CN107034992B - Ribbed ring type cable dome structure with upper chord rigid ring rod and its construction forming method - Google Patents

Abstract

The invention discloses a rib ring type cable dome structure with upper chord rigid ring rods, which comprises a central strut, ridge cables and oblique cables connected end to end to form several central cable rod units sharing a central strut, peripheral struts, ridge cables and oblique cables The cables are connected end to end to form a number of peripheral cable-strut units. The nodes of the ridge cables and oblique cables of the central cable-strut unit are connected to the tops of the peripheral struts of the peripheral cable-strut units. The tops of the peripheral struts of the adjacent peripheral cable rod units are connected with upper chord rigid ring rods between the tops of the peripheral struts of two adjacent peripheral cable rod units in the same circle, and the construction method of the cable dome structure is also disclosed. The rib ring type cable dome structure and construction method with upper chord rigid ring rods of the present invention can effectively reduce ring beam pressure, cable tension and structural cost due to the upper chord rigid ring rods, and most of the construction steps are on the ground or near the ground Complete, reducing the difficulty of construction, easy to ensure the quality of construction.

Description

Ribbed ring type cable dome structure with upper chord rigid ring rod and its construction forming method

technical field

The invention relates to a cable dome structure and a construction method, in particular to a rib ring type cable dome structure and a construction forming method.

Background technique

The existing rib-ring cable dome structure is composed of ridge cables, oblique cables, ring cables and struts, and the rigidity is provided by the prestressing of the cables. In order to ensure the necessary structural rigidity, the prestress of the cables, especially the outer ring cables, is often Larger, the support generally requires a larger cross-section circumferentially compressed concrete or steel beam to balance the tension of the cable. As far as the construction of the cable dome is concerned, the existing cable dome structure is only composed of flexible cables and It is composed of struts hinged at both ends, and the structural shape has high sensitivity to the internal force of the component. The cables and struts that apply pretension need to form a balanced system with the outermost ring beam to have structural rigidity. Cables and struts alone cannot form a rigid self-balancing system. According to the research on the composition and mechanical characteristics of the existing cable dome structure, it is known that the manufacturing error of the dome components and the prestressing error of the cables have a great impact on its construction. , which is also one of the main bottlenecks restricting the large-scale promotion of cable dome structures.

Contents of the invention

Purpose of the invention: the purpose of the present invention is to address the deficiencies in the prior art, to provide a rib ring type cable dome structure with upper chord rigid ring rod and the construction forming method of the cable dome structure, by improving the existing rib ring type cable dome structure The transformation of the system and its construction forming method can reduce the section and prestress of the cable, reduce the pressure and section of the outermost ring beam, and reduce the influence of the component manufacturing error and the prestress error of the cable on its construction forming, making it The construction is simpler, the construction quality is better, and the construction cost is lower.

Technical solution: A ribbed ring type cable dome structure with top chord rigid ring rods according to the present invention, including central struts, peripheral struts, ridge cables, oblique cables and ring cables, the central struts, ridge cables and oblique cables Connected end to end to form several central cable-rod units sharing a central strut, the ridge cables and oblique cables are divergently connected to the top and bottom of the central strut respectively, and the peripheral struts, ridge cables and oblique cables are connected end-to-end to form a number of peripheral Cable-strut units, the nodes of the ridge cables and oblique cables of each central cable-strut unit are connected to the tops of the peripheral struts of the peripheral cable-strut units, and the nodes of the ridge cables and oblique cables of the peripheral cable-strut units located in the inner ring are connected to the adjacent The tops of the peripheral struts of the peripheral cable-strut units, the tops of the peripheral struts of two adjacent peripheral cable-strut units in the same ring are connected with upper chord rigid ring rods, and the bottoms are connected with ring cables.

The central strut is provided with an adjusting sleeve for adjusting the length.

The sling is provided with an adjustment sleeve for length adjustment.

Lugs and connecting splints extend outward from the surface of the upper chord rigid ring rod. The peripheral struts and oblique cables are hinged to the lugs. The connecting splints are inserted into the ridge cables, and the ridge cables are clamped by adjusting the bolts on the connecting splints. Fixed notochord with upper chord rigid ring rod.

