CN218027189U - Stiffening rib with semi-closed and semi-open openings and stiffening plate - Google Patents

Abstract

The application relates to the field of stiffening plates, and discloses a semi-closed semi-open stiffening rib and a stiffening plate comprising the stiffening rib, and solves the problems that an open rib in the existing stiffening plate is anti-torsion and poor in bending rigidity, a closed rib is high in welding difficulty and easy to fatigue crack. The stiffening rib is characterized by comprising a web plate (1) and a flange part (2), wherein the stiffening rib is formed by molding a steel plate, and the web plate (1) and the flange part (2) are integrally connected; the flange part (2) is tubular and is formed by surrounding a steel plate at the lower part of the web plate (1), the flange part (2) is provided with a tail end (20) close to the web plate (1), and the distance between the tail end (20) and the web plate (1) is 0-15 mm. The upper part of the stiffening rib is provided with the opening section, so that the connection advantage of the opening rib is kept, the lower steel plate is bent to form a flange part capable of being closed naturally, the section of the lower edge of the rib is increased, and meanwhile, the torsion resistance and the bending resistance of the stiffening rib are improved greatly by absorbing energy through small deformation of the section of the lower part.

Description

Semi-closed and semi-open stiffening rib and stiffening plate

Technical Field

The application relates to the field of stiffening plates, in particular to a stiffening rib and a stiffening plate.

Background

The stiffening ribs are used as strip-shaped reinforcing parts and are usually arranged on one side of a single-layer steel top plate or a single-layer steel panel to form a stiffening plate, so that the virtual thickness of the single plate is increased, and the bending resistance, the torsion resistance and other properties of the single plate are improved. The composite material is widely applied due to light weight and good mechanical property. Such as bridge decks in bridges are typical stiffener applications. The bridge deck is an important component in a bridge structure, and not only participates in the integral stress of the bridge structure, but also directly bears the load of vehicles on the bridge deck, so that the loads of the vehicles on the bridge are transferred to other structural components.

From the form of the stiffening rib, the stiffening rib is mainly divided into an opening rib and a closing rib. The common open rib forms are mainly: t-shaped ribs, regular ball-end ribs, bias ball-end ribs, unequal corner steel ribs, plate ribs and the like. However, due to the defects that the torsional rigidity and the bending rigidity of the opening ribs are small and hot rolling or welding is needed, for example, the flat bulb ribs need to be customized by hot rolling in a steel mill, and the specification is dead; the inertia moment of the plate rib is small; the phenomenon of turning-up and landing of the flange at the far end of the L-shaped stiffening rib when the L-shaped stiffening rib is bent; the T-shaped stiffening ribs are similar to the L-shaped stiffening ribs and need hot rolling or welding and the like, so that the open rib bridge deck has smaller transverse load distribution capacity, the buckling strength of the structure is lower, two fillet welds are needed for connecting each open rib and the deck, and the number of welds needed in unit area is large; thus, open ribs are less efficient than closed rib deck panels.

The common form of the closed rib mainly comprises: the closed rib has good section performance and better bending resistance and torsion resistance than the open rib, but the closed rib has a closed section, welding can only be performed from the outside, the welding difficulty on the inner side is high, the welding seam is difficult to detect and follow-up maintenance, the problem of fatigue cracking is often caused, and the closed rib becomes a typical persistent ailment with no headache in the industry.

SUMMERY OF THE UTILITY MODEL

The purpose of this application is for solving current stiffening plate opening rib antitorque and bending stiffness poor, it is big to close a mouthful rib welding degree of difficulty, the poor scheduling problem of fatigue resistance, a semi-closed half open-ended stiffening rib is provided, the opening cross-section is still adopted on upper portion, the connection advantage of opening rib has been remain, the lower part steel sheet is bent and is formed pipy edge of a wing portion, not only increase the sectional area of stiffening rib lower edge, simultaneously through the small deformation energy-absorbing of lower part cross-section, improve stiffening rib antitorque by a wide margin, bending resistance, this application provides a stiffening plate that contains above-mentioned stiffening rib simultaneously.

