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

Abstract

The invention discloses a method for arranging anti-buckling energy dissipation structures at the root portion and a box steel pier. The box steel pier comprises an upper pier, a base and a lower pier which connects the upper pier with the base, the lower pier comprises a square outer wall of a cylindrical structure, the outer wall is enclosed by four high-strength steel plates, the inner portion of the outer wall is provided with the anti-buckling energy dissipation structures between the two high-strength steel plates (namely at the four corners of the lower pier) which are connected perpendicularly, 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 box steel pier are improved.

Description

technical field [0001] The invention relates to an energy-dissipating structure of a steel pier in the field of civil engineering, and belongs to the technical field of steel pier in bridge engineering, in particular to a method for setting an anti-buckling energy-dissipating structure at the root and a box-shaped steel pier. Background technique [0002] Earthquake disasters are sudden and devastating, which seriously threaten the safety of human life and property. my country is located in the two most active seismic belts in the world, and is one of the countries that suffer the most severe earthquake disasters. The casualties and economic losses caused by the earthquake are very huge, and the key link of transportation - bridges, in the earthquake relief Assuming the important responsibility of transporting materials and saving lives, it is of great significance to study the new seismic system of bridges. [0003] In past piers designed based on ductility, the pre-determi...

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Problems solved by technology

[0003] In past piers designed based on ductility, the pre-determined section ductile deformation mechanism is mainly realized by the yielding of the structural material of the pier to form a plastic hinge of the section, which occurs under moderate earthquake intensity, resulting in non-negligible residual deformation

There are several deficiencies: 1. The ductile deformation of the section is too large and it is difficult to recover locally, resulting in the overall demolition; 2. Even if the ductile deformation is within the limit, the bearing capacity and stiffness of the designed section will decrease significantly, which is not conducive to continuing to work; 3. For traffic Removal and rebuilding of bridge piers on lifeline impedes traffic

However, in the earthquake, the wall plate at the root of the box-shaped steel pier is prone to local buckling deformation, resulting in a sharp deterioration of the seismic performance of the box-shaped steel pier

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