The construction forming method of the rib ring type cable dome structure with the upper chord rigid ring bar comprises the following steps:

1) Assemble the ridge cables, oblique cables, central struts, and innermost upper chord rigid ring rods on the ground to obtain several interconnected central cable rod units sharing a central strut, and then assemble the ridge cables, oblique cables, hoop cables, The peripheral struts and the upper chord rigid ring rods are assembled to obtain several interconnected peripheral cable-strut units. Each ridge cable connecting the top of the central strut and the support is a whole cable. Adjust the bolts on the connecting splint so that the connecting splint clamps the ridge cable , and then fix the ridge cable and the upper chord rigid ring rod, adjust the adjustment sleeve of the center support rod during assembly, so that the length of the center support rod is less than its zero-state design length, and adjust the adjustment sleeve of each ring ring to make the length of each ring ring greater than its zero-state design length, the lengths of peripheral struts, ridge cables, oblique cables and upper chord rigid ring rods are zero-state design lengths;

2) Set tire frames on the ground, each tire frame has a support point of the same height, place the innermost upper chord rigid ring bar assembled in step 1) horizontally on the tire frame, and adjust the adjustment sleeve of the center support rod The central strut is elongated, the ridge cables and oblique cables connected with the central strut are stretched, the ridge cables and oblique cables are under tension, the central strut and the upper chord rigid ring rod are compressed, and the ridge cables, oblique cables, and central struts It forms a self-balancing system together with the innermost upper chord rigid ring rod;

3) Place the second upper chord rigid ring rod adjacent to the innermost upper chord rigid ring rod in step 2) horizontally on the tire frame, and use the tensioning equipment and the adjusting sleeve to tension the inner ring cable, After the tension is completed, the second circle of upper chord rigid ring rods and their internal ridge cables, oblique cables, peripheral struts and central struts form a self-balancing system;

4) When the upper chord rigid ring rods are not less than two turns, place the adjacent outer ring upper chord rigid ring rods of the outermost upper chord rigid ring rods that have formed a self-balancing system horizontally on the tire frame from the inside to the outside. The tensioning device and the adjusting sleeve tension the adjacent inner hoops. After the tension is completed, the upper chord rigid hoop of the hoop and its internal ridges, obliques, peripheral struts and central struts form a self-balancing system;

5) Lift the cable dome structure forming a self-balancing system obtained in step 4) to near the height of the ring beam, fix the joints of the outermost ridge cables and oblique cables with the ring beam support, and use tensioning equipment and adjusting sleeves , tension the outermost ring cable, and the dome structure is formed.

Beneficial effects: the rib-ring type cable dome structure and construction method with upper chord rigid ring rods of the present invention, the upper chord rigid ring rods that can be tensioned and compressed are added to connect the nodes of the ridge cables and struts in the same ring to form a ring, A rib-ring cable dome structure with upper chord rigid ring rods:

(1) The upper chord rigid ring rod can be under tension or compression, and has a relatively large rigidity, which can effectively improve the overall stiffness of the cable dome, thereby reducing the demand for the stiffness provided by the cable dome, reducing the cross-section and Prestressing, because the unit cost of the cable is much higher than that of the rigid steel pipe, it can reduce the total cost of the structure, and at the same time, the reduction of the prestress of the cable can effectively reduce the pressure on the ring beam, thereby reducing the section of the ring beam , reduce the structure's self-weight and total cost;

(2) The reduction of cable prestress can facilitate construction tensioning;

(3) The upper chord rigid ring rod fixes the upper chord rigid ring rod by adjusting a number of high-strength bolts on its connection splint to clamp the ridge cord. This structure and connection method avoids the setting of cable heads at both ends of each ridge cable, saving cost;

(4) Simplify the complex construction and forming method of the existing cable dome structure. Since the upper chord rigid ring rods can be subjected to tension or compression, after the cable is prestressed, the upper chord rigid ring rods of any circle can be combined with the ring rods of this circle. The stay cables and struts in the upper chord rigid ring rod form a self-balancing system, and can also form a self-balancing system with the stay cables, struts and outermost ring beams outside the upper chord rigid ring rod of the circle, because the cable dome of the present invention There are upper chord rigid ring rods connected into a ring, which can be formed by tensioning the ring rope layer by layer from the inside to the outside, and most of the construction tension can be carried out at a lower position from the ground, except for the last step of lifting installation process , the installation or stretching of the rest of the construction steps are completed on or near the ground, without scaffolding, which reduces the construction difficulty and cost, and is easy to ensure the construction quality.

Description of drawings

Fig. 1 is the three-dimensional schematic diagram of step 2) self-balancing part in the construction process of the present invention;

Fig. 2 is the three-dimensional schematic diagram of step 3) self-balancing part in the construction process of the present invention;

Fig. 3 is the three-dimensional schematic diagram of the structure after the construction of the present invention is completed;

Fig. 4 is a schematic diagram of the connecting nodes of the upper chord rigid ring rod and the ridge cables, oblique cables and peripheral struts of the present invention.