In order to achieve the purpose of the application, the following technical scheme is adopted in the application:

the stiffening rib comprises a web plate and a flange part, wherein the stiffening rib is formed by molding a steel plate, and the web plate and the flange part are integrally connected;

the flange part is tubular and is formed by forming a steel plate at the lower part of the web plate in an enclosing mode, the flange part is provided with a tail end close to the web plate, and the distance between the tail end and the web plate is 0-15 mm.

Preferably, the tail end and the web are not welded or partially welded. Different from the traditional structure in a welding strengthening mode, the tail end and the web plate are not welded, or only a small amount of welding is needed to be adopted at complex structural parts such as cross stiffening ribs, and the like, and a large amount of joint parts are not welded, so that not only is the welding workload reduced, the cost reduced, but also the basic conditions of welding fatigue can be fundamentally reduced due to non-welding, namely the probability of welding fatigue is fundamentally stopped, one side constraint can be released due to non-welding, and the section of the flange part is allowed to have partial deformation so as to absorb energy due to deformation.

Preferably, the cross section of the flange part is triangular, the flange part comprises a first edge, a second edge and a third edge, the first edge is integrally connected with the web, the second edge is connected with the first edge and the third edge, and the third edge is close to the web. The stability of triangle-shaped is better than other shapes, when the stiffening rib is pressed or is bent, through the downwarping or bending of the first side of triangle-shaped, cause the second limit to produce ascending power, because the second limit deviates from the web central line, and then the second limit produces an inside closing force again, because the tail end of flange portion and the junction of web establish in one of them side of web, thereby the inside eccentric force that produces, make former third limit and web naturally closed a small amount of gaps reduce and push up tightly, the cross-section warp and consumed the load energy in this process, reduced the stress distribution to stiffening rib and panel connecting portion effectively, also because of the delay effect, reduced the rate or the slope of the stress change of stiffening rib and panel connecting portion.

Preferably, the included angle between the first side and the second side is alpha, and alpha is less than 60 degrees. The width of the flange part is reduced by small angles, so that the negative effect of shear hysteresis is reduced, the deformation of the first side is directly transmitted to the second side, the smaller the angle is, the faster and more direct the transmission is, the better the closing effect of the third side and the web plate is, and through the transmission path, the semi-closed stiffening rib with the energy consumption function and good comprehensive performance is formed at the cost of no welding or less welding.

Preferably, the angle between the first and third sides is β, β being greater than 60 °. The third side and the first side are closed at a large angle, and the method is an effective means for directly jacking to form a closed section.

Preferably, the web is provided with a wave portion on a side away from the flange portion, and a wave direction of the wave portion extends in a longitudinal direction of the stiffener and the wave height increases toward an outer side of the web. Through rolling the wave form in stiffening rib web upper end, increased the virtual thickness of stiffening rib web, improved shear and anti buckling resistance, simultaneously, because the web tip has the wave form, stiffening rib and panel welded welding seam become the curve welding seam by traditional unidirectional straight line welding seam, increased the length of welding seam, the welding seam extends along a plurality of directions simultaneously, during the atress, always has a favourable direction to undertake load, the welding seam intensity increases. Simultaneously, the wave form welding bead has increased the region of panel load for the bending moment performance geometry grade of shaking head of the resistance of stiffening rib increases, also is favorable to reducing the local stress of stiffening rib to the panel, also has showing the benefit to preventing that the floor from causing thin horse phenomenon for the panel.

Preferably, the wave portion is a sine wave, a trapezoidal wave, or a polygonal wave. The welding bead of the sine wave-shaped plate and the welding bead of the panel are smooth and smooth, the bending rigidity of the trapezoidal wave is high, the folding line wave and the panel have the performances, and the manufacturing is simple.

