lower limbs are respectively provided with a plurality of pinholes of the same-direction rod fixtures at different positions, and the same-direction rods matching their diameters are inserted on the pinholes of the same-direction rod fixtures Clamp pins. Upper limb rubber cushions are arranged between the above-mentioned upper chord longitudinal bar or upper chord crossbar and upper limb movable splint and upper limb fixed splint;

The present invention adopts the above structure, uses the upper and lower chord composite rods as the long rods in the vertical and horizontal directions of the long rod braided reticulated shell, and the combination method of the combined rods in each direction is based on the principle of realizing the combination of components by shearing connection similar to composite beam components. However, the shear connectors used in the combined upper and lower chord members in the combined member are in the form of the above-mentioned same-direction member clamps, rather than the shear studs in the combined beam, in which the upper and lower limb member clamps are attached by The movable splint and the fixed splint of the rubber pad are formed. The opening of the movable splint is passed through by the screw rod just connected to the fixed splint. By tightening the nuts, the horizontal bar or longitudinal bar of the upper and lower chords can be clamped by the splint, and the upper and lower chords pass through. The pin-hole mandrels and the pin-hole sleeves on the bottom surface of the respective fixing splints are connected in a pin-hole plug-in manner to form a composite fixture. During the elastic bending process of the structure construction stage, the nuts of the fixtures are not tightened, that is, the fixtures remain in an unclamped state, and the rods can slide freely in the fixtures. At this time, the upper and lower chords are before the shear connection becomes effective. In the combined state, although the two rods are bent at the same time, they belong to independent bending resistance rather than combined bending resistance, so they are equivalent to the uncombined components of the double rods; when the structure is in the loading stage after elastic bending in place, the nuts of the upper and lower limb clamps Tighten all the rods and the clamps are no longer allowed to slip, then the composite clamps will become effective as shear connectors, and the upper and lower limbs will form an effective combined component to resist bending together, and its bending stiffness will be greater than that before the nuts are tightened When the upper and lower extremity clamps are aligned and combined through the pin holes of the core rod and the casing, the appropriate alignment pin holes can be selected according to the stiffness multiple required to be increased in the loading stage compared with the construction stage to form a composite member. When the combined member completes the pin-hole alignment combination according to the smaller upper and lower rod spacing, the stiffness increase after the nut is tightened is small compared to before tightening; and when the upper and lower rod spacing of the combined member is large, the nut is tightened. Compared with before tightening, the multiplier of rigidity increase is also rapidly enlarged. The rubber pads attached to the splints in the upper and lower extremity clamps can not only adapt to the cross-sectional shapes of various rods and increase the friction force of clamping, but also play a role of bolt spring washer to a certain extent.

The composite rods will form a reticulated shell braided node at the intersection of the vertical and horizontal directions. The shear connectors of the original upper and lower extremity composite rods will be converted into joint fixtures of double-layer reticulated shells at this node, but the basic working principle remains the same. , but the upper and lower extremity fixtures each add a movable splint for the long rods in the intersecting direction of the reticulated shell to pass through the fixture. Intersecting long rods, lower limb rod fixtures evolved into reticulated shell lower chord layer node fixtures to clamp the bottom intersecting long rods in both vertical and horizontal directions, but the combination of core rods and casings of the upper and lower node fixtures remains unchanged, that is, each core rod and casing They are inserted into each other and locked according to the alignment position of the pin hole, and the locked core rod and casing are equivalent to the web rods of the structure.

Compared with the prior art, the beneficial effect of the present invention is that: before and after elastic bending of reticulated shell rods, different combination stiffness of rods and node connection stiffness can be obtained by tightening bolts, and the range of stiffness can be adjusted by adjusting The alignment position of the core rod and the pin hole on the casing of the composite fixture can be changed by changing the height of the web of the reticulated shell, and the pin hole alignment position of the composite fixture can be determined according to the layer height of the reticulated shell required by the design. Loose and tight to allow or forbid the sliding between the combined components and their joints, so as to complete the stiffness conversion of the components in the construction phase and the bearing phase, and the structure is simple.

