| 高强混凝土动态受拉特性的试验研究 |
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| 引用本文： | 孙吉书,窦远明,周戟,王继兴.高强混凝土动态受拉特性的试验研究[J].建筑科学,2011,27(7). |
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| 作者姓名： | 孙吉书 窦远明 周戟 王继兴 |
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| 作者单位： | 河北工业大学土木工程学院,天津,300401 |
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| 基金项目： | 国家自然科学基金资助项目(50878073) |
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| 摘 要： | 混凝土的动态力学特性与静态情况下有很大的不同,为了明确高强混凝土在动态条件下的受拉力学特性,本文应用MTS试验机,对C50混凝土在应变速率为10-5/s～10-2/s范围内进行单轴动态拉伸试验,系统研究了不同应变速率下混凝土的抗拉强度、弹性模量、峰值应变等抗拉力学特性,并分析了应变速率对高强混凝土抗拉强度、弹性模量等力学指标的影响规律。试验结果表明:混凝土抗拉强度、弹性模量随着应变速率的增加而增加,泊松比离散性比较大,增加趋势不明显,动态受拉应力应变曲线与静态相似。这些成果有利于完善混凝土的动态本构关系。
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| 关 键 词： | 混凝土 抗拉特性 强度 应变速率 试验研究 |
Experimental Study on the Dynamic Tensile Properties of High-Strength Concrete |
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| SUN Ji-shu,DOU Yuan-ming,ZHOU Ji,WANG Ji-xing.Experimental Study on the Dynamic Tensile Properties of High-Strength Concrete[J].Building Science,2011,27(7). |
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| Authors: | SUN Ji-shu DOU Yuan-ming ZHOU Ji WANG Ji-xing |
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| Affiliation: | SUN Ji-shu,DOU Yuan-ming,ZHOU Ji,WANG Ji-xing(School of Civil Engineering,Hebei University of Technology,Tianjin 300401,China) |
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| Abstract: | Mechanical properties of concrete under dynamic loads differ from those under static loads greatly.In order to investigate the dynamic tensile properties of high strength concrete,dynamic tensile tests of concrete specimens(C50) are carried out on MTS,with the uniaxial strain rate ranging from 10-5/s to 10-2/s.The tensile properties of concrete under different stain rates,which include tensile strength,elastic modulus and peak strain,are studied systematically.The rule of effect of strain rates on the tensi... |
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| Keywords: | concrete tensile property strength strain rate experimental study |
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