Embedded elastic rubber bearing device and construction method of applying bearing device to connection between prefabricated concrete bridge pier and pile cap

Abstract

The invention provides an embedded elastic rubber bearing device. The embedded elastic rubber bearing device comprises an elastic rubber bearing, an upper reinforcement steel plate and a lower reinforcement steel plate; a post-tensioning pre-stressing penetration steel tube hole is formed in the center of the elastic rubber bearing, and energy-consumption reinforced bar holes for allowing penetration of energy-consumption reinforced bars are formed in the circumference of the elastic rubber bearing; steel tube penetration holes and energy-consumption reinforced bar holes, positions and forms of which are in one-to-one correspondence with steel tube penetration holes and energy-consumption reinforced bar holes in the elastic rubber bearing, are respectively formed in the upper reinforcement steel plate and the lower reinforcement steel plate; in use, a post-tensioning pre-stressing penetration steel tube and energy-consumption steel tubes respectively and sequentially penetrate through the steel tube penetration holes and the energy-consumption reinforced bar holes formed in the upper reinforcement steel plate, the elastic rubber bearing and the lower reinforcement steel plate; the upper reinforcement steel plate and the lower reinforcement steel plate are respectively closely adhered to the upper surface and the lower surface of the elastic rubber bearing; shear studs are annularly welded between the penetration steel tubes and the energy-consumption reinforced bars of the upper reinforcement steel plate and the lower reinforce steel plate, and stirrups are annularly arranged on the outer sides of the energy-consumption reinforced bars. The construction method, which is provided by the invention, provides an anti-seismic energy-consumption connection method for cast-in-place reinforced concrete pile caps and piers.

Description

technical field [0001] The present invention relates to an implanted connection technology between a prefabricated concrete bridge pier column and a cap, an elastic connection device and a connection construction method thereof, in particular to an implanted elastic rubber bearing device and its application to a prefabricated concrete bridge The construction method of the connection between the pier column and the cap. Background technique [0002] The prefabricated assembly technology of bridge piers is an effective method to speed up bridge construction and reduce traffic blockages. It conforms to the concept of energy-saving, environmental protection, and low-carbon economic construction. It will lead the development and application of fully prefabricated bridge structures; The current connection technology mainly adopts the connection form of "wet joint" or "glue joint" of cast-in-place concrete; these two methods have the following shortcomings: [0003] (1) "Wet joint...

AI Technical Summary

Problems solved by technology

[0003] (1) "Wet joint" prefabricated assembled pier of cast-in-place concrete: Although it can achieve the same mechanical properties as the integral cast-in-place pier, the connection between the pier and the cap is at the Excessive bending moments will appear under the action of horizontal loads, so that plastic hinges will appear, and serious cracking behaviors will appear in the concrete. removed from normal use

The above factors limit the popularization and application of "wet joint" assembly technology in earthquake areas

[0004] (2) The connection form of "adhesive joints": Usually, unbonded prestressed tendons are used to connect the pier segments, and the segments in the plastic hinge area are reinforced by stirrups, steel sleeve energy-dissipating devices or energy-dissipating steel bars to This is to make up for the low energy dissipation capacity caused by simply relying on the connection of prestressed tendons; however, most results show that under cyclic loads, better ductility can be obtained by using stirrup densification, but it is easy to cause segmental concrete A large number of cracks; the use of steel sleeve energy dissipation devices in the plastic hinge area can obtain better ductility, and the residual displacement of the structure is small, but the energy dissipation capacity of the structure is relatively small, and it is easy to cause cracks in the pier concrete at the cap The use of energy-dissipating steel bars can increase the energy-dissipating capacity of the structure, but it will increase the residual displacement of the structure, the concrete at the root of the pier will be severely crushed, and the ductility coefficient of the pier will be reduced; due to the lack of research on the seismic energy-dissipating measures for the connection between the pier column and the cap , which limits the development and application of prefabricated bridge piers in earthquake-resistant areas

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