| 应变率对钢筋混凝土柱动态特性的影响 |
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| 引用本文： | 王德斌,李宏男.应变率对钢筋混凝土柱动态特性的影响[J].地震工程与工程振动,2011,31(6):67-72. |
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| 作者姓名： | 王德斌 李宏男 |
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| 作者单位： | 大连理工大学建设工程学部,辽宁大连,116024 |
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| 基金项目： | 国家自然科学基金重大研究计划重点项目，国家地震专项项目，高等学校学科创新引智计划项目 |
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| 摘 要： | 文中以OPENSEES有限元软件为工具,利用基于柔度法的钢筋混凝土柱纤维单元,考虑钢筋与混凝土材料的应变率效应,对钢筋混凝土柱进行了动态响应分析,并用试验结果验证了文中方法的正确性.通过数值模拟,研究了钢筋混凝土柱在不同轴压比、不同混凝土强度、不同纵筋率条件下的动态力学特性.结果表明,随着轴压比的提高,钢筋混凝土柱的应...
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| 关 键 词： | 钢筋混凝土柱 应变率 纵筋率 混凝土强度 轴压比 |
Effects of strain rate on dynamic behavior of reinforced concrete column |
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| WANG Debin,LI Hongnan.Effects of strain rate on dynamic behavior of reinforced concrete column[J].Earthquake Engineering and Engineering Vibration,2011,31(6):67-72. |
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| Authors: | WANG Debin LI Hongnan |
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| Institution: | (Faculty of Infrastructure Engineering,Dalian University of Technology,Dalian 116024,China) |
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| Abstract: | This paper studies the influence of strain rate on the reinforced concrete columns.The OPENSEES,a finite element analysis software,is employed to simulate the reinforced concrete column fiber model based on the flexibility method.Through numerical simulations,it is validated that the effect of strain rate is magnified along with the increasing axial load ratio;the sensitivity of the strain rate effect is decreased when the reinforced concrete strength or longitudinal reinforced ratio increases.Furthermore,the dynamic behavior of the reinforced concrete column is considered when it is subjected to earthquake.It is shown that the mechanical properties of the reinforced concrete column is similar to those under monotonic loading.It is implied that the loading rate is a significant factor in the dynamic behavior of the reinforced concrete column.In the conventional design of reinforced concrete columns,the failure load under the condition of monotonic loading can be increased by about 10 percent,even more than 20 percent when considering the strain rate of materials.Therefore,the study on strain rate effect for reinforced concrete column is important to structure damage under earthquake. |
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| Keywords: | reinforced concrete column strain rate longitudinal reinforced ratio concrete strength axial load ratio |
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