CN210194416U - Multi-stage energy-consumption type beam falling prevention device - Google Patents
Multi-stage energy-consumption type beam falling prevention device Download PDFInfo
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- CN210194416U CN210194416U CN201920301950.6U CN201920301950U CN210194416U CN 210194416 U CN210194416 U CN 210194416U CN 201920301950 U CN201920301950 U CN 201920301950U CN 210194416 U CN210194416 U CN 210194416U
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Abstract
The utility model discloses a girder installation is prevented falling by multistage power consumption type, including stock bolt, mild steel, L shape angle steel, bolt and triangle-shaped stiffening plate. One end of the L-shaped angle steel is connected with the mild steel through a long rod bolt, and the other end of the L-shaped angle steel is connected with the bridge pier through a bolt, so that the effective lap joint length between the main beam and the bridge pier is increased, and the longitudinal beam falling is prevented; the top end of the long rod bolt is embedded into the rectangular groove in the bottom surface of the main beam, the main beam is allowed to longitudinally slide along the long rod bolt along the groove, when the displacement of the main beam is about to exceed the effective lap joint length of the L-shaped angle steel, the long rod bolt blocks the main beam, the main beam cannot continuously slide, the longitudinal beam falling is prevented, and at the moment, the soft steel can deform to play a role in energy consumption; the triangular stiffening plate is arranged on the inner side of the L-shaped angle steel so as to increase the overall rigidity. The utility model discloses the roof beam that falls that the girder displacement was too big to arouse when preventing the earthquake from taking place effectively can regard as a method of roof beam that falls is prevented to existing bridge to use simultaneously.
Description
Technical Field
The utility model belongs to the technical field of the bridge antidetonation, in particular to girder assembly that falls is prevented to multistage power consumption type for the roof beam assembly that falls is prevented to bridge.
Background
In recent years, earthquake frequently occurs at home and abroad, due to bridge damage caused by earthquake, a bridge structure generates large relative displacement between an upper structure and a lower structure under the action of strong earthquake, and when the displacement exceeds the actual beam falling prevention length or limit of the bridge, beam falling occurs, so that traffic is interrupted, great difficulty is brought to disaster relief work, and huge loss is caused. Therefore, how to ensure that the bridge does not fall in the earthquake is the key work in the earthquake resistance of the bridge. The collapse of the falling beam is the most serious earthquake damage of the bridge, and the effective method for avoiding the earthquake damage is to adopt a beam falling prevention measure. Under the action of strong shock, when the horizontal earthquake force transmitted to the support by the upper structure is greater than the maximum friction force which can be provided by the support, the beam body and the support can slide, and when the pier-beam relative displacement generated by sliding exceeds the effective lap joint length of the pier, the beam falling can occur. At present, bridges in China mainly adopt anti-seismic facilities such as anchor bolts and stop blocks, and basically no anti-falling device for preventing the bridges from falling is arranged. The device for preventing the bridge from falling is an effective earthquake reduction and prevention system for preventing the bridge from collapsing when an earthquake occurs, is a necessary device for protecting an important bridge or a high-risk bridge, can improve the safety of the bridge, and has wide application prospect.
Therefore, a multistage energy-consuming type beam falling prevention device capable of effectively preventing the beam from falling when the main beam is excessively displaced due to the occurrence of an earthquake is urgently needed.
SUMMERY OF THE UTILITY MODEL
The invention aims to provide a multi-stage energy-consumption type beam falling prevention device which can effectively prevent a beam from falling when the main beam is excessively displaced due to an earthquake.
