Novel pre-stressed steel plate hoop device and installation method thereof

Abstract

The invention discloses a novel pre-stressed steel plate hoop device and an installation method thereof. The structure of the device comprises two U-shaped steel hoop plates that can compose a whole hoop, two suites of tensioning plates and tensioning bolts that can prestress the steel hoop. The device and the method have good technical reinforcement effect, and the structure has simple structure, convenient operation, low cost and has the advantages of environment protection and energy conservation.

Description

technical field [0001] The invention relates to a prestressed steel plate hoop device capable of reinforcing reinforced concrete columns and bridge piers. Background technique [0002] The most serious defect of existing reinforced concrete columns and piers is mainly the insufficient configuration of stirrups. In the seismic strengthening of reinforced concrete columns, attention should be paid to how to make the supplementary part produce good lateral restraint on the original section, so as to increase the ductility of the reinforced structure to the greatest extent. At the same time, the reinforcement scheme should also minimize the stress lag of the reinforced part, so that the reinforced part and the original structure can work together effectively. An effective way to solve the above technical problems is to use transverse prestressing technology to strengthen the concrete column, so that the concrete column can obtain good lateral restraint and achieve the purpose o...

AI Technical Summary

Problems solved by technology

This kind of prestressing device can achieve a large prestress level, but the reinforcement process is very cumbersome, and there is great difficulty in local anchoring on the side of the concrete column, and the reinforcement cost is very high, which is not consistent with the original intention of structural reinforcement. matched

The design of the lateral prestressing device at the University of Alberta is relatively simple. Four narrow slabs enclose the concrete column, and the slab corresponding to the corner of the concrete column is equipped with bolts at an angle of 45 degrees to the side length. The application of prestress is realized through the tensioning of oblique bolts. This prestress application mechanism has a simple structure, is more convenient to operate, and has a lower reinforcement cost. Poor, and each corner needs to be operated, therefore, to achieve the predetermined reinforcement effect, the workload is still relatively large

Since the direction of the applied prestress is not in the same direction as the direction of the strip, there are inevitably problems of corner stress concentration and eccentric force

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