双钢板波形组合墙受力机理及设计理论研究

This project proposes a new type of concrete-infilled double steel corrugated-plate walls (CDSCWs), and investigates its failure mechanism and design method. The CDSCW consists of two steel corrugated-plates interconnected through high-strength bolts, and the spacing between the two steel corrugated-plates is filled with concrete. Additionally, two vertical boundary elements are assigned at both sides of the CDSCW. The CDSCWs would possess outstanding load-carrying efficiency and excellent seismic performance owing to the effective integration among the steel corrugated-plates, infilled-concrete and high-strength bolts. Meanwhile, pre-fabrication of the CDSCWs can be achieved with higher production efficiency as well as fulfilling the residential housing requirements because of convenient construction and fabrication techniques. The application of CDSCWs would promote the development of steel-structure residential housing in the near future. This project will conduct a comprehensive and in-depth study on the failure mechanism of CDSCWs with theoretical analysis, numerical simulation and experimental investigation. The research contents include the optimized size of corrugated-plates, the load-carrying capacity and design method of the cross-sectional strength of CDSCWs under combined compressive, bending and shearing actions, the overall stability and limb stability behavior and design method of CDSCWs under combined compressive and bending actions, the hysteretic performance and constructional detailing of CDSCWs, and design method and feasible types of connections. The research findings of this project would provide guidance and fundamentals for the design and application of CDSCWs in engineering practice.

本项目将提出一类新型双钢板波形组合墙，研究其破坏机理和设计理论。双钢板波形组合墙将两块波形钢板通过高强螺栓对拉连接，并在钢板形成的空腔内浇筑混凝土，同时在侧边设置竖向边缘加强构件。波形钢板、内筑混凝土和对拉螺栓的有机结合所形成的显著组合效应，使得波形组合墙具有高承载效率和优越的抗震性能，同时其整体构造和制作工艺所能实现的装配化、高生产效率和易于满足住宅功能要求等特点，将推动钢结构住宅建筑的健康发展。项目将采用理论分析、数值模拟、试验研究相结合的方式，对双钢板波形组合墙的受力机理进行全面、深入的研究，内容包括确定波形钢板板型和优化尺寸、压弯剪组合作用下的截面强度承载性能及设计理论、压弯组合作用下的整体稳定和分肢稳定承载性能及设计理论、滞回性能及抗震构造措施以及连接节点的构造型式和承载力计算等。项目研究成果可为双钢板波形组合墙的设计和应用提供依据和指导。

本项目采用了理论分析、数值研究和试验研究相结合的方式，对双钢板波形组合墙的破坏机理和设计理论展开了深入而全面的研究。首先，对波形钢板板型尺寸进行了优化分析，综合考虑波形钢板承载性能、组合墙造价和可施工性等因素，为工程设计中波形的选定提供了设计建议。其次，本项目对双钢板波形组合墙的截面强度承载性能展开了研究，重点考虑了波形钢板的局部屈曲性能。对波形钢板、波形部分混凝土和边缘构件各自的承载性能，以及它们的协同工作性能进行了系统分析。其中还考虑了剪力对截面强度承载力的削弱作用，得到了相应的压弯设计曲线。之后，本项目对双钢板波形组合墙的整体稳定性能进行了研究。分别研究了其在轴压、弯曲工况下的稳定性能，并得到了平面外整体稳定承载力计算的压弯设计曲线。采用同样的方法研究了四边简支墙肢和三边简支一边自由墙肢的稳定性能，建立了墙肢稳定承载力设计方法。然后，本项目对双波形钢板组合墙在水平低周往复荷载作用下的滞回特性、延性和破坏特征进行试验研究。揭示了轴压比、剪跨比、螺栓间距等各关键变量对双钢板波形组合墙抗震性能的影响。最后，本项目对双钢板波形组合墙的节点展开了研究，提出了波形钢板组合墙的贴板式墙梁节点的设计方法。通过与试验研究结果对比可见，双钢板波形组合墙的设计方法具有足够的可靠性和安全性。本项目的研究成果可以为双钢板波形组合墙的设计和应用提供依据和指导。