Method for arranging anti-buckling energy dissipation structures at root portion and circular steel tube pier

Abstract

The invention discloses a method for arranging anti-buckling energy dissipation structures at the root portion and a circular steel tube pier. The circular steel tube pier comprises an upper pier, a base and a lower pier which connects the upper pier with the base, the lower pier comprises an outer wall of a cylindrical structure, the outer wall is enclosed by high-strength steel plates, the inner portion of the outer wall is provided with the multiple anti-buckling energy dissipation structures, the anti-buckling energy dissipation structures are arranged in an annular array mode, each anti-buckling energy dissipation structure is composed of three layers of steel plates, the middle layer is an arc-shaped low yield point steel plate, the inner layer and the outer layer are arc-shaped steel shell plates, the arc-shaped steel shell plates and the arc-shaped low yield point steel plate are connected through bolts, and the two sides of the anti-buckling energy dissipation structure are connected with the two high-strength steel plates respectively through high-strength bolts. By means of the arc-shaped steel shell plates, the arc-shaped low yield point steel plate can be prevented from out-of-plane flexural buckling, the shear compression yield energy dissipation of the arc-shaped low yield point steel plate is guaranteed, and therefore the ductility, energy-dissipating capacity and seismic performance of the circular steel tube pier are improved.

Description

Technical field [0001] The invention relates to a steel bridge pier energy dissipation structure in the field of civil engineering, belonging to the technical field of steel bridge piers in bridge engineering, and specifically relates to a method for installing an anti-buckling energy dissipation structure at the root and a round steel pipe bridge pier. Background technique [0002] The experience of earthquake damage at home and abroad shows that bridges are vulnerable to earthquakes. The bridge pier is the main load-bearing structure of the bridge structure. Whether it is damaged or not plays a decisive role in the overall damage and destruction of the bridge structure. Severe damage to the bridge piers may cause the bridge to collapse, and it is difficult to repair and use it in time after the earthquake, which brings trouble to the rescue and disaster relief after the earthquake, and the loss is often very huge. [0003] At this stage, bridge piers at home and abroad generally...

AI Technical Summary

Problems solved by technology

Serious damage to bridge piers may cause the collapse of the bridge, and it is difficult to repair and use it in time after the earthquake, which will bring trouble to the rescue and disaster relief after the earthquake, and often cause huge losses

[0003] At this stage, bridge piers at home and abroad generally use reinforced concrete structures. This form of bridge piers has good compressive performance, but poor ductility, and has suffered serious damage in previous earthquakes.

The failure of concrete piers is mainly due to two defects in design and construction: 1) The deficiencies in the bending design of the piers are mainly due to the insufficient configuration of transverse restraint stirrups; 2) The design shear strength of the piers is insufficient, resulting in shear failure prior to ductility bending damage

However, in the earthquake, the shell plate at the root of the circular steel pipe pier is prone to local buckling deformation, resulting in a sharp deterioration in the ductility and energy dissipation capacity of the circular steel pipe pier

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