摘要
为改进传统钢筋混凝土剪力墙的抗震性能,提出一种内置优化钢板-钢筋混凝土组合剪力墙。综合考虑多维加载和满应力准则的设计原则,当面内方向为主要抗震方向时,布置X形优化钢板;当面外方向为主要抗震方向时,布置三角形优化钢板;当斜向成为主要抗震方向时,同时布置X形优化钢板和三角形优化钢板。对所设计的7个典型剪力墙进行低周往复加载试验,对比分析剪力墙的滞回曲线、骨架曲线、延性、刚度退化及应变演变等性能指标,并进行损伤评估。结合有限元软件进行变参数分析,对比不同形式钢板的应变分布状态。结果表明:相较于传统钢筋混凝土剪力墙,内置优化钢板-钢筋混凝土组合剪力墙在多维受力时均具有较高的承载能力、变形能力和承载刚度,能有效降低剪力墙损伤程度,使得剪力墙极限变形更大;与矩形钢板相比,优化钢板能在各加载角度下达到满应力状态,具有更好的经济性和实用性。考虑剪力墙在多维受力状态下的抗震性能存在明显的差异,建议特别关注其面外及斜向受力时的状态。
In order to improve the seismic performance of the traditional reinforced concrete shear wall,an embedded optimized steel plate-reinforced concrete composite shear wall was proposed.Considering the design principle of multi-dimensional loading and full stress criterion,an X-shaped optimized steel plate was arranged when the in-plane direction was the main seismic direction.When the out-of-plane direction was the main seismic direction,a triangular optimized steel plate was arranged.When the oblique direction became the main seismic direction,the X-shaped optimized steel plate and the triangular optimized steel plate were arranged at the same time.The hysteretic curves,skeleton curve,ductility,stiffness degradation and strain evolution of seven typical shear wall specimens were compared through cyclic loading test,and the damage assessment was carried out.The strain distributions of steel plates were compared by using finite element software to analyze the variable parameters.The results show that compared with the traditional reinforced concrete shear wall structure,the embedded optimized steel plate-reinforced concrete composite shear wall structure has higher bearing capacity,deformation capacity and bearing stiffness under multi-dimensional loading,which can effectively reduce the damage degree of the shear wall and improve its ultimate deformation capacity.Compared with the rectangular steel plate,the optimized steel plate proposed in this paper can achieve the full stress state at all loading angles,which has better economy and practicability.There are obvious differences in the seismic performance of shear walls under multi-dimensional loading,and special attention should be paid to their performance under out-of-plane loading and oblique loading conditions.
作者
程扬
何浩祥
孙澔鼎
李金虎
CHENG Yang;HE Haoxiang;SUN Haoding;LI Jinhu(Beijing Key Laboratory of Earthquake Engineering and Structural Retrofit,Beijing University of Technology,Beijing 100124,China)
出处
《建筑结构学报》
北大核心
2025年第2期141-155,共15页
Journal of Building Structures
基金
国家自然科学基金面上项目(52378469)。
关键词
组合剪力墙
优化钢板
内置钢板
拟静力试验
有限元分析
抗震性能
composite shear wall
optimized steel plate
embedded steel plate
pseudo static test
finite element analysis
seismicperformance