The technical scheme adopted by the invention is as follows: a multi-stage energy-consumption type beam falling prevention device comprises a long rod bolt, soft steel, L-shaped angle steel, a bolt and a triangular stiffening plate;
one end of the L-shaped angle steel is connected with the mild steel through a long rod bolt, and the other end of the L-shaped angle steel is connected with the pier through a bolt, so that the effective lap joint length between the main beam and the pier is increased, the effective lap joint length can be designed as required, and the longitudinal beam falling is prevented;
the top end of the long rod bolt is embedded into the rectangular groove in the bottom surface of the main beam, the main beam is allowed to longitudinally slide along the long rod bolt along the groove, when the displacement of the main beam is about to exceed the effective lap joint length of the L-shaped angle steel, the long rod bolt blocks the main beam, the main beam cannot continuously slide, the longitudinal beam falling is prevented, and at the moment, the soft steel can deform to play a role in energy consumption; the rectangular groove of the bottom surface of the main beam is required to be arranged before the anti-falling beam device is installed, the length of the rectangular groove of the bottom surface of the main beam is designed according to the effective lap joint length of the L-shaped angle steel, and the width of the rectangular groove of the bottom surface of the main beam is slightly larger than the width of the long rod bolt.
The triangular stiffening plate is arranged on the inner side of the L-shaped angle steel, and two right-angle sides of the triangular stiffening plate are respectively welded with the L-shaped angle steel so as to increase the integral rigidity. The invention can effectively prevent girder falling caused by overlarge main girder displacement when an earthquake occurs, and can be used as a method for preventing the girder falling of the existing bridge.
Preferably, the side face of the L-shaped angle steel is connected with the concrete pier through high-strength bolts, the L-shaped angle steel is made of Q345 steel, and the thickness and the width of the steel plate and the number of required bolts are calculated and determined according to the span, the width and the like of the bridge.
Preferably, the bolts and the long rod bolts meet the basic performance requirements of the GB/T3098.1-2010 standard, and the performance grade is not lower than 10.9.
Preferably, two right-angle sides of the triangular stiffening plate are respectively welded with the L-shaped angle steel, and Q345-grade steel is adopted.
Preferably, the mild steel is respectively connected with the main beam and the L-shaped angle steel through long rod bolts, the mild steel is not lower than Q345-grade steel, and the section size of the mild steel is set according to the required energy consumption.
Has the advantages that: the utility model combines the L-shaped angle steel, the long rod bolt and the soft steel, which work together to realize the requirement of preventing the girder from falling when the displacement of the girder is too large due to the occurrence of earthquake, and ensure the safety when the earthquake occurs, the girder can slide along the long rod bolt along the groove direction longitudinally, when the longitudinal displacement of the main beam exceeds the lapping length of the main beam and the pier (capping beam), the L-shaped angle steel plays a role, the lapping length of the main beam is increased and borne by the pier, when the displacement exceeds the lapping length of the pier, the L-shaped angle steel starts to work to increase the length of the longitudinal support, when the displacement of the main beam is about to exceed the length of the L-shaped angle steel support, the edge of the groove on the bottom surface of the main beam touches the long rod bolt, the long rod bolt blocks the main beam, the main beam cannot continuously slide, the longitudinal beam falling is prevented, the soft steel deformation plays a role in energy consumption, and the purpose of multi-stage fortification is achieved. The utility model discloses the roof beam that falls that the girder displacement was too big to arouse when preventing the earthquake from taking place effectively can regard as a method of roof beam that falls is prevented to existing bridge to use simultaneously.
Drawings
Fig. 1 is a schematic structural diagram of a multi-stage energy-consumption beam-falling prevention device of the present invention.
Detailed Description
The present invention will be further described with reference to the following detailed description and accompanying drawings.
As shown in figure 1, the invention discloses a multi-stage energy-consumption type beam falling prevention device which comprises a long rod bolt 1, mild steel 2, L-shaped angle steel 3, a bolt 4 and a triangular stiffening plate 5. One end of the L-shaped angle steel 3 is connected with the soft steel 2 through a long rod bolt 1, and the other end of the L-shaped angle steel is connected with the bridge pier through a bolt 4, so that the effective lap joint length between the main beam and the bridge pier is increased, the effective lap joint length can be designed as required, and the longitudinal beam falling is prevented; the top end of the long rod bolt 1 is embedded into the rectangular groove in the bottom surface of the main beam, the main beam is allowed to longitudinally slide along the long rod bolt 1 along the groove, when the displacement of the main beam is about to exceed the effective lap joint length of the L-shaped angle steel 3, the long rod bolt 1 blocks the main beam, the main beam cannot continuously slide, the longitudinal beam falling is prevented, and at the moment, the soft steel 2 can deform to play a role in energy consumption; the mild steel 2 is respectively connected with the main beam and the L-shaped angle steel 3 through long rod bolts 1; the triangular stiffening plates 5 are arranged on the inner sides of the L-shaped angle steels 3 to increase the overall rigidity. The invention can effectively prevent girder falling caused by overlarge main girder displacement when an earthquake occurs, and can be used as a method for preventing the girder falling of the existing bridge.
