| 考虑变形影响的钢筋混凝土圆柱受剪承载力计算模型 |
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| 引用本文： | 张勤,邴鹏,韦宗延,贡金鑫. 考虑变形影响的钢筋混凝土圆柱受剪承载力计算模型[J]. 重庆大学学报(自然科学版), 2017, 40(11): 72-82. DOI: 10.11835/j.issn.1000-582X.2017.11.009 |
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| 作者姓名： | 张勤 邴鹏 韦宗延 贡金鑫 |
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| 作者单位： | 1. 河海大学土木与交通学院,南京210098;大连理工大学海岸和近海工程国家重点实验室,大连116024;2. 大连理工大学海岸和近海工程国家重点实验室,大连,116024;3. 河海大学土木与交通学院,南京,210098 |
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| 基金项目： | 国家自然科学基金资助项目（51678104，51508154）；江苏省自然科学基金资助项目（BK20150803）；中国博士后科学基金面上项目（2015M581711）；国家重点实验室开放基金项目（LP1515）。 |
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| 摘 要： | 准确计算钢筋混凝土(RC)圆柱的受剪承载力是进行延性抗震设计的关键,可有效防止脆性剪切和弯剪破坏模式发生。基于已有的RC圆柱拟静力试验结果,分析了RC圆柱的地震破坏模式和受剪承载力确定方法,在理论分析的基础上提出了考虑变形(位移延性)影响的RC圆柱受剪承载力计算模型,并与现有模型进行了比较。研究结果表明,地震作用下RC圆柱的受剪承载力随塑性铰区变形的增加而减小;弯剪破坏模式下,RC圆柱的受剪承载力取决于塑性铰区剪切破坏发生时对应的水平荷载而非骨架曲线上的峰值荷载;所提出的模型能有效反映变形对RC圆柱受剪承载力的影响,计算结果与试验数据吻合较好,可用于不同地震破坏模式RC圆柱受剪承载力计算。
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| 关 键 词： | 钢筋混凝土圆柱 弯剪破坏 受剪承载力 位移延性 |
| 收稿时间： | 2017-05-28 |
Shear strength model including the effects of deformation for the circular reinforced concrete columns |
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| ZHANG Qin,BING Peng,WEI Zongyan and GONG Jinxin. Shear strength model including the effects of deformation for the circular reinforced concrete columns[J]. Journal of Chongqing University(Natural Science Edition), 2017, 40(11): 72-82. DOI: 10.11835/j.issn.1000-582X.2017.11.009 |
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| Authors: | ZHANG Qin BING Peng WEI Zongyan GONG Jinxin |
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| Affiliation: | College of Civil and Transportation Engineering, Hohai University, Nanjing 210098, P. R. China;State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, Liaoning, P. R. China,State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, Liaoning, P. R. China,College of Civil and Transportation Engineering, Hohai University, Nanjing 210098, P. R. China and State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, Liaoning, P. R. China |
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| Abstract: | Accurate calculation of shear strength of reinforced concrete (RC) circular columns plays a key role in the ductile seismic design, which can effectively prevent the occurrence of brittle shear and flexure-shear failure. Based on the existing quasi-static test results of RC circular columns, the seismic failure modes and the method for determining the shear strength capacity of RC circular columns are analyzed. On the basis of theoretical analysis, a shear strength model of RC circular column considering the effects of inelastic deformation (displacement ductility) is proposed and compared with the existing model. The results show that the shear strength capacity of RC circular columns decreases with the increase of deformation in the plastic hinge region under seismic loading. The shear strength capacity of flexural-shear failure columns depends on the lateral load corresponding to the shear failure point of the plastic hinge region rather than peak lateral load of the skeleton curve. The proposed model is able to effectively reflect the effects of deformation on the shear strength capacity of RC circular columns. And the results are in good agreement with the experimental data and can be used to predict the shear strength capacity of RC circular columns with different failure modes under seismic excitations. |
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| Keywords: | reinforced concrete circular column flexure-shear failure shear capacity displacement ductility |
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