Description of drawings

Figure 1 is a schematic diagram of the jacking and bending construction method of a single-layer span-span long-rod braided reticulated shell.

Fig. 2 is a schematic diagram of the principle of a composite member with adjustable bending stiffness realized by using a shear connector.

Fig. 3 is the clip-type shear connector used for combining the same-direction double-leg rods in the present invention.

Fig. 4 is a three-dimensional structure schematic diagram of the upper limb rod clamp used for combining the same direction rod according to the present invention.

Fig. 5 is a three-dimensional structure schematic diagram of the lower limb rod clamp used for combining the same direction rods according to the present invention.

Fig. 6 is a three-dimensional structural view of the combination of Fig. 4 and Fig. 5 into a same-direction bar clamp.

Fig. 7 is a schematic diagram of a braided grid formed by vertical and horizontal intersecting combined rods of the present invention.

Fig. 8 is a three-dimensional structural view of the two-way node fixture at the vertical and horizontal intersection of the combined rods.

Fig. 9 is a three-dimensional view of a two-way node clamp and three adjacent co-directional rod clamp connectors of the braided reticulated shell in the present invention.

Fig. 10 is a schematic diagram of the working state when the combined long rods in the reticulated shell are bent in place and the clamp bolts are tightened.

Detailed ways

The present invention consists of two intersecting bar connection nodes consisting of two-way node clamps, and at least one same-direction bar clamp is arranged between every two two-way node clamps.

Above-mentioned two-way node fixture comprises upper chord layer node fixture 3, lower chord layer node fixture 4, and described upper chord layer node fixture 3 comprises first upper chord layer movable splint 31, second upper chord layer movable splint 32, upper chord layer fixed splint 33; The first upper chord movable splint 32 is arranged between the upper chord layer fixed splint 33 and the first upper chord layer movable splint 31, and the upper chord longitudinal bar 34 is clamped between the first upper chord layer movable splint 31 and the second upper chord layer movable splint 32. The upper chord crossbar (35) is clamped between the movable splint 32 and the upper chord layer fixed splint 33; several upper chord through holes 36 that match each other are respectively set on the first upper chord layer movable splint 31 and the second upper chord layer movable splint 32. Each upper chord through hole 36 is provided with an upper chord screw 37, the upper end of the upper chord screw 37 is threadedly connected to the upper chord nut 38, and the lower end is rigidly connected with the upper chord fixed splint 33; the lower chord node clamp 4 includes a first lower chord movable splint 41 , the second lower string layer movable splint 42, lower string layer fixed splint 43; the second lower string layer movable splint 42 is arranged between the first lower string layer movable splint 41 and the lower string layer fixed splint 43, the first lower string layer movable splint 41 and the lower string layer movable splint 43 The lower chord cross bar 45 is clamped between the second lower chord movable splint 42, and the lower chord longitudinal rod 44 is clamped between the second lower chord movable splint 42 and the lower chord fixed splint 43; the first lower chord movable splint 41, the second lower chord A number of lower chord through holes 46 that match each other are respectively arranged on the movable splint 42 of the first layer, and a lower chord screw 47 is placed on each lower chord through hole 46, and the lower end of the lower chord screw 47 is threaded to connect the lower chord nut 48, and the upper end and the lower chord layer are fixed to the splint 43 Rigid connection; the lower end of the above-mentioned upper chord layer node fixture 3 is provided with several upper chord layer pin hole mandrels 39, and the pin hole mandrel 39 is rigidly connected with the upper chord layer fixed splint 33, and the upper end of the above-mentioned lower chord layer node fixture 4 is set with the upper chord layer pin hole The number of core rods 39 corresponds to the number of lower chord layer pin hole sleeves 49, and the pin hole sleeves 49 are rigidly connected with the lower chord layer fixed splint 43. The outer diameters are equal, and the upper chord layer node fixture 3 and the lower chord layer node fixture 4 are connected through the upper chord layer pinhole core rod 39 and the lower chord layer pinhole sleeve 49 .

