CN111236057A - Connecting device for anti-seismic support of viaduct panel and bridge panel - Google Patents

Abstract

The invention relates to a connecting device of an anti-seismic support of a viaduct deck and a bridge deck, which is arranged between a bridge column and the bridge deck and comprises a support upper plate and a support lower plate. The upper plate and the lower plate are made of reinforced concrete materials; the upper plate and the lower plate are supported by a plurality of rubber cushion layers and elastic memory alloy plates, so that the pressure of the upper bridge deck and the load of a vehicle can be integrally and stably supported, and when an earthquake disaster happens, the sliding block can be displaced by the support under the action of rubber and the memory alloy metal block, the vertical compression effect of the support is achieved, the energy generated when the earthquake happens is consumed, and then the original shape is restored due to elasticity; the invention has simple and convenient installation, can ensure that the upper bridge deck plate generates reasonable vertical vibration and is suitable for the development of the anti-seismic field of the viaduct.

Description

A connection device for the seismic bearing of an elevated bridge deck and the bridge deck

technical field

The invention relates to a viaduct, in particular to a connection device between the seismic bearing of the viaduct deck and the deck.

Background technique

Small and medium-span girder bridges are widely used in my country and are an extremely important part of my country's increasingly developed road traffic network. Cylindrical pier is one of the substructure forms commonly used in this type of bridge. The cylindrical pier is consolidated with the cap, and the load transferred from the upper structure of the bridge is finally transferred to the foundation through the cylindrical pier, so that the entire bridge structure can be maintained in normal use. At present, my country's current "Detailed Rules for Seismic Design of Highway Bridges" and "Code for Seismic Design of Urban Bridges" stipulate that small and medium-span girder bridges are required to maintain elasticity under the action of E1 earthquake, damage is allowed under E2 earthquake action, and plastic hinges are allowed to appear on piers. However, in the Wenchuan earthquake in 2008 and the Yushu earthquake in 2010, many small and medium-span beam bridges suffered varying degrees of damage, including cracking at the bottom of a single-column pier or cracking at the connection between the beam and the pier-column of a double-column pier (such as: Miaoziping). Bridge, No. 1 Bridge of Changu Temple, etc.) is one of the most common forms of damage to the substructure of bridges. This is mainly due to the excessive shear force transmitted to the bridge pier by the bridge superstructure during the earthquake, or the high height or mass of the bridge pier itself causes the bridge pier itself to generate a large inertial force during the earthquake. If the large bending deformation exceeds its bearing capacity, the light one will crack the pier, and the heavy one will break the bridge pier. It can be seen that the piers of the existing medium and small span girder bridges in my country are far from meeting the seismic requirements, and seismic reinforcement is required. In response to this situation, there are two main methods of vibration reduction and isolation: one is to use vibration isolation bearings at the pier-beam connection, and install shock absorption devices, such as viscous dampers, elastic-plastic steel damping The second is to use concrete or steel pipe to wrap the pier bottom to increase the section bearing capacity of the pier bottom, so that it has enough capacity to resist the seismic load. However, these two methods have certain shortcomings: the first method requires the installation of high-priced shock isolation bearings, the installation of shock isolation devices requires sufficient space between the piers and beams, and traffic must be suspended when replacing , but this method has no obvious shock absorption effect for bridge piers with high pier height and high quality; when the second method is implemented, traffic also needs to be interrupted. If concrete is used, the poured concrete needs to be maintained. The entire reinforcement period is long, and if steel pipes are used, the connection performance between steel pipes and concrete cannot be easily guaranteed. Finally, this method will increase the seismic demand of the cap foundation, which may cause damage to the cap foundation under the action of earthquakes.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a connection device between the seismic bearing of the viaduct deck and the bridge deck. Vertical displacement, dissipate seismic energy, improve the overall seismic performance of the bridge body, and further reduce the damage to the foundation caused by the earthquake.

