• 首页
  • 期刊介绍
  • 编委会
  • 征稿启事
  • 期刊订阅
  • 相关下载
  • 联系我们
基于DIC技术的高温后混凝土变形性能
Deformation Behavior of Concrete under Uniaxial Compression after High Temperature by DIC Technology
投稿时间:2018-11-19  修订日期:2019-02-14
DOI:103969/j.issn.1007 9629201904012
中文关键词:  高温  变形  数字图像相关  应变云图  体应变  极限应变
英文关键词:high temperature  deformation  digital image correlation(DIC)  strain nephogram  body strain  ultimate strain
基金项目:国家自然科学基金资助项目(11762015,11362013);内蒙古自治区高等学校科学研究项目(NJZY19080);内蒙古自治区研究生科研创新资助项目(B20171012806);内蒙古工业大学科学研究项目(X201709)
           
作者单位
时金娜
SHI Jinna
内蒙古工业大学内蒙古自治区土木工程结构与力学重点实验室,内蒙古呼和浩特010051
Key Laboratory of Civil Engineering Structure and Mechanics, Inner Mongolia Autonomous Region, Inner Mongolia University of Technology, Hohhot 010051, China
赵燕茹
ZHAO Yanru
内蒙古工业大学内蒙古自治区土木工程结构与力学重点实验室,内蒙古呼和浩特010051
Key Laboratory of Civil Engineering Structure and Mechanics, Inner Mongolia Autonomous Region, Inner Mongolia University of Technology, Hohhot 010051, China
郝松
HAO Song
海南三亚湾新城开发有限公司,海南三亚572000
Hainan Sanya Bay New Town Development Co., Ltd., Sanya 572000, China
王磊
WANG Lei
内蒙古工业大学内蒙古自治区土木工程结构与力学重点实验室,内蒙古呼和浩特010051
Key Laboratory of Civil Engineering Structure and Mechanics, Inner Mongolia Autonomous Region, Inner Mongolia University of Technology, Hohhot 010051, China
摘要点击次数: 167
全文下载次数: 0
中文摘要:
      基于DIC(数字图像相关)技术,对经历20,200,400,600和800℃后的混凝土在单轴受压过程中的全场位移进行采集,分析了混凝土在不同温度下、不同受力阶段应变云图的变化特征和变形参数的变化规律.结果表明:400℃是混凝土横向应变集中区域与纵向应变压缩量最大区域匹配的临界温度;横向应力应变曲线原点至上升段04fcθ(fcθ为温度θ下的峰值应力)时对应的斜率GrH对温度的响应要比弹性模量Eθ对温度的响应更加敏感;高温损伤会导致混凝土在较低应力比下产生较大的体积压缩.
英文摘要:
      Based on DIC(digital image correlation) technology, the whole field displacement of concrete subjected to uniaxial compression after 20, 200, 400, 600, 800℃ was observed. The variation characteristics of the strain nephogram and the variation law of the deformation parameters of concrete at different temperatures and different loading stages were analyzed. The results show that 400℃ is the critical temperature for the matching of the transverse strain concentration region and the maximum longitudinal strain compression area of concrete. Gr H (the slope corresponding to the origin of the transverse stress strain curve to the rising 04fcθ, fcθ is peak strain under temperature θ) is more sensitive to temperature than the elastic modulus Eθ. High temperature damage will lead to large volume compression of concrete at lower stress ratio.
查看全文  查看/发表评论  下载PDF阅读器
关闭