高温后混凝土抗压强度试验研究  

Experimental study on compressive strength of concrete after high temperature

作　　者：陈海彬 周建超 王棒棒 CHEN Haibin;ZHOU Jianchao;WANG Bangbang(Earthquake Engineering Research Center of Hebei Province,North China University of Science and Technology,Tangshan 063021,China)

机构地区：[1]华北理工大学河北省地震工程研究中心,河北唐山063021

出　　处：《混凝土》2021年第10期23-26,共4页Concrete

基　　金：国家自然科学基金项目(51478162,51608196);河北省自然基金项目(E2014209099,E2020209086)。

摘　　要：针对高温后的混凝土抗压强度问题,选取了本地区常用混凝土配合比,制作了C30和C40两个强度等级的100 mm×100 mm×100 mm的试件132块,分别在受火时间60、90 min、自然冷却和喷水冷却、高温后静置1、14 d的不同工况下进行模拟火灾试验,得到不同受火时间、不同冷却方式、不同静置时间和不同强度等级的高温后混凝土试件的抗压强度值,进一步分析了不同工况的影响程度,为高温后建筑结构或构件的鉴定评估和加固设计提供依据。According to the problem of concrete compressive strength after high temperature,using the typical raw materials of local area,132 pieces of 100 mm×100 mm×100 mm specimens with C30 and C40 strength grades were made.The simulated fire tests were carried out under different conditions of 60 and 90 min fire time,natural cooling and water spraying cooling,1 and 14 d standing after high temperature.The compressive strength values of concrete specimens with different fire time,cooling methods,standing time and strength grade after high temperature were obtained.The influence degree of different working conditions is further analyzed,which provides the basis for the appraisal and reinforcement design of building structures or components after high temperature.

关 键 词：高温后混凝土强度 受火时间 静置时间 冷却方式 抗压强度 

分 类 号：TU528.01[建筑科学—建筑技术科学]