钢板外包混凝土组合剪力墙协同工作机理及设计方法

Composite steel plate shear wall(C-SPW) consisting of steel plate with reinforced concrete encasement on one or both sides of the plate using mechanical connectors such as shear studs is an efficient lateral load resisting system with significant ductility and stiffness and energy dissipation capacity. . Because C-SPW is relatively new structure system and a few researches conducted on it, previous researches focus mainly on its seismic behavior, few researches pay attention to design method of it, design guidelines for C-SPW was not completed yet.. This planning research attempts to study the interaction between steel plate and shear studs and concrete encasement, study the failure mechanism of C-SPW. Using numerical simulating , analyses the sharing shear ratio of steel plate and concrete panel, analyses the transferring shear ratio of shear studs and concrete bonding , analyses the shear distribution in the group of shear studs and the shear force in shear studs under design load. Using testing and numerical simulating, study the thickness demand of concrete panel which can provide adequate stiffening to prevent overall and local buckling of the steel plate prior to its shear yielding. Analyses the tension force in the shear studs under design load and ultimate load of C-SPW by numerical simulating. Based on the research results, proposing the thickness demand of concrete panel，proposing design rules for combining the yield stress of the steel plate and the reinforced concrete panel，proposing the design shear force and tension force of shear studs, proposing an adequate design methods for C-SPW,putting the using of which forward.

钢板外包混凝土组合剪力墙(C-SPW）侧向刚度大、延性好、耗能能力强，是一种高效的新型抗侧力体系。国内外对C-SPW进行了数量不多的研究工作，且主要集中在C-SPW的滞回性能，对其设计方法的研究很少，至今对此结构还没有形成完整的设计方法。. 本项目拟研究钢板、栓钉、外包混凝土板的协同工作机理和C-SPW破坏模式；数值分析钢板与混凝土板分担剪力的比例,钢板与混凝土板粘结、焊接栓钉传递剪力的比例,栓钉群中剪力的分布模式，设计荷载下栓钉所受剪力；试验研究、数值分析对钢板屈曲提供约束的外包混凝土板厚需求；试验研究、数值分析钢板有屈曲趋势时栓钉所受的拉力及C-SPW弹塑性破坏阶段栓钉所受拉力。期望基于本研究成果，提出外包混凝土板厚需求、组合板受剪设计承载力、栓钉设计剪力与拉力需求计算公式，完善C-SPW的设计方法，推动这一高效抗侧力体系的工程应用。

钢板外包混凝土组合剪力墙(C-SPW）侧向刚度大、耗能能力强，是一种高效的抗侧力构件。国内外对C-SPW的研究主要集中于滞回性能，对其设计方法的研究很少，至今对此结构还没有形成完整的设计规定，制约了其工程应用。. 本项目采用试验和有限元模拟相结合的方法研究了双面、单面外包混凝土C-SPW在单调侧向荷载、循环侧向荷载下的承载机理、各组件的协同工作。.建立了经试验验证的新颖C-SPW有限元模型，用带翼缘板的梁单元模拟边缘构件对混凝土板的挤压，可考虑钢墙板、混凝土板及栓钉间的相互作用。揭示了单调及循环荷载下C-SPW内嵌钢板塑性屈曲后的抗剪机理、承载力劣化。分析了钢板厚度、栓钉间距、栓钉直径、混凝土板厚度、配筋率、混凝土强度对C-SPW性能的影响。提出了单调荷载下层间侧移0.4%内保证钢板不发生屈曲的混凝土板厚需求计算公式、开方形洞口C-SPW承载力计算公式及栓钉剪力、拉力、弯矩需求计算公式。利用内嵌钢板塑性屈曲后面内受剪与不完整屈曲拉力场作用的联合抗剪，提出了循环荷载下层间侧移2%内保证墙板承载力不低于峰值承载力85%时对应的混凝土板厚需求计算公式及栓钉剪力需求计算公式。