Multi-hazard resilient structural system adopting strong structural spines and damped-pin joints

本研究旨在开发一种采用强结构刺和阻尼销节点的多灾害弹性结构体系。在第一年，提出了两种阻尼销节点，以提高典型的强脊柱结构和规则的弯矩框架结构的回弹能力。通过循环加载试验和有限元分析，阐明了阻尼销节点的结构特性。这些阻尼销节点可以应用于强梁结构的集热器端部和弯矩框架结构的梁柱连接。其中一种建议的节点使用杠杆臂构件将阻尼器放置在垂直结构构件而不是水平构件中，从而提高了阻尼器布置的灵活性。另一种方案引入双级屈服阻尼器，实现结构的多级振动控制。在理论分析的基础上，提出了两种阻尼节点的刚度和强度评价方法。通过循环加载试验和计算机模拟，验证了所提出节点及评价方法的可行性。通过不同地震动输入条件下建筑物模型的地震反应分析，验证了双级屈服阻尼器的有效性。此外，通过数值分析，探讨了降低强脊梁结构柱基础损伤的两种解决方案，即增加第一层高度和提高结构脊梁销基础位置。

This research aims to develop a multi-hazard resilient structural system adopting strong structural spines and damped-pin joints. In the first year, two types of damped-pin joints were proposed to enhance resilience of typical strong-spine structures as well as regular moment frame structures. The structural characteristics of the damped-pin joints were clarified through cyclic loading tests and finite element analysis. Those damped-pin joints can be applied at the collector ends in the strong-spine structures and beam-to-column connections in moment frame structures. One of the proposed joints uses lever-arm members to place dampers in the vertical structural members rather than the horizontal members, which enhances the flexibility of damper arrangements. The other proposal introduces double-stage yield dampers to realize multi-stage vibration control of the structure. Stiffness and strength evaluation methods for the two types of damped joints were developed based on theoretical analysis. Feasibility of the proposed joints and the evaluation methods were verified by cyclic loading tests and computer simulation. Efficiency of the double-stage yield dampers were also verified by seismic response analysis of building models under various ground motion inputs. Additionally, two solutions to reduce column base damage in the strong-spine structures have been discussed through numerical analyses, which are increasing the first-story height and raising the pin base location of the structural spines.