FRC连梁联肢剪力墙数值模拟及设计方法
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国家自然科学基金资助项目(50908187、51078305);长江学者和创新团队发展计划资助(PCSIRT);陕西省自然科学青年基金资助项目(2009JQ7013);西安建筑科技大学基础研究基金资助项目(JC0902)


Numerical Simulations and Design Method of Coupled Wall System with FRC Coupling Beams
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    摘要:

    运用有限元软件ABAQUS建立剪力墙数值模型,分别对2个对称双肢剪力墙试件和2个塑性铰区采用纤维增强混凝土(FRC)的悬臂剪力墙试件在低周反复荷载作用下的抗震性能进行数值计算,计算结果与试验结果比较吻合,表明该模型可较准确地分析FRC连梁联肢剪力墙构件在低周反复荷载作用下的抗震性能。利用所建立的数值模型,讨论了联肢墙中用FRC连梁替代普通混凝土连梁的优越性,并探讨了耦合率对FRC连梁联肢剪力墙抗震性能的影响。结果表明,用FRC替代普通混凝土作为连梁基体,可以显著提高联肢剪力墙结构的耗能能力和延性,增大其初始刚度,减缓刚度退化程度;随着联肢剪力墙耦合率的增加,联肢剪力墙的刚度和承载力提高,但当耦合率过大时?纬汕苛禾逑担峁沟难有院秃哪苣芰灾陆怠?

    Abstract:

    Using the software, ABAQUS, accurate simulations of seismic behavior of 2 coupled wall specimens and 2 cantilever structure wall specimens using high performance fiber reinforced concrete (FRC) in plastic hinge under quasi static cyclic loading were carried out. The analysis model proves to be effective with the accordance between results of computation and experiment, then it can be used to analyze the seismic behavior of coupled wall system with FRC coupling beams. By using the verified numerical model, the ability of FRC coupling beams instead of RC coupling beams to provide acceptable performance was discussed. In addition, the impact of coupling ratio on seismic behavior of coupled walls was studied. The results show that coupled walls in which FRC coupling beams are used instead of traditional RC beams have good energy dissipation and ductility, and its initial stiffness is increased and stiffness degradation is slow. And as the coupling ratio of coupled wall structures increases, the stiffness and strength increase. But if the coupling ratio is too large, the ductility and energy dissipation capacity will be significantly reduced.

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车佳玲,梁兴文,党争,邓明科. FRC连梁联肢剪力墙数值模拟及设计方法[J].土木与环境工程学报(中英文),2012,34(4):72-79. CHE Jialing, LIANG Xingwen, DANG Zheng, DENG Mingke. Numerical Simulations and Design Method of Coupled Wall System with FRC Coupling Beams[J]. JOURNAL OF CIVIL AND ENVIRONMENTAL ENGINEERING,2012,34(4):72-79.10.11835/j. issn.1674-4764.2012.04.012

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  • 在线发布日期: 2012-09-05
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