Study on compressive mechanical capabilities of concrete after high temperature exposure and thermo-damage constitutive model

被引：53

作者：

Zhai, Yue ^{[1
,2
]}

Deng, Zichen ^{[2
]}

Li, Nan ^{[1
]}

Xu, Rui ^{[1
]}

机构：

[1] Changan Univ, Sch Geol Engn & Geomat, Xian 710054, Peoples R China

[2] Northwestern Polytech Univ, Sch Mech & Civil & Architecture, Xian 710061, Peoples R China

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2014年 / 68卷

关键词：

After high temperature exposure; Concrete; Physical properties; Mechanical properties; Constitutive equation;

D O I：

10.1016/j.conbuildmat.2014.06.052

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Deterioration of mechanical properties of concrete structure, caused by the high temperature of a fire, would seriously threaten people's lives and their properties. This paper aims to study the physical and mechanical properties such as strength, deformation, and elastic modulus and the changing regularity of the failure mode of concrete, with the uniaxial compression tests on 05 concrete being separately carried out under normal temperature and high temperature (300-1200 degrees C). A nonlinear elastic constitutive equation of concrete on thermo-damage is established on the basis of experiment. And its characteristic parameter is identified by the differential coefficient algorithm. Its reliability is testified by comparing and analyzing the calculated curve and testing curve. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：777 / 782

页数：6

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