基于温度--应力试验的混凝土温度应力仿真  

Simulation of temperature stress in concrete based on temperature-stress test

作　　者：赵志方[1] 王哲[1] 朱敏敏[2] 赵志刚[3] 施韬[1] 刘艳明 ZHAO Zhifang;WANG Zhe;ZHU Minmin;ZHAO Zhigang;SHI Tao;LIU Yanming(College of Civil Engineering,Zhejiang University of Technology,Hangzhou 310023,China;Zhejiang College of Construction,Hangzhou 311231,China;Communication University of Zhejiang,Hangzhou 310018,China)

机构地区：[1]浙江工业大学土木工程学院,浙江杭州310023 [2]浙江建设职业技术学院,浙江杭州311231 [3]浙江传媒学院,浙江杭州310018

出　　处：《浙江工业大学学报》2024年第5期487-491,共5页Journal of Zhejiang University of Technology

基　　金：国家自然科学基金资助项目(52279142,52078460)。

摘　　要：为分析早龄期混凝土的温度变形和温度应力,使用ABAQUS有限元分析软件,考虑混凝土的热膨胀系数和弹性模量随等效龄期的变化规律,通过现有的堆石坝面板混凝土温度—应力试验测试数据建立温度—应力试验试件有限元分析模型,开展混凝土温度变形对应的温度场和应力场的数值仿真研究。研究结果表明:使用等效龄期,考虑早龄期混凝土热膨胀系数、弹性模量的时变性,可以提高温度应力场仿真模拟的精度,为实际工程提供更安全的设计依据。In order to analyze the temperature deformation and temperature stress of early-age concrete,the ABAQUS finite element analysis software was used to investigate the variations of thermal expansion coefficient and elastic modulus of concrete with the equivalent age.Based on the test data,a finite element analysis model of temperature-stress test specimens was established and the numerical simulation research of the temperature field and stress field corresponding to the temperature deformation of concrete was carried out.The research results showed that using the equivalent age and considering the time-varying properties of the thermal expansion coefficient and elastic modulus of early-age concrete can improve the accuracy of the temperature stress field simulation and provide a safer design basis for actual projects.

关 键 词：温度—应力试验 等效龄期 热膨胀系数 仿真计算 

分 类 号：TU528[建筑科学—建筑技术科学]