- 摘 要
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(1 奧雅納工程顧問, 深圳 518048; 2 天津大學建筑工程學院, 天津 300072)
[摘要]鋼筋混凝土剪力墻因其高效的剛度和抗震性能,被廣泛地應用于超高層建筑的豎向傳力和抗側體系中。對于超高層建筑結構,剪力墻在設防地震和罕遇地震作用下,易處于偏心受拉狀態(tài)。目前,偏心受拉墻肢的抗震性能研究很少,為了保證偏拉墻肢抗震設計安全合理,對處于偏心受拉狀態(tài)下的5片墻肢的抗側性能進行試驗研究,并采用LS-DYNA通用有限軟件進行數值模擬對比分析。試驗結果顯示,軸拉力影響混凝土剪力墻抗側破壞過程的裂縫分布和破壞形態(tài),降低混凝土剪力墻的承載力、位移延性、側向剛度和耗能能力;配置抗滑移鋼筋能提高受拉混凝土剪力墻的承載力、位移延性和耗能能力。LS-DYNA的數值模擬研究表明,墻肢在拉彎剪的共同作用下,裂縫的開展形式及最后破壞情況可以通過高級的有限元分析技術進行模擬,從而確保結構設計的安全性。
[關鍵詞]鋼筋混凝土剪力墻; 偏心受拉; 抗震性能; LS-DYNA
中圖分類號:TU318文獻標識碼:A文章編號: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
*奧雅納科研基金(IiA Funding)(9844)。
作者簡介:徐紫鵬,碩士,工程師,Email:zi-peng.xu@qq.com。