Each of the upper chord layer pin hole core rod 39 and the lower chord layer pin hole sleeve 49 are respectively provided with a plurality of bidirectional node clamp pin holes 391 at different positions, and bidirectional node clamp pin holes 391 that match the diameter of the bidirectional node clamp are placed on the pin hole 391. Fixture pin 392 . A first upper chord rubber pad 341 is arranged between the above-mentioned upper chord cross bar 34, the first upper chord movable splint 31, and the second upper chord movable splint 32, and the upper chord longitudinal bar 35 is connected to the second upper chord movable splint 32 and the upper chord fixed splint. 33, the second upper chord rubber pad 351 is set respectively; the first lower chord rubber cushion 441 is respectively set between the above-mentioned lower chord cross bar 45, the first lower chord movable splint 41, and the second lower chord movable splint 42, and the lower chord vertical A second lower chord rubber pad 451 is respectively arranged between the rod 44 and the second lower chord movable splint 42 and the lower chord fixed splint 43 .

The rod clamps in the same direction include an upper limb rod clamp 1 and a lower limb rod clamp 2. The upper limb rod clamp 1 includes an upper limb movable splint 11 and an upper limb fixed splint 13; Upper chord longitudinal bar 34 or upper chord cross bar 35; upper limb movable splint 11 is provided with several upper limb through holes 16, upper limb screw rod 17 is perforated on each upper limb through hole 16, and the upper end of upper limb screw rod 17 is threadedly connected with upper limb nut 18, The lower end is rigidly connected to the upper limb fixed splint 13; the lower limb rod fixture 2 includes a lower limb movable splint 21 and a lower limb fixed splint 23; the lower limb movable splint 21 and the lower limb fixed splint 23 clamp the lower string longitudinal bar 44 or the lower string cross bar 45; Several lower limb through-holes 26 are set on the movable splint 21 of the lower limb, and a lower limb screw 27 is placed on each of the lower limb through-holes 26, the lower end of the lower limb screw 27 is threadedly connected with the lower limb nut 28, and the upper end is rigidly connected with the lower limb fixed splint 23; A plurality of upper limb pin hole mandrels 19 are arranged on the end of the upper limb rod fixture 1 close to the lower limb rod fixture 2, and the pin hole core rods 19 are rigidly connected with the upper limb fixing splint 13, and the lower limb rod fixture 2 is near the end of the upper limb rod fixture 1 The lower limb pinhole casing 29 corresponding to the number of upper limb pinhole core rods 19 is set, the pinhole casing (29) is rigidly connected with the lower limb fixed splint 13, and the inner diameter of the lower limb pinhole casing 29 is the same as the upper limb pinhole core. The outer diameters of the rods 19 are equal, and the upper limb rod clamp 1 and the lower limb rod clamp 2 are connected through the upper limb pin hole mandrel 19 and the lower limb pin hole sleeve 29 .

Each of the above-mentioned upper limb pin hole core rods 19 and lower limb pin hole sleeves 29 are respectively provided with a plurality of codirectional rod clamp pin holes 191 in different positions, and the codirectional rod clamp pin holes 191 are pierced with a diameter matching The same direction bar clamp pin 192. An upper limb rubber cushion 141 is arranged between the above-mentioned upper chord longitudinal bar 34 or upper chord cross bar 35 and upper limb movable splint 11 and upper limb fixed splint 13 respectively; Lower limb rubber pads 241 are arranged respectively between them.

Figure 1 is the construction process of a single-layer braided reticulated shell. It can be seen from the figure that the joints are not the common welding or ball joint connection to splice the short rods, but the long or extended rods are staggered into a plane The grid, the edited planar grid is lifted to the desired shape of the reticulated shell as a whole, and the reticulated shell can bear the load after the four sides are constrained.

Fig. 2 is a conceptual schematic diagram of the basic principle followed by the embodiment shown in Fig. 6. The combination of the upper chord member and the lower chord member before bending and during the bending forming process is an ineffective combination state, and each independently resists bending. The connection between them can be regarded as a virtual connection from the perspective of shear connection; only when the bending is in place and used as a load-bearing structure can the upper chord member and the lower chord member be constructed as a real composite member to jointly resist bending. Shear links really work.

