The dynamic mechanical constitutive equation of concrete under high temperture

被引：0

作者：

Jia Bin ^{[1
,2
]}

Li Zhengliang ^{[1
]}

Tao Junlin ^{[2
]}

Zhang Chuntao ^{[2
]}

机构：

[1] Chongqing Univ, Dept Civil Engn, Chongqing 400030, Peoples R China

[2] Southwest Univ Sci & Technol, Dept Civil Engn & Architec, Mianyang 621010, Peoples R China

来源：

ARCHITECTURE AND BUILDING MATERIALS, PTS 1 AND 2 | 2011年 / 99-100卷

关键词：

Concrete; High temperature; Dynamic Constitutive Relation; Damage Model;

D O I：

10.4028/www.scientific.net/AMM99-100.782

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Based on the test by the split Hopkinson Pressure Bar (SHPB), in this papaer the research on the dynamic mechanical properties of concrete under high temperture has been conducted, the influence law of temperature and strain rate on the mechanical peoperties has been analyzed, and the dynamic stress-strain curves of concrete under high temperature have been obtained. Analysis indicate that the concrete strain rate hardening effect is coupled with the high temperature weakening effect. Therefore, on the basis of classical damage theoretical model, in accordance with the concrete high-temperature dynamic mechanical characteristics, a unified equation is established to describe the whole process of concrete dynamic stress-strain relationship under high temperature, which is well coincided with the test results.

引用

页码：782 / +

页数：2