| 经历荷载历史后的混凝土动态抗压试验 |
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| 引用本文： | 刘俊飞,田汉儒,孙吉书. 经历荷载历史后的混凝土动态抗压试验[J]. 低温建筑技术, 2012, 34(11): 1-3 |
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| 作者姓名： | 刘俊飞 田汉儒 孙吉书 |
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| 作者单位： | 1. 河北工业大学土木工程学院,天津,300401
2. 长安大学建筑工程学院,西安,710061 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 为了研究荷载历史对混凝土动态抗压特性的影响,应用MTS试验机对经历了30%极限抗压强度荷载历史后的C30混凝土试件进行了应变速率为1×10-5/s～1×10-2/s的单轴动态抗压试验。试验结果表明:经历荷载历史后,混凝土的动态抗压特性发生了一定程度的变化;与直接加载相比,经历荷载历史后的混凝土平均极限抗压强度、弹性模量降低了,峰值应变没有明显变化;抗压强度、弹性模量随着应变速率的增大而增大,峰值应变正好相反。
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| 关 键 词： | 荷载历史 混凝土 应变速率 抗压特性 试验研究 |
EXPERIMENTAL STUDY ON DYNAMIC COMPRESSIVE PROPERTIES OF CONCRETE EXPERIENCED LOADING HISTORY |
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| LIU Jun-fei , TIAN Han-ru , SUN Ji-shu. EXPERIMENTAL STUDY ON DYNAMIC COMPRESSIVE PROPERTIES OF CONCRETE EXPERIENCED LOADING HISTORY[J]. Low Temperature Architecture Technology, 2012, 34(11): 1-3 |
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| Authors: | LIU Jun-fei TIAN Han-ru SUN Ji-shu |
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| Affiliation: | 1. School of Civil Engi. , Hebei Univ. of Technology, Tianjin 300401, China ; 2. School of Civil Engi. , Chang＇ an Univ. ,Xi＇ an 710061 ,China) |
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| Abstract: | In order to study the impact of the loading history of dynamic compressive properties of concrete, compressive experiments of concrete specimens（C30） experienced a 30% ultimate compressive strength loading history are carried out on MTS, with the uniaxial strain rate ranging from 100^-5/s to 10^-2/s. The test results show that after the loading history, the dynamic compressive properties of con- crete has a certain degree of change; compared with the direct load, the average ultimate compressive strength and elastic modulus of concrete would decrease after the loading history, but the peak strain did not change significantly;compressive strength and elastic modulus would increase with the strain rate in- creasing, but the peak strain is just the opposite. |
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| Keywords: | loading history concrete strain rate compressive properties experimental study |
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