In order to solve the problems existing in the prior art, the technical scheme adopted in the present invention is as follows:

A connection device for the seismic support of an elevated bridge deck and a bridge deck, which is placed between a bridge column and a bridge deck, includes an upper support plate and a lower support plate, and the lower surface of the support upper plate is symmetrically arranged with two Inverted trapezoidal rib, a built-in fixed steel plate A is arranged at the center position of the upper plate body of the support, and two rows of symmetrical reinforcement holes are arranged on the built-in fixed steel plate A; the adjacent bridge deck is arranged on the support. The middle position of the upper plate is butted, and a built-in fixed steel plate B is arranged at the end of the bridge deck, and a row of reinforcement holes is arranged on the built-in fixed steel plate B; the positions of the two built-in fixed steel plates B on the two adjacent bridge decks correspond to The built-in fixed steel plate A inside the upper plate of the support, two built-in fixed steel plates A and one built-in fixed steel plate B are fixed by the steel plate fixing short ribs through the reinforcement holes; the lower surface of the lower plate of the support is arranged with a circular connecting column The rib, the diameter of the circular cavity formed inside is the same as the diameter of the bridge column, the circular connecting column rib is arranged with two steel reinforcement holes laterally, and the bridge column is horizontally arranged with a circular connecting column rib. Reinforcing bar holes are reserved in the columns corresponding to the two reinforcing bar holes on the upper surface; two rectangular grooves are symmetrically arranged on the upper surface of the lower upper plate of the support, and two sliding blocks and elastic grooves are symmetrically arranged inside each rectangular groove. Memory alloy plate, the elastic memory alloy plate is arranged on the outer side, and the sliding block is arranged on the inner side; the sliding block is arranged with a slope, and after the two sliding blocks are butted together, the inverted trapezoidal space formed is below the upper plate of the upper support. The inverted trapezoidal ribs on the surface fit together.

Further, after the upper plate of the support and the lower plate of the support are butted, in the space between the upper plate of the support and the lower plate of the support, a rubber layer is arranged in the center, and elastic memory alloy plates are arranged in the space at both ends. When an earthquake occurs, the rubber layer and the elastic memory alloy plate will work together to produce vertical displacement.

Further, the rubber layer is also arranged in the bottom space where the inverted trapezoidal rib fits with the two sliders. When vertical displacement occurs, the slider slides to both sides, and the bottom rubber layer and the elastic memory alloy on both sides of the slider. The plates will work together to produce vertical displacement.

The advantages and beneficial effects that the present invention has are:

The invention relates to a connecting device for the seismic support of an elevated bridge deck and the bridge deck, which is placed between the bridge column and the bridge deck, and comprises an upper support plate and a lower support plate. The upper and lower slabs are made of reinforced concrete; the upper and lower slabs are supported by multiple rubber cushions and elastic memory alloy plates, which can support the pressure of the upper deck and the vehicle load. Under the action of rubber and memory alloy metal blocks, the slider is displaced to achieve the vertical compression of the bearing, so as to consume the energy generated when the earthquake occurs, and then return to its original state due to elasticity. The invention is easy to install, can cause reasonable vertical vibration of the upper bridge deck, and is suitable for the development of the seismic resistance field of viaducts. Under the condition of ensuring the stability of the bridge column structure, in the event of an earthquake disaster, the bridge column can be displaced vertically under the action of the elastic memory alloy plate and the rubber layer to further dissipate energy, so that the bridge column is affected by the earthquake disaster. After energy dissipation and buffering, it can be restored to its original position, the bridge column and the support, the support and the bridge deck are simply connected up and down, and the upper and lower structures cooperate with the support. It is convenient to transport and greatly improves the overall seismic performance of the viaduct.

