| 单轴压缩条件下普通混凝土柱的峰后非线性尺寸效应 |
| |
| 引用本文： | 王学滨,张君.单轴压缩条件下普通混凝土柱的峰后非线性尺寸效应[J].北京科技大学学报,2009,31(1). |
| |
| 作者姓名： | 王学滨 张君 |
| |
| 作者单位： | 1. 辽宁工程技术大学力学与工程科学系,阜新,123000
2. 清华大学土木工程系,北京,100084;清华大学结构工程与振动教育部重点实验室,北京,100084 |
| |
| 基金项目： | 国家自然科学基金资助项目(No.50309004) |
| |
| 摘 要： | 将单轴压缩条件下遭受到剪切带(峰值应力之后呈现线性应变软化行为)形式的单一剪切破坏普通混凝土试样的峰后应力-应变曲线斜率的解析解推广为非线性情形.在峰值应力之前,采用Scott模型描述非线性的本构关系.剪切带的非线性应变软化本构关系由导出的最短普通混凝土试样峰后斜率反算.利用得到的峰后本构关系,对其他较长的普通混凝土试样的应力-应变曲线进行了预测.预测的峰后应力-应变曲线依赖于试样的高度,且与实验结果吻合.估算的剪切带内部平均塑性剪切应变远大于在单轴压缩条件下测得的轴向应变的极限值.若测得的峰后应力-应变曲线被视为本构关系,则普通混凝土柱的峰后延性将被极大地低估.
|
| 关 键 词： | 混凝土 应力应变曲线 非线性 应变软化 剪切带 尺寸效应 |
Size-dependent nonlinear post-peak stress-strain curve of normal concrete in uniaxial compression |
| |
| WANG Xue-bin,ZHANG Jun.Size-dependent nonlinear post-peak stress-strain curve of normal concrete in uniaxial compression[J].Journal of University of Science and Technology Beijing,2009,31(1). |
| |
| Authors: | WANG Xue-bin ZHANG Jun |
| |
| Abstract: | The analytical solution to the post-peak slope of the stress-strain curve of a uniaxially compressive concrete specimen subjected to single shear failure in the form of the shear band exhibiting linear strain-softening behavior beyond the peak stress was generalized as the nonlinear case.Prior to the peak stress,the Scott model was adopted to describe the nonlinear constitutive relation.The nonlinear strain-softening constitutive relation was back-calculated from the derived post-peak slope of the shortest ... |
| |
| Keywords: | concrete stress-strain curve nonlinearity strain-softening shear band size effect |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