Fig. 3 is a schematic diagram of the same-direction double-limb rods equipped with clamp-type shear connectors. The upper and lower limb clamps are respectively connected by upper limb pin-hole core rods (19) and lower limb pin-hole sleeves (29) to form composite fixtures. Arranged evenly along the rods, the upper limb rods and lower limb rods are respectively clamped in the corresponding splints of the upper and lower limb fixtures. Whether the shear connection is effective or not can be determined by whether the nuts are tightened.

Fig. 4 is the upper limb rod clamp of the same direction rod clamp of the present invention, as can be seen from the figure, the fixed splint 11 of the upper limb rod clamp is rigidly connected with four upper limb screw rods 37 and four upper limb pin hole core rods 39, Four upper limb screw rods 37 pass through the through hole 36 of the movable splint, and the upper limb nut 38 on the upper limb screw rod 37 can limit the range of displacement of the movable splint, and after tightening, the upper chord longitudinal rod 34 or upper chord passing between the splint rubber cushions can be made The crossbar 35 is fully fixedly clamped.

Fig. 5 is the lower limb rod clamp of the same direction rod clamp of the present invention, as can be seen from the figure, the fixed splint of the lower limb rod clamp is away from the end of the upper limb rod clamp and rigidly connects four lower limb screw rods 27 passing through the movable splint , the other end is rigidly connected with four lower limb pin hole sleeves 29, and the lower limb pin hole sleeves 29 can be matched and connected with the upper limb pin hole core rod 19 of the upper limb rod fixture.

In Fig. 6, the four upper limb pin-hole core rods 19 of the upper limb clamp of the same-direction rod clamp and the four lower limb pin-hole sleeves 29 of the lower limb clamp are inserted into each other. After the hole 191 is aligned, insert the same-direction rod fixture pin 192 to fix it, and the alignment of the same-direction rod fixture pin hole 191 on the upper limb pin hole core rod 19 and the lower limb pin hole sleeve 29 has multiple positions for selection and adjustment When inserting each other, the alignment and hole selection can be determined according to the expected upper and lower chord layer spacing of the reticulated shell structure, that is, the layer height of the double-layer reticulated shell. The different adjustments of the mating positions between the upper limb pinhole core rod 19 and the lower limb pinhole sleeve 29 are reflected in the structural characteristics, which can adjust the stiffness change range or magnification of the upper and lower limb rods before and after combination.

Fig. 7 shows that before the lifting and bending of the long-span reticulated shell in the present invention, firstly, the upper and lower chord combined long rods are criss-crossed to form a double-layer plane grid.

Figure 8 shows the node implementation mode when the combined rods are woven into a double-layer reticulated shell with cross-segment long rods. The upper limb rod clamps evolve into the upper chord layer node clamps, connecting the upper chord rods, and the fixed splints of the upper chord layer node clamps are far away from the lower chord layer nodes. One end of the fixture is rigidly connected with four upper string screws, and the other end is rigidly connected with four pin-hole mandrels. The four upper string screws pass through the upper string through holes of the two movable splints. The upper string nuts on the upper string screws can limit the displacement range of the movable splint. After being tightened, the upper chord rods passing through the rubber pads on the respective splints can be completely fixed and clamped. The lower extremity bar fixture evolved into the lower chord node fixture, which connects the lower chord. The fixed splint of the lower chord node fixture is far away from the upper chord node fixture. One end is rigidly connected to four screws, and the other end is rigidly connected to four pin-hole sleeves, which are used to connect with the upper chord. The pin-hole core rods of the layer node fixture are mated with each other and fixed with pins. The pin-hole alignment on the pin-hole core rod and the pin-hole sleeve has a variety of positions for selection and adjustment. The expected upper and lower chord spacing, that is, the layer height of the double-layer reticulated shell is determined.

