High-energy-consumption exposed steel column foot capable of being quickly repaired after earthquake and construction and maintenance method thereof

Abstract

The invention relates to a high-energy-consumption exposed steel column foot capable of being quickly repaired after an earthquake and a construction and maintenance method thereof. The high-energy-consumption exposed steel column foot comprises a concrete foundation, a mortar cushion, a steel column bottom plate and outer bottom plates which are arranged on the periphery of a steel column, wherein the concrete foundation, the mortar cushion, the steel column bottom plate and the outer bottom plates are arranged from bottom to top. The outer bottom plates are connected with the concrete foundation through angle steel; the top corner and one edge of each piece of angle steel are located on the concrete foundation; one end of each outer bottom plate is connected with the steel column bottomplate, the other end of each outer bottom plate is connected with the other edge of the corresponding angle steel; inner foundation anchor bolts penetrate through the steel column bottom plate and themortar cushion to be pre-embedded into the concrete foundation; and outer foundation anchor bolts penetrate through the angle steel to be pre-embedded into the concrete foundation. The high-energy-consumption exposed steel column foot capable of being quickly repaired after the earthquake has good earthquake-resistant performance and energy consumption capability, and the quick repairing capability, is easy to construct, controllable in damage, high in energy consumption capability and capable of reducing structural damage under the earthquake effect, and has high engineering application value.

Description

technical field [0001] The invention belongs to the anti-seismic field of construction engineering, and in particular relates to a high-energy-consuming exposed steel column foot that can be quickly repaired after an earthquake and a construction and maintenance method. Background technique [0002] According to the steel structure design code, the steel column feet used to connect the steel column and the foundation are mainly divided into three types: exposed type, outsourcing type and embedded type. Among them, the exposed column base is easy to construct, saves materials, and has a clear force transmission mechanism, which has become a widely used form of column base. However, the base plate of the exposed column foot is prone to slip under earthquake load, the degree of fixation is low, the hysteresis curve has an obvious pinch effect, and the energy dissipation capacity is poor. Moreover, the column foot is severely damaged under the earthquake and cannot be repaired q...

AI Technical Summary

Problems solved by technology

The destruction of the column foot will reduce the rotational stiffness of the column, resulting in excessive displacement between floors of the building, damage or even collapse, resulting in huge economic losses

[0003] The seismic performance of the existing exposed steel column feet has the following deficiencies: (1) The degree of fixation is low

Since the anchor bolts are deeply buried in the concrete foundation and mortar cushion, and are prone to large plastic deformation or even fracture, it is difficult to quickly repair on site after the earthquake, which is not conducive to the smooth progress of post-disaster reconstruction work

Many earthquake disasters have shown that after the earthquake damage, the anchor bolts have been completely broken, and the entire column foot has irreparable damage, resulting in huge economic losses.

Images