纤维增强轻骨料混凝土耐高温性能及有限元分析  

Resistance to high temperature performance and finite element analysis on fiber reinforced lightweight aggregate concrete

作　　者：孙庆霞[1] 曹万智[2] 薛海儒 周茗如[4] 苏强[1] 

机构地区：[1]山东城市建设职业学院,山东济南250014 [2]西北民族大学土木工程学院,甘肃兰州730124 [3]中铁十局,山东济南250117 [4]兰州理工大学土木工程学院,甘肃兰州730050

出　　处：《混凝土》2011年第7期23-26,共4页Concrete

基　　金：山东省高等学校科技计划项目(J09LE51)

摘　　要：通过试验研究了轻骨料混凝土的耐高温性能,并与普通混凝土做比较,从残余强度入手,分析高温下混凝土性能的变化规律和机理,并给出了建议的计算公式;用有限元方法对轻骨料混凝土耐高温性能进行分析。结果表明:①统计给出的高温后轻骨料混凝土残余强度曲线的公式与试验结果吻合良好。②全轻骨料混凝土耐高温最好,砂轻骨料混凝土次之,普通骨料混凝土最差。③高温后轻骨料混凝土颜色发生改变,质量发生损失。该结论为轻骨料混凝土在高温环境下的应用提供技术依据。Researched the high-temperature properties of lightweight aggregate concrete though experimental, and compared with the ordinary concrete, starting from the residual strength to analysis of the changes in laws and mechanism about concrete under high temperature performance, and given the proposed formula for calculating;and analysis on the high-temperature performance of the lightweight aggregate concrete using finite element method.The results show that： （1）The lightweight aggregate concrete after high temperature residual strength curve formula which Statistics given are in good agreement with the experimental results. （2）The best high temperature of all-lightweight aggregate concrete, followed by sand lightweight aggregate concrete,the worst of ordinary aggregate concrete. （3）After high temperature the lightweight aggregate concrete have changed in color and lossed in quality.This conclusion provide technical basis for the application of lightweight aggregate concrete in the high-temperature environment.

关 键 词：轻骨料混凝土 高温作用 残余强度 有限元分析 

分 类 号：TU528.572[建筑科学—建筑技术科学]