| 应变率对混凝土抗压特性的影响 |
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| 引用本文： | 肖诗云,林皋,逯静洲,王哲.应变率对混凝土抗压特性的影响[J].哈尔滨建筑大学学报,2002,35(5):35-39. |
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| 作者姓名： | 肖诗云 林皋 逯静洲 王哲 |
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| 作者单位： | 1. 大连理工大学土木水利学院,辽宁,大连,116024
2. 北方交通大学土木建筑学院,北京,110044 |
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| 基金项目： | 国家自然基金重点资助项目(59739180) |
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| 摘 要： | 在MTS伺服疲劳机上对混凝土试件进行动态受压试验，系统地分析和研究了混凝土屈服强度与内变量及混凝土极限抗压强度与内变量变化率之间的关系，混凝土抗压强度与变形特性与应变率之间的关系，试验结果表明：随着塑性应变的增加，混凝土屈服强度增加，达到极限抗压强度后，屈服强度开始降低；随着塑性应变率的增加，混凝土极限抗压强度发生了明显的增加，但随着塑性应变速率的增加，强度的增加值变小；随着应变率的增加，混凝土的弹性模量增加；但混凝土泊松比随着应变率的增加没有明显的改变。
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| 关 键 词： | 应变率 屈服强度 抗压强度 内变量 变形特性 泊松比 |
| 文章编号： | 1006-6780(2002)05-0035-05 |
| 修稿时间： | 2001年12月12 |
Effect of strain rate on dynamic behavior of concrete in compression |
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| XIAO Shi-yun ,LIN Gao ,LU Jing-zhou ,WANG Zhe.Effect of strain rate on dynamic behavior of concrete in compression[J].Journal of Harbin University of Civil Engineering and Architecture,2002,35(5):35-39. |
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| Authors: | XIAO Shi-yun LIN Gao LU Jing-zhou WANG Zhe |
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| Affiliation: | XIAO Shi-yun 1,LIN Gao 1,LU Jing-zhou 1,WANG Zhe 2 |
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| Abstract: | A dynamic experiment of concrete subjected to various compressive strain rate is carried on the ser-vo fatigue machine and the relationship between yield strength and internal variant and relationship between strength increasing factor and rate of internal variant are analyzed.Results show that yield strength increase with increasing of plasticity strain rate but it decrease after it exceeds the maximum strength,strength increas-ing factor increase with increasing of plasticity strain rate;Elastic modulus increases with the increasing of strain rate but Poisson's ratio of concrete is less sensitive to the strain rate. |
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| Keywords: | strain rate yield strength compressive strength internal variant deformation behavior Pois son's ratio |
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