Detailed ways

The technical solutions of the present invention will be described in detail below, but the protection scope of the present invention is not limited to the embodiments.

As shown in Figures 1 to 4, a rib ring type cable dome structure with upper chord rigid ring rods of the present invention includes a central strut 1, peripheral struts 2, ridge cables 3, oblique cables 4 and ring cables 5, and the central strut Rod 1, ridge cable 3 and oblique cable 4 are connected end to end to form several central cable-rod units sharing a central strut. The ridge cables 3 and oblique cables 4 are connected end to end to form a number of peripheral cable-rod units. The nodes of the ridge cables 3 and oblique cables 4 of each central cable-rod unit are connected to the top ends of the peripheral struts 2 of the peripheral cable-rod units, and the peripheral cable rods located in the inner ring The nodes of the ridge cable 3 and the oblique cable 4 of the unit are connected to the top of the peripheral strut 2 of the adjacent peripheral cable-strut unit, and the upper chord rigid ring rod is connected between the tops of the peripheral strut 2 of two adjacent peripheral cable-strut units in the same circle 6. There is a ring rope 5 connected between the bottoms. The center support rod 1 is provided with an adjustment sleeve for adjusting the length. The ring rope 5 is provided with an adjustment sleeve for adjusting the length. Ear 7 and connecting splint 8, peripheral strut 2 and oblique cable 4 are hinged with lug 7, connecting splint 8 is inserted into the notochord 3, and the notochord 3 is clamped by adjusting the bolts on the connecting splint 8, thereby fixing the notochord 3 and the upper chord rigid ring pole 6.

The construction forming method of the rib ring type cable dome structure with the upper chord rigid ring bar comprises the following steps:

1) Assemble the ridge cable 3, oblique cable 4, central strut 1 and innermost chord rigid ring rod 6 on the ground to obtain a number of interconnected central cable rod units sharing a central strut 1, and then assemble the ridge cable 3, The oblique cables 4, the ring cables 5, the peripheral struts 2 and the upper chord rigid ring rods 6 are assembled to obtain a number of interconnected peripheral cable rod units, and each ridge cable 3 connecting the top of the central strut 1 and the support is a whole cable. The notochord 3 and the upper chord rigid ring rod 6 are fixedly connected by adjusting the bolts on the connecting splint 8 to clamp the notochord 3. When assembling, adjust the adjusting sleeve of the central strut 1 so that the length of the central strut 1 is less than its zero-state design length. Adjust the adjusting sleeve of each ring cable 5 so that the length of each ring cable 5 is greater than its zero-state design length, and the lengths of the peripheral struts 2, ridge cables 3, oblique cables 4 and upper chord rigid ring rods 6 are zero-state design lengths;

2) Set tire frames on the ground, each tire frame has a support point of the same height, place the innermost upper chord rigid ring rod 6 assembled in step 1) horizontally on the tire frame, and adjust the position of the central support rod 1 Adjust the sleeve so that the central strut 1 is elongated, and the ridge cord 3 and oblique cable 4 connected to the central strut 1 are further stretched, the ridge cord 3 and oblique cable 4 are pulled, and the central strut 1 and the upper chord rigid ring rod 6 are tensioned. pressure, the ridge cable 3, the oblique cable 4, the central support rod 1 and the innermost upper chord rigid ring rod 6 together form a self-balancing system;

3) Place the second upper chord rigid ring rod 6 adjacent to the innermost upper chord rigid ring rod 6 in step 2) horizontally on the tire frame, and use the tensioning equipment and the adjusting sleeve to tension the inner ring After the cable 5 is stretched, the second ring of upper chord rigid ring rod 6 and its internal ridge cable 3, oblique cable 4, peripheral strut 2 and central strut 1 form a self-balancing system;

4) When the upper chord rigid ring rod 6 is not less than two turns, place the adjacent outer ring upper chord rigid ring rod 6 of the outermost upper chord rigid ring rod 6 that has formed a self-balancing system horizontally on the tire frame from the inside to the outside. First, use the tensioning equipment and the adjusting sleeve to tension the adjacent inner ring hoop 5. After the tensioning is completed, the upper chord rigid ring rod 6 of the circle and its internal ridge cable 3, oblique cable 4, and peripheral The strut 2 and the central strut 1 form a self-balancing system;

5) Lift the cable dome structure forming a self-balancing system obtained in step 4) to near the height of the ring beam, fix the joints of the outermost ridge cables 3 and oblique cables 4 with the ring beam support, and use tensioning equipment and adjustment With the sleeve, the outermost ring cable 5 is stretched, and the dome structure is formed.