Description of drawings

1 is a front view of the structure of the connection device of the seismic bearing of the viaduct deck of the present invention and the deck;

Fig. 2 is the front view of the connection device of the seismic bearing of the viaduct deck and the deck of the present invention;

Fig. 3 is a splicing diagram of the connection device of the seismic bearing of the viaduct deck and the bridge deck of the present invention;

Figure 4 is the front view of the upper plate (3) of the support;

Figure 5 is the bottom view of the upper plate (3) of the support;

Figure 6 is the front view of the lower plate (4) of the support;

Figure 7 is a top view of the lower plate (4) of the support;

Figure 8 is the bottom view of the lower plate (4) of the support;

Figure 9 is the front view of the connection between the bridge deck (2) and the support upper plate (3).

In the figure: 1 is the bridge column, 2 is the bridge deck, 3 is the upper plate of the bearing, 4 is the lower plate of the bearing, 5 is the built-in fixed steel plate A, 6 is the built-in fixed steel plate B, 7 is the inverted trapezoidal rib, and 8 is the built-in fixed steel plate B. Rectangular groove, 9 is a circular column rib, 10 is a sliding block, 11 is an elastic memory alloy plate, 12 is a rubber layer, 13 is a steel plate fixing short rib, 14 is a bridge column fixing rib, 15 is a reinforcement hole, 16 is a Rebar holes are reserved in the column.

Detailed ways

In order to further illustrate the present invention, the present invention will be described in detail below with reference to the accompanying drawings and embodiments, but they should not be construed as limiting the protection scope of the present invention.

As shown in Figures 1-3, a connection device of the seismic bearing of the viaduct deck and the bridge deck of the present invention is placed between the bridge column 1 and the bridge deck 2, and the overall structure is a steel-concrete structure, including the support upper plate 3 and the lower plate 4 of the support. As shown in Figures 4 and 5, the support upper plate 3 is a prefabricated steel composite plate, and two inverted trapezoidal ribs 7 are symmetrically arranged on the lower surface. Fixed steel plate A5, two rows of symmetrical reinforcement holes 15 are arranged on the built-in fixed steel plate A5; adjacent bridge decks 2 are butted at the middle position of the support upper plate 3, and built-in fixed steel plates 2 are arranged at the ends of the bridge decks 2. Steel plate B6, a row of reinforcement holes 15 is arranged on the built-in fixed steel plate B6. As shown in Fig. 9, the positions of the two built-in fixed steel plates B6 on the two adjacent bridge decks 2 correspond to the built-in fixed steel plates A5 inside the upper plate 3 of the support, and the two built-in fixed steel plates A5 and one built-in fixed steel plate B6 are formed by The steel plate fixing short rib 13 is fixed through the reinforcement hole 15 . As shown in Figures 6-8, a circular connecting column rib 9 is arranged on the lower surface of the lower plate 4 of the bearing, and the diameter of the circular cavity formed inside is the same as the diameter of the bridge column 1. The connecting column rib 9 is horizontally arranged with two reinforcing bar holes 15, and the bridge column 1 is horizontally arranged with a reserved reinforcing bar hole 16 in the column corresponding to the two reinforcing bar holes 15 on the circular connecting column rib 9. The bridge column 1 is further reinforced with the bridge column fixing ribs 14; two rectangular grooves 8 are symmetrically arranged on the upper surface of the lower plate 4 of the support, and two sliding blocks 10 and 8 are symmetrically arranged inside each rectangular groove 8. The elastic memory alloy plate 11, the elastic memory alloy plate 11 is arranged on the outer side, and the sliding block 10 is arranged on the inner side; the sliding blocks 10 are all arranged with inclined surfaces, and after the two sliding blocks 10 are butted, an inverted trapezoidal space is formed It fits with the inverted trapezoidal rib 7 on the lower surface of the upper plate 3 of the upper support, so as to facilitate the butt joint of the upper plate 3 of the support and the lower plate 4 of the support, and complete the connection of the entire seismic production. After the support upper plate 3 and the support lower plate 4 are butted together, in the space between the support upper plate 3 and the support lower plate 4, a rubber layer 12 is arranged in the center, and elastic memory alloys are arranged in the space at both ends. For the plate 11, when an earthquake occurs, the rubber layer 12 and the elastic memory alloy plate 11 will work together to generate vertical displacement.