Preferably, the stiffening rib further comprises a connecting plate connected with the web plate, and an included angle phi is formed between the connecting plate and the web plate, and is larger than or equal to 85 degrees and smaller than or equal to 95 degrees. The connecting plate is used for being connected with the panel that is stiffened, and the connecting plate is attached to the panel during connection, and can be connected in an assembling mode such as welding fixation and bolt connection.

Preferably, the connecting plate is provided with a connecting hole. The connecting holes can be internally provided with connecting pieces such as bolts and the like, and the connecting pieces are particularly suitable for composite structural bridge floors, the lower screw rods are anti-loose by using webs, the upper nuts are solidified by using concrete on the upper part of the panel to form a structure which is never loose, the connecting structure is stable and controllable, and compared with the traditional open ribs adopting welding connection, the welding seams of 2 meters on both sides of each linear meter are reduced.

Preferably, the flange portion has a polygonal cross section. The polygonal cross section is a triangular cross section having a sharp angle with respect to the bottom, and the polygonal bottom is generally a plate-shaped and can serve as a connecting portion for supporting and supporting another member.

The application on the other hand provides a stiffening plate, including foretell half open-ended stiffening rib of semi-closed, still include the panel, stiffening rib and panel fixed connection, the flange position is located the one end that the panel was kept away from to the stiffening rib.

Compared with the prior art, the technical scheme has the following beneficial effects:

1. the problem of traditional open rib inertia moment little, need form great lower flange section through adding welding or hot rolling mode and increase bending resistance, anti-torque inertia moment is solved, adopt the base metal to bend in another way and enclose into the mode of great section, increase rib lower edge cross section, improved anti-torque, anti-bending inertia moment, therefore its performance of bending resistance is promoted by a wide margin. Simultaneously, the stiffening rib upper portion of this application still adopts the open cross section, remains the connection advantage that traditional open rib both sides are visual, the operation is convenient.

2. Stiffening rib upper portion is the web, the lower part is bent into the tubulose, and the tail end of flange portion leaves a small amount of clearances or the zero clearance of laminating naturally with the web, during the stiffening rib atress, because of the tail end of flange portion and the wherein one side of web joint portion at the web, the stiffening rib downwarps, flange portion is bent and is produced the pressfitting power at partial to web center, thereby the afterbody with the flange portion and the joint portion top of web are tight, and further the cross-section produces small deformation, through the small deformation energy-absorbing of cross-section, convert the load into closed cross-section's micro-strain, increase the pliability and the variability of structure. Simultaneously, form half open-ended and half closed cross section structure during the atress, for traditional opening rib, increased closed cross section, its anti-torsional performance of bending resistance promotes by a wide margin.

3. Because the tail end of the flange part and the web plate leave a small amount of gaps or naturally-laminated zero gaps, the gaps are basically recovered on the premise of no welding or a small amount of welding when the load moves forwards or is removed, not only are welding fatigue factors avoided, but also a practical energy-consuming dynamic structure is formed, the action time of force is prolonged by utilizing the delay effect of the existing gap state, closed jacking and recovery, the original dynamic load impact energy of a stiffening rib and a top plate connecting point is also shared or reduced through deformation energy consumption, the fatigue resistance of the stiffening rib and the top plate connecting point is remarkably improved, the stiffening rib is made of a whole steel plate with the same thickness through processing and forming, the forming replaces the welding of a common opening rib, the cost is low, meanwhile, welding seams are reduced, and the fatigue resistance is further improved.

Drawings

FIG. 1 is a schematic perspective view of a stiffener according to example 1 of the present application;

FIG. 2 is a schematic plan view of a stiffener according to embodiment 1 of the present application;

FIG. 3 is a schematic view showing the slight deformation of the flange part of a stiffener according to example 1 of the present application;

FIG. 4 is an enlarged view of a portion of FIG. 3;

FIG. 5 is a schematic perspective view of a stiffener according to example 2 of the present application;

FIG. 6 is a schematic plan view showing a structure of a stiffener according to example 2 of the present application;

FIG. 7 is a schematic perspective view of a stiffener according to example 3 of the present application;

FIG. 8 is a schematic plan view showing a structure of a stiffener according to example 3 of the present application;

FIG. 9 is a schematic structural view of a stiffener according to example 4 of the present application;

fig. 10 is a schematic structural view of a stiffener plate according to example 5 of the present application.

