期刊论文

Yang, J.-H.(yjh.dr@263.net)

中文

工程力学

1000-4750

2005

22

6

134-141

10.3969/j.issn.1000-4750.2005.06.023

中国科学院资助项目

本校为第一且通讯机构

进行了双向侧压作用下混凝土静态受拉与受拉疲劳试验.对静态受拉试验的极限抗拉强度、轴向拉伸应变和侧向压缩应变进行了比较分析,轴向拉伸应变因侧压的存在而快速增长,侧向压缩应变也因轴拉作用而增大,而极限抗拉强度则因侧压影响而降低;对受拉疲劳试验,则得到了S-N方程,应力应变曲线,应变、疲劳变形模量比与疲劳次数关系曲线,其特征表现为三阶段规律;并通过定义的对数线性变换把上述三阶段曲线转换为直线;反之,利用这种线性关系可以求得三阶段曲线关系.同时对静态受拉与受拉疲劳试验的相关物理量进行了比较分析,疲劳寿命和疲劳变形模量也因侧压的影响而有较大幅度的降低.

The static and fatigue tensile behavior of concrete under bilateral compression is studied experimentally. The ultimate tensile strength, axial tensile strain and lateral compression strain are obtained and compared. It is seen that the axial tensile strain develops rapidly and the ultimate tensile strength decreases greatly with lateral compression. On the other hand, lateral compression strain develops rapidly with axial tension too. Through tensile fatigue experiments, some S-N equations, curves of stress-strain, strain-ratios of deformation...