高温作用下混凝土力学性能试验分析  

Experimental Analysis of Mechanical Properties of Concrete Under High Temperature

作　　者：王丽[1] 周林聪[1] 曲海坤 

机构地区：[1]吉林大学建设工程学院,吉林长春130012

出　　处：《施工技术》2017年第24期26-28,57,共4页Construction Technology

基　　金：吉林省科学技术发展计划项目(20160520021JH)

摘　　要：通过混凝土在高温作用后的试验,分析得出混凝土在不同温度、不同冷却方式下混凝土的力学性能。研究得出不同温度、不同冷却方式对混凝土的抗压强度、弹性模量以及应力应变关系等力学性能的影响。探讨得出高温作用后混凝土的抗压强度、弹性模量和应力应变关系随温度的变化规律以及随温度变化的拟合公式,为混凝土高温后的安全性能评估做出依据。研究表明:随着混凝土温度的升高,混凝土的抗压强度降低,峰值应变呈逐渐增大趋势,弹性模量则呈逐渐降低趋势。In order to study the mechanical properties of concrete after high temperature, this paper studies the concrete under different temperature and different cooling modes. In this paper, the effects of different temperatures and different cooling modes on the mechanical properties of concrete, such as compressive strength, elastic modulus and stress-strain relationship are analyzed. The variation law of compressive strength, elastic modulus and stress-strain relationship of concrete after high temperature is discussed. The results show that the compressive strength of concrete decreases, the peak strain increases, and the elastic modulus decreases gradually with the increasing of concrete temperature. These results can provide reference and basis for the design and analysis of concrete structures.

关 键 词：混凝土 高温 冷却方式 力学性能 试验 

分 类 号：TU502.6[建筑科学—建筑技术科学]