Reference numerals are as follows: 1. a web; 11. a waveform portion; 2. a flange portion; 20. a tail end; 21. a first side; 22. A second edge; 23. a third side; 3. a connecting plate; 31. connecting holes; 4. a panel.

Detailed Description

The present application is further described below with reference to the accompanying drawings. It should be noted that in the description of the present application, the terms "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application.

Example 1:

as shown in fig. 1, embodiment 1 provides a stiffening rib for a semi-closed and semi-open stiffening plate, the stiffening rib is in a strip shape, the stiffening rib is formed by molding a steel plate and comprises a web 1 and a flange part 2, and the web 1 and the flange part 2 are integrally connected; the flange part 2 is tubular, and is formed by a steel plate at the lower part of the web plate 1 to form a tubular member, and the flange part 2 is provided with a tail end 20 close to the web plate 1. As shown in the enlarged partial view of FIG. 4, the tail end 20 is naturally attached to the web 1 with a small gap, and the distance between the tail end 20 and the web 1 is 0-15 mm. The tail end 20 and the web plate 1 are not welded or can be locally welded and connected.

The upper part of the stiffening rib is a web plate 1, and the lower part of the stiffening rib is enclosed into a tubular shape to form a semi-open and semi-closed structure. Compared with the traditional opening rib, such as the flat bulb rib, the flat bulb rib needs hot rolling customization by a steel mill, and the specification is fixed; the inertia moment of the plate rib is small; the phenomenon of turning-up and landing of the flange at the far end of the L-shaped stiffening rib when the L-shaped stiffening rib is bent; the T-shaped stiffener is similar to the L-shaped stiffener and requires hot rolling or welding, etc., which all have low torsional stiffness and require hot rolling or welding. The stiffening rib upper portion of this application embodiment still adopts the open cross section, has both kept the connection advantage of open rib, no matter be welded connection or bolted connection, because both sides are visual, the operation is convenient, and the quality is controllable. Meanwhile, the lower part of the rib is bent to form a tubular shape, the edge section of the lower wing of the rib is enlarged, the steel consumption far away from the neutral axis is increased, and the torsion resistance and bending resistance inertia moment are improved, so that the torsion resistance performance of the rib is greatly improved.

As shown in fig. 3, when the stiffening rib is stressed in this embodiment, the panel bends downward to drive the stiffening rib to bend downward, and through the bending of the flange part 2, because the joint of the tail end 20 of the flange part 2 and the web plate 1 is on one side of the web plate 1, the flange part 2 bends to generate a pressing force biased to the center of the web plate, because when the tubular flange part 2 is formed, the tail end 20 of the flange part 2 and the web plate 1 leave a small gap or naturally fit, the pressing force firstly pushes the joint of the tail end of the flange part 2 and the web plate 1 tightly to close the cross section, further the closed cross section generates a micro deformation, and through the energy absorption of the micro deformation of the cross section, the load is converted into a micro deformation of the cross section, thereby increasing the flexibility and the strain of the structure. And because the flange part 2 is formed by bending a steel plate, the flange part is difficult to completely attach at a folding part in a natural state, a small gap is reserved, the forming error is absorbed, a space is reserved for deformation of the subsequent flange part 2 during bending, when the stiffening rib is loaded, the tail end 20 and the web plate 1 can be completely tightly propped to form a half-open and half-closed cross section, and the bending resistance and the torsion resistance of the stiffening rib are improved.

Meanwhile, the stiffening ribs are made of steel plates with the same thickness through processing and forming, welding is reduced through forming, the cost is low, and meanwhile, the fatigue resistance performance is better due to few welding seams.