The working principle of the invention is as follows: when an earthquake occurs, the main beam can slide longitudinally along the groove direction along the long rod bolt, after the longitudinal displacement of the main beam exceeds the lap joint length of the main beam and a pier (bent cap), the L-shaped angle steel 3 plays a role, the lap joint length of the main beam is increased, borne by the pier, when the displacement exceeds the lap joint length of the pier, the L-shaped angle steel 3 starts to work, the longitudinal supporting length is increased, when the displacement of the main beam is about to exceed the 3 supporting length of the L-shaped angle steel, the groove edge of the bottom surface of the main beam touches the long rod bolt 1, the long rod bolt 1 blocks the main beam, the main beam can not slide continuously, the longitudinal beam falling is prevented, at the moment, the soft steel 2 deforms to play a role in energy consumption.
The embodiments of the present invention are described in detail above with reference to the drawings, but the present invention is not limited to the described embodiments. To those skilled in the art, many changes, modifications, substitutions and alterations can be made to the embodiments without departing from the spirit and scope of the invention.
Claims (5)
1. The utility model provides a roof beam device is prevented falling by multistage power consumption type which characterized in that: comprises a long rod bolt, soft steel, an L-shaped angle steel, a bolt and a triangular stiffening plate;
one end of the L-shaped angle steel is connected with the mild steel through a long rod bolt, and the other end of the L-shaped angle steel is connected with the bridge pier through a bolt; the top end of the long rod bolt is embedded into a rectangular groove in the bottom surface of the main beam, the length of the rectangular groove in the bottom surface of the main beam is matched with the effective lap joint length of the L-shaped angle steel, and the width of the rectangular groove in the bottom surface of the main beam is larger than that of the long rod bolt;
the triangular stiffening plate is arranged on the inner side of the L-shaped angle steel, and two right-angle sides of the triangular stiffening plate are respectively welded with the L-shaped angle steel.
2. The multi-stage energy-consuming type beam falling prevention device according to claim 1, wherein: the side face of the L-shaped angle steel is connected with the concrete pier through high-strength bolts, and the L-shaped angle steel is Q345 steel.
3. The multi-stage energy-consuming type beam falling prevention device according to claim 1, wherein: the bolt and the long rod bolt meet the basic performance requirements of the specification GB/T3098.1-2010, and the performance grade is not lower than 10.9 grade.
4. The multi-stage energy-consuming type beam falling prevention device according to claim 1, wherein: the triangular stiffening plate is made of Q345-grade steel.
5. The multi-stage energy-consuming type beam falling prevention device according to claim 1, wherein: the mild steel is not lower than Q345-grade steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920301950.6U CN210194416U (en) | 2019-03-11 | 2019-03-11 | Multi-stage energy-consumption type beam falling prevention device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920301950.6U CN210194416U (en) | 2019-03-11 | 2019-03-11 | Multi-stage energy-consumption type beam falling prevention device |
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| CN210194416U true CN210194416U (en) | 2020-03-27 |
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| CN201920301950.6U Active CN210194416U (en) | 2019-03-11 | 2019-03-11 | Multi-stage energy-consumption type beam falling prevention device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111501532A (en) * | 2020-04-26 | 2020-08-07 | 长安大学 | Assembled box girder bridge and earthquake-resistant structure thereof |
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2019
- 2019-03-11 CN CN201920301950.6U patent/CN210194416U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111501532A (en) * | 2020-04-26 | 2020-08-07 | 长安大学 | Assembled box girder bridge and earthquake-resistant structure thereof |
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