A new type of box-shaped steel bridge pier

Abstract

The invention discloses a novel box-type steel bridge pier. The novel box-type steel bridge pier comprises a box-type steel bridge pier main body, a transverse diaphragm, a buckling-restrained frame body and a bottom plate, which are welded together in sequence from top to bottom, wherein the buckling-restrained frame body comprises four right-angled and L-shaped high strength steel plates and four flat plate-shaped low yield point steel plates; the four high strength steel plates form four hollow square-shaped corners; corresponding arms of the two adjacent high strength steel plates are detachably connected with each other through a low yield point steel plate; the external side surface of each low yield point steel plate is aligned with the external side surface of the corresponding arm of each high strength steel plate; and an internal restraint steel plate and an external restraint steel plate are also locked on the internal side and the external side of each low yield point steel plate, respectively. The novel box-type steel bridge pier disclosed by the invention is simply structured, is fast to construct on site, can be rapidly detected and repaired after earthquakes and is convenient for promotion and application in practical engineering.

Description

technical field [0001] The invention relates to the energy-dissipating structural form of a steel pier in the field of civil engineering, in particular to a box-shaped steel pier with an anti-buckling energy-dissipating frame at the root, and belongs to the technical field of steel pier in bridge engineering. 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 serious earthquake disasters. The casualties and economic losses caused by the earthquake are very huge. The bridge, the key link of transportation, is responsible for transporting materials and saving lives in earthquake relief. It is of great significance to study the new earthquake-resistant system of bridges. [0003] In current bridge piers designed based on ductility, the preset section ductile deformat...

AI Technical Summary

Problems solved by technology

However, there are the following shortcomings: 1. The ductile deformation of the section is too large and it is difficult to recover locally, which leads to 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. , The demolition and reconstruction of bridge piers on the traffic lifeline will hinder traffic and aggravate urban traffic congestion

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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