Because the stability of triangle-shaped is better than other shapes, and processing preparation is simple and convenient, flange portion 2 preferably adopts the triangle-shaped cross section, as shown in fig. 2, the triangle-shaped cross section that open rib lower part was a steel sheet and enclosed through the shaping, and the triangle-shaped cross section includes first limit 21, second limit 22 and third limit 23, and first limit 21 and web 1 are connected integratively, and first limit 21 and third limit 23 are connected to second limit 22, and third limit 23 is drawn close with web 1. The angle between the first edge 21 and the second edge 22 is alpha, alpha < 60 deg.. The first side 21 and the third side 23 form an angle β, β being greater than 60 °.

As shown in fig. 3 and 4, when the triangular section is pressed or bent, the downward deflection or bending of the first side 21 of the triangle causes the second side 22 to generate an upward force, and as the second side 22 deviates from the central line of the web 1, and then the second side 22 generates an inward closing force, a small amount of gaps which are naturally closed by the original third side 23 and the web 1 are reduced and tightened, in the process, the deformation of the section consumes load energy, and as the stiffening rib is usually longitudinally long, the load is generated or moved, the deformation is generated or moved, the load is disappeared, the deformation disappears, and the time has a hysteresis delay effect, so that an energy absorption effect is formed, the stress distribution to the connecting part of the stiffening rib and the panel is effectively reduced, and the rate or the slope of the stress change of the connecting part of the stiffening rib and the panel is reduced due to the hysteresis delay effect.

The first edge 21 and the second edge 22 adopt a small-angle included angle alpha to reduce the width of the flange part 2, so that the negative effect of shear hysteresis is reduced, the deformation of the first edge 21 is directly transmitted to the second edge 22, the smaller the angle is, the faster the transmission is, the more direct the transmission is, and the closing effect on the third edge 23 and the web plate 1 is better, therefore, through the transmission path, the semi-closed stiffening rib with energy consumption function and good comprehensive performance is formed at the cost of no welding or few welding. The third side 23 closes at a large angle beta to the first side 1 and is an effective means of directly forming a closed cross-section.

Example 2:

as shown in fig. 5 and 6, embodiment 2 differs from embodiment 1 in that: in example 2, the web 1 has a wavy portion 11 at one end thereof remote from the flange portion 2, and the wavy direction of the wavy portion 11 extends in the longitudinal direction of the stiffener and increases in height toward the web end.

The thickness of the rib is increased by the limit of the height-thickness ratio of the thickness of the stiffening rib to the height of the rib, so that the material cost is increased, and more importantly, the self weight of the bridge deck system is too large to weaken the applicability of the bridge deck system in a large-span bridge. The virtual thickness of the stiffening rib web plate 1 is increased by rolling the waveform on the stiffening rib web plate 1, the shearing resistance and the buckling resistance of the stiffening rib are improved, meanwhile, the end part has the waveform, a welding seam formed by welding and connecting the stiffening rib and the panel is changed from a traditional straight welding seam in a single direction into a curved welding seam, the length of the welding seam is increased, meanwhile, the welding seam extends along a plurality of directions, when the reinforcing rib web plate is stressed, a favorable direction always bears the load, and the strength of the welding seam is increased. The provision of the wave shape significantly reduces the limitation of the height-thickness ratio, so that a higher performance stiffener can be formed with a thinner plate thickness. Meanwhile, the wave-shaped welding line enlarges the force bearing area of the panel, so that the geometric grade of the anti-oscillating bending moment performance of the stiffening rib is increased, the local stress of the stiffening rib on the panel is favorably reduced, and the effect of preventing the rib plate from causing the thin horse phenomenon on the panel is also obviously improved.

The waveform of the waveform portion 11 may be a sine wave, a trapezoidal wave, or a polygonal wave. The welding bead of the sine wave-shaped plate and the welding bead of the panel are smooth and smooth, the bending rigidity of the trapezoidal wave is high, the folding line wave and the panel have the performances, and the manufacturing is simple.

