- 摘 要
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(1 奥雅纳工程顾问, 深圳 518048; 2 天津大学建筑工程学院, 天津 300072)
[摘要]钢筋混凝土剪力墙因其高效的刚度和抗震性能,被广泛地应用于超高层建筑的竖向传力和抗侧体系中。对于超高层建筑结构,剪力墙在设防地震和罕遇地震作用下,易处于偏心受拉状态。目前,偏心受拉墙肢的抗震性能研究很少,为了保证偏拉墙肢抗震设计安全合理,对处于偏心受拉状态下的5片墙肢的抗侧性能进行试验研究,并采用LS-DYNA通用有限软件进行数值模拟对比分析。试验结果显示,轴拉力影响混凝土剪力墙抗侧破坏过程的裂缝分布和破坏形态,降低混凝土剪力墙的承载力、位移延性、侧向刚度和耗能能力;配置抗滑移钢筋能提高受拉混凝土剪力墙的承载力、位移延性和耗能能力。LS-DYNA的数值模拟研究表明,墙肢在拉弯剪的共同作用下,裂缝的开展形式及最后破坏情况可以通过高级的有限元分析技术进行模拟,从而确保结构设计的安全性。
[关键词]钢筋混凝土剪力墙; 偏心受拉; 抗震性能; LS-DYNA
中图分类号:TU318文献标识码:A文章编号:1002-848X(2017)14-0080-08
Seismic performance test and numerical simulation study of reinforced concrete shear wall under tensile loading
Xu Zipeng1, Lin Hai1, Xin Yingpei1, Zhen Shengwei1, Zhao Hailong2
(1 Arup, Shenzhen 518048, China; 2 School of Civil Engineering, Tianjin University, Tianjin 300072, China)
Abstract:Because of its high stiffness and seismic performance, reinforced concrete shear wall is widely used in vertical transmission and lateral resistance system of super high-rise buildings. For the super high-rise building structures, the shear wall is easy to be subjected to eccentric tensile state under the action of seismic fortification and rare earthquake. At present, there is little research on seismic performance of eccentric tensile shear wall. In order to ensure the safe and reasonable seismic design of eccentric tensile shear wall, test study was conducted on lateral performance of 5 pieces of shear walls under eccentric tensile state, and the numerical simulation analysis was conducted by LS-DYNA finite software. The test results show that the axial tensile force impacts crack distribution and failure mode of reinforced concrete shear wall in lateral failure process, reduces the bearing capacity, displacement ductility, lateral stiffness and energy dissipation capacity of reinforced concrete shear wall; configuration of anti-slip steel rebar can improve the bearing capacity, displacement ductility and energy dissipation capacity of tensile reinforced concrete shear wall. LS-DYNA numerical simulation study shows that crack form and final failure condition of the shear wall under the common action of bending and shear forces can be simulated by the advanced finite element analysis technology, so as to ensure the safety of structural design.
Keywords:reinforced concrete shear wall; eccentric tensile; seismic performance; LS-DYNA
*奥雅纳科研基金(IiA Funding)(9844)。
作者简介:徐紫鹏,硕士,工程师,Email:zi-peng.xu@qq.com。