Box-shaped steel piers with embedded energy-dissipating shell plates

Abstract

The invention discloses a box-shaped steel pier with embedded energy consumption shell plates. The box-shaped steel pier with the embedded energy consumption shell plates comprises a box-shaped steel pier body and a transverse separation plate. The lower portion of the box-shaped steel pier body is provided with a root separation chamber. The box-shaped steel pier with the embedded energy consumption shell plates further comprises a bottom plate welded to the lower end of the box-shaped steel pier body, the four corners in the root separation chamber are respectively provided with one energy consumption shell plate, each energy consumption shell plate is a low-yield-point steel plate, the yield strength of each low-yield-point steel plate is 100 MPa or 160 MPa or 225 MPa, the upper ends of the energy consumption shell plates are welded to the transverse separation plate, the lower ends of the energy consumption shell plates are welded to the bottom plate, the two sides of each energy consumption shell plate are welded to the corresponding two side walls of the box-shaped steel pier body, and through holes are formed in the transverse separation plate. The box-shaped steel pier with the embedded energy consumption shell plates has the advantages that when the embedded energy consumption shell plates receive pressure, the energy consumption shell plates are buckled outwards, deformed and limited by the side walls of the pier, buckling loads received by the energy shell plates approach whole-section plastic yield loads, energy consumption capacity of the box-shaped steel pier can be remarkably improved, rapid damage detection and reinforcement of the box-shaped steel pier after vibration are achieved, construction is rapid, and the construction period is short.

Description

technical field [0001] The invention relates to the technical field of steel bridge piers, in particular to a box-shaped steel bridge piers. Background technique [0002] The experience of earthquake disasters in the past 20 years shows that with the development of urban modernization, the transportation network is becoming more and more important in the entire urban lifeline earthquake and disaster prevention system. As an important link in the transportation network, bridges play an extremely important role in post-earthquake rescue or post-disaster reconstruction work. Previous earthquake disasters have shown that once the bridge is damaged, it will seriously hinder the entire post-disaster rescue work, and at the same time, it will generate greater secondary disasters and cause greater loss of life and property. Therefore, the bridge piers should have sufficient strength , stability and seismic performance, in order to ensure the safety, durability and normal use of the...

AI Technical Summary

Problems solved by technology

[0004] However, due to the thin wall thickness of the box-shaped steel pier, the root wall of the box-shaped steel pier is prone to local buckling deformation during earthquakes, and the stress of the box-shaped steel pier is easy to concentrate at the corner welds, resulting in box-shaped steel piers. The corners of the steel piers are easy to tear, resulting in a sharp deterioration in the seismic performance of the box-shaped steel piers

[0005] In order to prevent the deformation of the root of the steel pier, the State Intellectual Property Office disclosed on November 24, 2010 an environment-friendly steel pier damping structure with a publication number of 101892627A, which consists of root compartments, transverse diaphragms, longitudinal stiffeners, The transverse stiffeners and low elastic modulus concrete are composed of five parts. The longitudinal stiffeners and transverse stiffeners are staggeredly welded in the root compartment, and the root compartment is filled with low elastic modulus concrete. The diaphragm is used to seal the surface of the low elastic modulus concrete; Although the steel pier with this method can make the root of the steel pier difficult to deform, on the one hand, the filling of low elastic modulus concrete will increase the self-weight of the steel pier, which in turn will increase the cost of foundation treatment of the pier, making the construction cost of the steel pier higher. On the other hand, it brings difficulties to the damage detection and reinforcement of steel bridge piers after the earthquake, which greatly limits the outstanding advantages of steel bridge piers such as quick on-site construction and rapid repair and reinforcement after earthquakes.

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