Example 3:

as shown in fig. 7 and 8, embodiment 3 differs from embodiment 1 in that: the stiffening rib also comprises a connecting plate 3 connected with the other end of the web plate 1, and an included angle phi is formed between the connecting plate 3 and the web plate 1, wherein phi is more than or equal to 85 degrees and less than or equal to 95 degrees. The connection plate 3 has a connection hole 31. The connecting plate 11 is used for connecting with a stiffened panel, and the connecting plate 11 is attached to the panel during connection, and may be fixed by welding or may be connected by an assembly method such as bolting.

Example 4

As shown in fig. 9, embodiment 4 differs from embodiment 3 in that: the flange part 2 has a polygonal cross section. The polygonal cross section is a triangular cross section having a sharp angle with respect to the bottom, and the polygonal bottom is generally a plate-shaped and can serve as a connecting portion for supporting and supporting another member.

Example 5:

as shown in fig. 10, embodiment 5 provides a stiffening plate including a stiffening rib and a panel 4, the stiffening rib being fixedly connected to the panel, and the flange portion 2 being located at an end of the stiffening rib remote from the panel. In example 5, the stiffener and the panel 4 are connected by a bolt assembly. The bolt connection is combined with the combined structure on the panel 4 to form a structure that the lower screw rod is anti-loose by using the web plate 1, and the upper nut is solidified by using concrete and never becomes loose, so that the connection structure is stable and controllable, and compared with the traditional opening rib, the welding seams of 2 meters on both sides of each linear meter are reduced.

The foregoing is a preferred embodiment of the present application, and it will be apparent to those skilled in the art that various changes and modifications may be made without departing from the principles of the application, and these are to be considered within the scope of the application.

Claims (11)

1. A semi-closed and semi-open stiffening rib comprises a web (1) and a flange part (2), and is characterized in that: the stiffening ribs are formed by molding a steel plate, and the web plate (1) and the flange part (2) are integrally connected; the flange part (2) is tubular and is formed by surrounding a steel plate at the lower part of the web plate (1), the flange part (2) is provided with a tail end (20) close to the web plate (1), and the distance between the tail end (20) and the web plate (1) is 0-15 mm.

2. A stiffener according to claim 1, characterized in that: the tail end (20) is not welded or is locally welded with the web plate (1).

3. A stiffener according to claim 1, characterized in that: the section of flange portion (2) is triangle-shaped, and flange portion (2) include first limit (21), second limit (22) and third limit (23), first limit (21) and web (1) body coupling, first limit (21) and third limit (23) are connected to second limit (22), third limit (23) draw close with web (1).

4. A stiffener according to claim 3, characterized in that: the included angle between the first side (21) and the second side (22) is alpha, and alpha is less than 60 degrees.

5. A stiffener according to claim 3, characterized in that: the first side (21) and the third side (23) form an included angle beta, and beta is larger than 60 degrees.

6. A stiffener according to claim 1, characterized in that: one side of the web (1) far away from the flange part (2) is provided with a wave-shaped part (11), the wave-shaped direction of the wave-shaped part (11) extends along the length direction of the stiffening rib, and the wave height is higher towards the outer side of the web (1).

7. A stiffener according to claim 1, characterized in that: the waveform portion (11) is a sine wave, a trapezoidal wave, or a polygonal wave.

8. A stiffener according to claim 1, characterized in that: the stiffening rib also comprises a connecting plate (3) connected with the web plate (1), and an included angle phi is formed between the connecting plate (3) and the web plate (1), wherein phi is more than or equal to 85 degrees and less than or equal to 95 degrees.

9. A stiffener according to claim 8, characterized in that: the connecting plate (3) is provided with a connecting hole (31).

10. A stiffener according to claim 1, characterized in that: the cross section of the flange part (2) is polygonal.

11. A stiffened plate comprising the semi-closed, semi-open stiffener of any of claims 1-10, wherein: still include panel (4), stiffening rib and panel (4) fixed connection, flange portion (2) are located the stiffening rib and keep away from the one end of panel (4).

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