Self-resetting fully prefabricated bridge pier-cap structure and its assembly method for easy post-earthquake repair

Abstract

The invention discloses a self-resetting fully prefabricated bridge pier-cap structure and an assembly method thereof which is easy to repair after an earthquake, including a prefabricated bridge pier, a prefabricated cap and a pile foundation; There is a full-length reserved channel; the prefabricated bridge piers are inserted into the reserved openings and connected with the prefabricated cap; A hole is reserved to connect the prefabricated cap and the pile foundation; energy-dissipating tendons can be removed from the prefabricated cap through the reserved hole, which is flexible and replaceable. The invention can realize the fully prefabricated assembly of the pier-cap structure, shorten the construction period, and reduce the environmental impact. In addition, the structure of the present invention has a self-resetting function, which can significantly reduce or eliminate the residual deformation of the bridge structure after the earthquake, and can quickly restore the seismic capacity of the bridge by replacing the energy-dissipating ribs, ensuring the normal use of the bridge after the earthquake, and has wide applicability and Positive social significance and scientific significance.

Description

technical field [0001] The invention belongs to the technical field of fully prefabricated bridge structures, and in particular relates to a self-resetting fully prefabricated pier-cap structure and an assembly method thereof which is easy to repair after an earthquake. Background technique [0002] In addition to ensuring structural safety and durability, current bridge construction also requires reducing interference to existing traffic, improving construction safety, reducing environmental pollution, improving construction quality, speeding up construction, and reducing life cycle costs. According to many practices at home and abroad The results show that the prefabricated bridge construction technology can fully meet the above requirements. [0003] At present, prefabricated assembly technology is mainly used in the superstructure of bridges, and fabricated bridge piers are gradually being applied in engineering practice. However, the caps supporting the bridge pier stru...

AI Technical Summary

Problems solved by technology

For the former, combined with the unbonded prestressed cables in the pier and the energy dissipation mechanism at the bottom of the pier, the structure can effectively control the residual displacement after the earthquake and provide considerable energy dissipation capacity, but its complex structure, cumbersome construction technology, and The increase in cost brought about by the additional energy-dissipating mechanism limits the general use of this structure; the latter design idea uses the self-weight of the structure as a self-restoring force, and dissipates energy by expanding the impact between the foundation and the foundation. This type of structure can reduce The seismic response and residual displacement of the bridge, but its bearing capacity is limited, and the continuous impact generated during the sway may cause local damage to the foundation contact surface, and its repairability and long-term service performance after the earthquake need to be further resolved

Generally speaking, the blank of prefabricated assembly technology in the construction of cap structure and the shortcomings in the current design scheme of self-resetting pier system have largely hindered the research and application of fully prefabricated assembled pier-cap structure

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