The present invention can also include Levy type and Kaiwitt type cable dome structure, the corresponding positions in Levy type and Kaiwitt type cable dome structure are also installed with rigid ring rod and adjusting sleeve, and use the same construction method, no center This method can also be used for strut cable domes.

As stated above, while the invention has been shown and described with reference to certain preferred embodiments, this should not be construed as limiting the invention itself. Various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (4)

1. A rib ring type cable dome structure with upper chord rigid ring rods, characterized in that it comprises central struts, peripheral struts, ridge cables, oblique cables and ring cables, and the central struts, ridge cables and oblique cables are connected end to end A plurality of central cable-rod units sharing a central strut, the ridge cables and oblique cables are divergently connected to the top and bottom of the central strut respectively, and the peripheral struts, ridge cables and oblique cables are connected end-to-end to form a number of peripheral cable rods unit, the nodes of the ridge cables and oblique cables of each center cable-strut unit are connected to the tops of the peripheral struts of the peripheral cable-strut units, and the nodes of the ridge cables and oblique cables of the peripheral cable-strut units located in the inner circle are connected to the adjacent peripheral cables The top of the outer strut of the rod unit, the upper chord rigid ring rod is connected between the tops of the peripheral struts of two adjacent peripheral cable rod units in the same circle, and the bottom is connected with a hoop; The construction forming method based on the rib ring type cable dome structure with upper chord rigid ring bar, comprises the following steps: 1) Assemble the ridge cables, oblique cables, central struts and innermost upper chord rigid ring rods on the ground to obtain several interconnected central cable rod units sharing a central strut, and then assemble the ridge cables, oblique cables, hoop The peripheral struts and the upper chord rigid ring rods are assembled to obtain several interconnected peripheral cable-strut units. Each ridge cable connecting the top of the central strut and the support is a whole cable. Adjust the bolts on the connecting splint so that the connecting splint clamps the ridge cable , and then fix the ridge cable and the upper chord rigid ring rod, adjust the adjustment sleeve of the center support rod during assembly, so that the length of the center support rod is less than its zero-state design length, and adjust the adjustment sleeve of each ring ring to make the length of each ring ring greater than its zero-state design length, the lengths of peripheral struts, ridge cables, oblique cables and upper chord rigid ring rods are zero-state design lengths; 2) Set tire frames on the ground, each tire frame has a support point of the same height, place the innermost upper chord rigid ring rod assembled in step 1) horizontally on the tire frame, and adjust the adjustment sleeve of the center support rod The central strut is elongated, the ridge cables and oblique cables connected with the central strut are stretched, the ridge cables and oblique cables are under tension, the central strut and the upper chord rigid ring rod are compressed, and the ridge cables, oblique cables, and central struts It forms a self-balancing system together with the innermost upper chord rigid ring rod; 3) Place the second upper chord rigid ring rod adjacent to the innermost upper chord rigid ring rod in step 2) horizontally on the tire frame, and use the tensioning equipment and the adjusting sleeve to tension the inner ring cable, After the tension is completed, the second circle of upper chord rigid ring rods and their internal ridge cables, oblique cables, peripheral struts and central struts form a self-balancing system; 4) When the upper chord rigid ring rods are not less than two turns, place the adjacent outer ring upper chord rigid ring rods of the outermost upper chord rigid ring rods that have formed a self-balancing system horizontally on the tire frame from the inside to the outside. The tensioning device and the adjusting sleeve tension the adjacent inner hoops. After the tension is completed, the upper chord rigid hoop of the hoop and its internal ridges, obliques, peripheral struts and central struts form a self-balancing system; 5) Lift the cable dome structure forming a self-balancing system obtained in step 4) to near the height of the ring beam, fix the joints of the outermost ridge cables and oblique cables with the ring beam support, and use tensioning equipment and adjusting sleeves , tension the outermost ring cable, and the dome structure is formed. 2. The rib-ring cable dome structure with upper chord rigid ring rods according to claim 1, characterized in that: said central support rod is provided with an adjustment sleeve for adjusting the length. 3. The rib-ring cable dome structure with upper chord rigid ring rods according to claim 1 or 2, characterized in that: the ring cables are provided with adjustment sleeves for length adjustment. 4. The rib ring type cable dome structure with upper chord rigid ring rods according to claim 3, characterized in that: the surface of the upper chord rigid ring rods has lugs and connecting splints extending outward, and the peripheral struts and oblique The cable and the lug are hinged, the connecting splint is inserted into the notochord, and the notochord is clamped by adjusting the bolts on the connecting splint, thereby fixing the notochord and the upper chord rigid ring rod.