A reinforced concrete cylindrical node area steel wire mesh wrapped and external thin-walled circular steel pipe reinforcement structure and preparation method

Abstract

The invention relates to a reinforced concrete cylindrical node area reinforcing structure wrapped by a steel wire mesh and externally provided with a thin wall round steel pipe and a manufacturing method thereof and belongs to the field of reinforced concrete cylindrical node area anti-seismic performance reinforcing. Local steel wire mesh wrapping is first conducted on the upper portion and the lower portion of a cylindrical node, the steel wire mesh and a cylindrical node steel bar cage are bound through binding wires and cushion blocks, and then the thin wall round steel pipe is sleeved on the outside of the steel wire mesh and fixed on the steel bar cage by adopting fasteners and resistance spot welding to form the cylindrical node reinforcing structure. The thin wall round steel pipe and the steel wire mesh can provide a better restraining effect on concrete, prevent the concrete from cracking and falling too early under the multi-dimensional earthquake effect, can share a part of bending torque and shearing force of the node area and greatly improve anti-seismic performance such as bearing capacity and ductility of the normal section and the inclined section of the cylindrical node.

Description

technical field [0001] The invention relates to a reinforced concrete column joint area steel mesh wrapped and thin-walled circular steel pipe reinforced structure and a preparation method thereof, which belong to the field of strengthening the seismic performance of reinforced concrete column joints. Background technique [0002] Reinforced concrete frame structure is a structural form widely used in earthquake areas in my country. my country's "Code for Seismic Design of Buildings" (GB50011-2010) uses a series of anti-seismic measures to ensure the anti-seismic performance of structures designed according to frequent earthquakes under greater earthquake action, among which "strong columns and weak beams" is a key control measure , the purpose of which is to make the frame structure form a stable post-yield plastic energy-dissipating mechanism with good seismic performance under strong earthquakes, and to avoid the structure forming a story lateral movement mechanism in whic...

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Problems solved by technology

[0003] However, the large earthquakes in my country in recent years, such as the Wenchuan earthquake and the Yushu earthquake, have shown that a large number of beam-column joints of frame structures have suffered "strong beam and weak column" type failures.

The occurrence of this destructive mechanism resulted in the collapse of a large number of buildings, causing huge casualties

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