火灾后已修复高强混凝土结构的地震反应分析

Experimental research on the mechanical properties of confined HSC after high temperatures

本文利用弹塑性时程反应分析方法 ,对火灾后已按常规方法修复的高强混凝土结构的抗震性能进行了初步探讨。结果表明 ,火灾后按等截面原则修复的高强混凝土结构的抗震性能基本可以恢复到火灾前的水平。随着受火温度的升高 ,火灾后已修复结构的抗震性能越接近于常温时的情况。对于相同的受火温度 ,随着受火层位置的升高 。

In this paper,experimental research on the mechanical properties of C80 confined high strength concrete(HSC) after high temperatures was done.The mechanical properties include the peak stress,peak strain,modulus of elasticity,poisson ratio and stress strain curve of HSC.The testing results are following: 1.Unconfined HSC spallings at high temperatures,while confined HSC does not spalling at the high temperatures. 2.The peak stress and modulus of elasticity decrease and the peak strain increase following the rising of temperatures. 3.The peak stress and peak strain increase with the rising of volume reinforcement ration.