In the basic unit of reticulated shell shown in Figure 9, it includes a two-way node fixture and three rod fixtures in the same direction. Insert the combination of pins and bolts. After the upper chord longitudinal bar, upper chord transverse bar, lower chord longitudinal bar and lower chord transverse bar on each node are respectively arranged in the two-way node fixture and the same direction bar fixture, use the locknut along the corresponding screw rod When the movable splint is loaded, when the whole structure is in the form of a double-layer planar grid before the lifting and bending deformation, the bolts of the splint are not tightened but the displacement range of the movable splint can be limited, so the nodes have a large degree of freedom of movement, allowing During the lifting and bending deformation of the network frame, each member slides in the joints and rod fixtures. Only when the planar network frame is lifted and bent into the designed reticulated shell shape can the splint bolts of each fixture be locked. At this time, the bar is fully restrained and cannot slip at all in each fixture. For some structures with higher load requirements, such as dynamic loads, additional metal spring washers can be added under the nuts and adhesive can be added to the uncompacted splint and rod contact surface during the nut tightening process.

Fig. 10 further illustrates the locking implementation of the shear connection fixture for the braided reticulated shell with spanning long poles in Fig. 9. When the double-layer plane grid is lifted, whether it is the shear connection fixture of the upper and lower chord members or the two-way node fixture , the splint bolts are not locked, only when the double-layer planar grid is lifted and bent to the set shape of the reticulated shell, it is locked, that is, the nuts on the fixture are tightened, and the structure has a real double-layer reticulated shell The structural characteristics of the structure, the bending stiffness will become the enlarged stiffness value after the real combination of the upper and lower chord members.

Claims (7)

