土木工程学报  2016, Vol. 49 Issue (4): 31-39    
  结构工程 本期目录 | 过刊浏览 | 高级检索 |
用于钢筋混凝土连梁地震反应分析的考虑非线性剪切的纤维梁单元II:应用与讨论
丁 然 聂建国 陶慕轩
清华大学土木工程安全与耐久教育部重点实验室, 北京 100084
A fiber beam-column element considering nonlinear shear effects for seismic response analysis of reinforced concrete coupling beams II:application and discussion
Ding Ran  Nie Jianguo  Tao Muxuan
Key Laboratory of Civil Engineering Safety and Durability of the Ministry of Education,  Tsinghua University, Beijing 100084, China
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摘要 将所开发的适用于普通配筋RC连梁非线性地震反应分析的纤维梁单元应用于构件分析,对国内外共16根连梁试件进行模拟,结果表明数值模拟结果与试验结果吻合良好,证明了该模型的准确性。通过对破坏模式和各变形分量的分析,进一步对连梁的变形机制及影响因素进行了探讨。随后利用大量试验数据对剪切承载力、开裂后剪切刚度、极限曲线等连梁关键参数的计算公式进行验证,并与其他学者提出的公式进行对比讨论。结果表明所提公式精度较高,更适用于普通配筋RC连梁。最后通过一组复杂极端应力路径对所开发单元的数值稳定性进行了验证。经过验证可知,所提出的连梁计算单元兼具高效性和准确性且建模方便,同时还具备数值稳定性好的特点,为体系非线性地震反应分析提供了一种新的手段。
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丁 然 聂建国 陶慕轩
关键词 RC连梁地震反应分析变形机制剪切承载力开裂后剪切刚度剪切极限曲线数值稳定性    
Abstract:The fiber beam-column element developed for nonlinear analysis of conventional RC coupling beams is applied to the simulation of 16 coupling beam specimens. The numerical results correlate well with the test results,which validates the accuracy of the model. By analyzing the failure modes and various deformation components, the deformation mechanism of coupling beams and its influencing factors are discussed. Then, based on a large number of test results, the formulas for shear bearing capacity, shear stiffness after diagonal cracking and limit curve of conventional RC coupling beams are verified and compared to those suggested by other researchers. It is shown that the formulas proposed in this study are more accurate and thus more suitable for conventional RC coupling beams. Finally, the numerical stability of the developed element is examined and verified based on some numerical tests with complex and extreme loading paths. It can be demonstrated from all the validation that the model proposed in this paper provides a new tool for seismic response analysis of conventional RC coupling beams and high-rise structures due to its accuracy, efficiency and convenient modeling procedure, as well as good numerical stability.
Key wordsRC coupling beam    seismic analysis    deformation mechanism    shear bearing capacity    shear stiffness after diagonal cracking    shear limit curve    numerical stability
    
引用本文:   
丁 然 聂建国 陶慕轩. 用于钢筋混凝土连梁地震反应分析的考虑非线性剪切的纤维梁单元II:应用与讨论[J]. 土木工程学报, 2016, 49(4): 31-39.
Ding Ran Nie Jianguo Tao Muxuan. A fiber beam-column element considering nonlinear shear effects for seismic response analysis of reinforced concrete coupling beams II:application and discussion. 土木工程学报, 2016, 49(4): 31-39.
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