The rubber layer 12 is also arranged in the bottom space where the inverted trapezoidal rib 7 fits with the two sliders. When vertical displacement occurs, the slider 10 slides to both sides, and the bottom rubber layer 12 and the elasticity of the two sides of the slider 10 The memory alloy plates 11 will work together to generate vertical displacement. The rubber layer 12 and the elastic memory alloy plate 11 themselves can support the structure to be stable, and in the event of another earthquake, they both have a certain denaturation ability, so that the earthquake-resistant bearing is vertically deformed, and both have a certain recovery ability.

The above are only the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the principles of the present invention, several improvements and modifications can be made. It should be regarded as the protection scope of the present invention.

Claims (3)

1. A connection device for an anti-seismic bearing of an elevated bridge deck and a bridge deck, which is placed between a bridge column (1) and a bridge deck (2), characterized in that: it comprises an upper support plate (3) and a lower support plate (4) Two inverted trapezoidal ribs (7) are symmetrically arranged on the lower surface of the upper plate of the support (3), and a built-in fixed steel plate A ( 5), two rows of symmetrical reinforcement holes (15) are arranged on the built-in fixed steel plate A (5); the adjacent bridge decks (2) are butted at the middle of the upper plate (3) of the support, and the bridge decks (2) A built-in fixed steel plate B (6) is arranged at the end of the panel (2), and a row of reinforcement holes (15) is arranged on the built-in fixed steel plate B (6); The position of the built-in fixed steel plate B (6) corresponds to the built-in fixed steel plate A (5) inside the upper plate (3) of the support, and two built-in fixed steel plates A (5) and one built-in fixed steel plate B (6) are fixed by the steel plate short ribs (13) Fixing through the reinforcing bar hole (15); a circular connecting column rib (9) is arranged on the lower surface of the lower plate of the support (4), and the diameter of the circular cavity formed inside is the same as the diameter of the said support lower plate (4). The diameter of the bridge column (1) is the same, and the circular connecting column rib (9) is arranged with two reinforcement holes (15) laterally. Reinforcing bar holes (16) are reserved in the columns corresponding to the two reinforcing bar holes (15); two rectangular grooves (8) are symmetrically arranged on the upper surface of the lower support plate (4), and each rectangular Two sliding blocks (10) and an elastic memory alloy plate (11) are symmetrically arranged inside the groove (8), the elastic memory alloy plate (11) is arranged on the outer side, and the sliding block (10) is arranged on the inner side; the The sliding block (10) is arranged with an inclined plane, and after the two sliding blocks (10) are butted together, the formed inverted trapezoidal space fits the inverted trapezoidal rib (7) on the lower surface of the upper plate (3) of the upper support. 2. The device for connecting the seismic bearing of an elevated bridge deck and the bridge deck according to claim 1, characterized in that: after the upper plate (3) of the bearing and the lower plate (4) of the bearing are butted, the In the space between the upper plate (3) of the support and the lower plate (4) of the support, a rubber layer (12) is arranged in the center, and elastic memory alloy plates (11) are arranged in the space at both ends. When an earthquake occurs, the rubber layer (12) and the elastic memory alloy plate (11) work together to generate vertical displacement. 3 . The connection device of the seismic bearing of the viaduct deck and the deck according to claim 1 , wherein the rubber is also arranged in the bottom space where the inverted trapezoidal rib ( 7 ) fits with the two sliders. 4 . layer (12), when vertical displacement occurs, the sliding block (10) slides to both sides, and the bottom rubber layer (12) and the elastic memory alloy plates (11) on both sides of the sliding block (10) work together to produce vertical displacement .

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