可更换剪切型耗能梁段-高强钢框筒结构体系抗震性能与设计方法研究

In order to solve the scientific problems about the poor seismic energy dissipation and repairable capacities of the traditional steel framed-tube structure, the high strength steel fabricated framed-tube structure with replaceable shear link (HSS-SLF) is purposed, which combines the advantages of replaceable shear link, framed-tube structure and high strength steel. The failure mechanism and energy dissipation properties of HSS-SLF are studied by means of the experimental, finite element and theoretical analysis. The influence of the parameters to the load-bearing capacity, lateral stiffness, ductility, energy dissipation and repairable capacities of HSS-SLF are researched. The proper forms, steel properties and the construction measures of replaceable shear link are selected according the study. The restoring force model and simplified analysis method of HSS-SLF are also researched. The matching relationships between design parameters of shear link and performance of HSS-SLF are studied. Moreover, the performance-based seismic design methods and construction measures of HSS-SLF are purposed. The research results will help the development of seismic theory and design methods in the seismic field.

针对传统钢框筒结构地震耗能较差和震后修复能力的不足，结合可更换剪切型耗能梁段优良的非弹性耗能和震后易修复能力、钢框筒结构较大的抗侧刚度、高强钢强度高节约材料的优点，提出可更换剪切型耗能梁段-高强钢框筒结构。通过试验研究、数值模拟和理论分析，研究该结构在水平地震下的破坏机理和耗能机制；探讨影响该结构承载力、抗侧刚度、延性、耗能能力和震后修复能力的主要参数及其影响规律；确定适用于该结构的耗能梁段形式及其钢材类型、构造细节；建立该结构的恢复力模型并提出弹塑性简化分析方法；确定耗能梁段设计参数与整体结构的合理匹配关系；确定抗震设计指标，提出该结构基于性能的抗震设计方法和构造建议等。研究成果可推动我国高层钢结构抗震体系理论和设计方法的发展，并用于指导工程实际。

针对传统钢框筒结构地震耗能较差和震后修复能力的不足，本项目结合可更换剪切型耗能梁段优良的非弹性耗能和震后易修复能力、钢框筒结构较大的抗侧刚度、高强钢强度高节约材料的优点，提出可更换剪切型耗能梁段-高强钢框筒结构。通过试验研究、数值模拟和理论分析，研究了该结构在水平地震下的破坏机理、耗能机制以及耗能梁段的可更换能力；探讨了影响该结构承载力、抗侧刚度、延性、耗能能力和震后修复能力的主要参数及其影响规律；确定了适用于该结构的耗能梁段形式、耗能梁段布置方式、耗能梁段钢材类型及构造细节；提出了该结构的弹塑性简化分析方法，并且建立了该结构的简化数值分析模型；确定了该结构的弹塑性侧向力分布模式以及抗震设计指标，提出了该结构基于性能的抗震设计方法和构造建议等。