Title: Study on high temperature collapse detection technology of reinforced concrete columns strengthened with angle steel

Authors: YuPing Zeng; Fang Yu

Addresses: Sichuan College of Architectural Technology, Deyang, Sichuan, 618000, China ' College of Civil Engineering, Hunan City University, Yiyang Hunan, 413000, China

Abstract: Reinforced concrete column strengthened with angle steel has strong high temperature resistance. Through the quantitative analysis and testing of the high temperature collapse of concrete column, the formula design of reinforced concrete column is improved to enhance the high temperature collapse performance of concrete column. Reinforced concrete columns high temperature collapse technology strengthened by angle steel based on bilinear elastic hysteretic model is proposed and equivalent linear recursive analysis method is used to calculate the restoring force model of concrete column. Experimental results show that the method can be used to calculate the ultimate crack depth and fracture toughness reliability of concrete column and detect high temperature collapse of reinforced concrete columns. It can be effectively combined with regular field nondestructive testing and long-term strain monitoring to achieve high temperature collapse of concrete column detection.

Keywords: angle steel reinforcement; reinforced concrete column; collapse detection.

DOI: 10.1504/IJMMP.2018.096146

International Journal of Microstructure and Materials Properties, 2018 Vol.13 No.3/4, pp.228 - 239

Received: 22 Aug 2017
Accepted: 04 Jun 2018
Published online: 13 Nov 2018 *

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