混凝土高温力学性能分析

The analysis about high temperature mechanical performance of concrete

本文将国内外一些学者对高温后混凝土力学性能的试验进行了分析和对比。探讨了混凝土抗压强度和抗拉强度在不同受热温度下的变化规律,得出如下结论:抗压强度在300℃前衰减不明显,300℃～800℃是抗压强度衰减的主要温度段,800℃衰减为常温的30%;抗拉强度在300℃前衰减明显,300℃时衰减为常温的50%,800℃时衰减为零。

After analyzing the experiment results presented in this paper and other literatures,and exploring the regularity of compressive strength and tension of concrete at different temperature,we can get the following conclusions:The compressive strength of concrete's declining is not obvious before 300℃,and between 300℃ and 800℃ is the main phase of the concrete's declining.And the declining at 800℃ is 30% of that at normal atmospheric temperature.The tension of concrete's declining is obvious before 300℃,and the declining at 300℃ is 50% of that at normal atmospheric temperature, and the declining is zero at 800℃.