1. The cross-section long rod braided reticulated shell structure is characterized in that the connecting nodes of two intersecting rods are composed of two-way node clamps, and at least one same-direction rod clamp is arranged between every two two-way node clamps. 2. The cross-span long bar braided reticulated shell structure according to claim 1, characterized in that the above-mentioned two-way node clamps include upper chord layer node clamps (3) and lower chord layer node clamps (4), and the upper chord layer node clamps ( 3) including the first upper chord layer movable splint (31), the second upper chord layer movable splint (32), the upper chord layer fixed splint (33); the second upper chord layer movable splint (32) is arranged on the upper chord layer fixed splint (33) and Between the first upper string movable splints (31), the upper string vertical rod (34) is clamped between the first upper string movable splints (31) and the second upper string movable splints (32), and the second upper string movable splints (32) ) and the upper chord layer fixed splint (33) to clamp the upper chord cross bar (35); the first upper chord layer movable splint (31) and the second upper chord layer movable splint (32) are respectively provided with several matching upper chord through holes (36), each upper chord through hole (36) is pierced with an upper chord screw (37), the upper end of the upper chord screw (37) is threaded to connect the upper chord nut (38), and the lower end is rigidly connected to the upper chord layer fixed splint (33); The lower string layer node clamp (4) comprises the first lower string layer movable splint (41), the second lower string layer movable splint (42), the lower string layer fixed splint (43); the second lower string layer movable splint (42) is arranged on Between the first lower string movable splint (41) and the lower string fixed splint (43), the lower string cross bar (45) is clamped between the first lower string movable splint (41) and the second lower string movable splint (42). ), clamp the lower chord longitudinal bar (44) between the second lower chord movable splint (42) and the lower chord fixed splint (43); the first lower chord movable splint (41), the second lower chord movable splint (42) A plurality of lower string through holes (46) that match each other are arranged on the top, and a lower string screw (47) is placed on each lower string through hole (46), and the lower end of the lower string screw (47) is threaded to connect the lower string nut (48), and the upper end It is rigidly connected with the lower chord layer fixed splint (43); the lower end of the upper chord layer node fixture (3) is provided with several upper chord layer pin hole core rods (39), and the pin hole core rods (39) are rigidly connected to the upper chord layer fixed splint (33). Connection, the upper end of the above-mentioned lower chord layer node fixture (4) is provided with the lower chord layer pinhole casing (49) corresponding to the number of upper chord layer pinhole core rods (39), and the pinhole layer sleeve (49) and the lower chord layer fixed splint ( 43) Rigid connection, the inner diameter of the lower chord layer pin hole casing (49) is equal to the outer diameter of the upper chord layer pin hole mandrel (39), the upper chord layer node clamp (3) and the lower chord layer node clamp (4) The upper chord layer pin hole mandrel (39) is matched and connected with the lower chord layer pin hole sleeve (49). 3. The span-span long rod braided reticulated shell structure according to claim 2, characterized in that each of the above-mentioned upper chord layer pinhole core rods (39) and lower chord layer pinhole sleeves (49) are respectively provided with a plurality of The two-way node clamp pin holes (391) at different positions, the two-way node clamp pin holes (391) are pierced with a two-way node clamp pin (392) matching its diameter. 4. The long-span braided reticulated shell structure according to claim 2, characterized in that the upper chord cross bar (34) and the first upper chord movable splint (31) and the second upper chord movable splint (32) The first upper chord rubber pad (341) is respectively arranged between the upper chord longitudinal rods (35) and the second upper chord movable splint (32) and the upper chord fixed splint (33) and the second upper chord rubber cushion (351) is respectively arranged. The first lower chord rubber pad (441) and the lower chord longitudinal bar (44) are arranged respectively between the above-mentioned lower chord cross bar (45) and the first lower chord movable splint (41) and the second lower chord movable splint (42). A second lower chord rubber pad (451) is respectively arranged between the second lower chord movable splint (42) and the lower chord fixed splint (43). 5. The cross-segment long rod braided reticulated shell structure according to claim 1, characterized in that the above-mentioned rod clamps in the same direction include upper limb rod clamps (1) and lower limb rod clamps (2), and the upper limb rod The clamp (1) includes an upper limb movable splint (11) and an upper limb fixed splint (13); the upper limb movable splint (11) and the upper limb fixed splint (13) clamp the upper string longitudinal bar (34) or upper string cross bar (35); Several upper limb through-holes (16) are set on the movable splint for upper limb (11), and upper limb screw rod (17) is worn on the described each upper limb through-hole (16), and the upper end of upper limb screw rod (17) is threadedly connected with upper limb nut (18 ), the lower end is rigidly connected with the upper limb fixed splint (13); the lower limb rod fixture (2) includes the lower limb movable splint (21), the lower limb fixed splint (23); the lower limb movable splint (21) and the lower limb fixed splint (23) Clamp the lower chord longitudinal bar (44) or the lower chord cross bar (45) between them; set several lower limb through holes (26) on the movable splint (21) of the lower limbs, and perforate the lower limb through holes (26) on each lower limb Screw rod (27), the lower end of lower limb screw rod (27) is threadedly connected with lower limb nut (28), and the upper end is rigidly connected with lower limb fixing splint (23); A plurality of upper limb pin hole core rods (19), the pin hole core rods (19) are rigidly connected with the upper limb fixing splint (13), and the above-mentioned lower limb rod clamp (2) is arranged near one end of the upper limb rod clamp (1) to be connected with the upper limb pin The lower limb pin-hole casing (29) corresponding to the number of hole core rods (19), the pin-hole casing (29) is rigidly connected with the lower limb fixing splint (13), and the inner diameter of the lower limb pin-hole casing (29) is the same as the above-mentioned The external diameter of upper limb pinhole core rod (19) is equal, and above-mentioned upper limb rod fixture (1) is connected with lower limb pinhole sleeve pipe (29) by upper limb pinhole core rod (19) and lower limb rod fixture (2). 6. The cross-segment long rod braided reticulated shell structure according to claim 5, characterized in that each of the above-mentioned upper limb pinhole core rods (19) and lower limb pinhole sleeves (29) are respectively provided with a plurality of different positions The same-direction rod clamp pin hole (191), the same-direction rod clamp pin hole (191) is pierced with the same-direction rod clamp pin (192) matching its diameter. 7. The cross-segment long rod braided reticulated shell structure according to claim 5, characterized in that the above-mentioned upper string longitudinal rod (34) or upper string cross rod (35) and upper limb movable splint (11) and upper limb fixed splint (13) Upper limb rubber pads (141) are respectively set between them; lower limb rubber pads (241 ).

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