基于整体可靠度的网壳结构性能化抗震设计理论研究

Large-span spacial reticulated shells are utilized widely and developed rapidly due to the good integrity, the light weight, easy assembly and aesthetic beauty, etc. However, the lagged anti-seismic theory limit the further development of reticulated shells. Therefore, on the basis of previous studies on failure mechanism of reticulated shells under severe earthquakes, the performance-based seismic design theory of reticulated shells with the consideration of complex effects is investigated in detail. The main contents of this study includes: i) ground motion and structural modeling uncertainty analysis; ii) Seismic fragility analysis on the reticulated shells with the consideration of complex effects; iii) Probabilistic seismic risk assessment of reticulated shells with the consideration of complex effects;iv)structural experiments on the dynamic performances and failure characteristics of reticulated shells with the consideration of complex effects. This project is based on the seismic reliability theory and performance-based seismic design theory. By using the method of theoretical analysis and experimental research, the reliability analysis of the full probability of reticulated shells is realized. The damage assessment method, earthquake risk assessment criteria and multilevel performance-base seismic design method of reticulated shells with the consideration of complex effects will be established. The new generation of the theoretical framework of performance-based seismic design of reticulated shells will be established and improved by this research.

大跨空间网壳结构因其具有整体受力合理、可覆盖空间大、建筑造型优美、用料经济等特点而得到日益广泛的应用。然而，网壳结构抗震理论的滞后成为制约其进一步超越发展的关键问题。为此，申请者以前期网壳结构强震失效机理研究为基础，对网壳结构性能化抗震设计理论展开深入系统的研究，主要内容包括：（1）地震动强度参数与不确定性分析；（2）考虑复杂效应影响的网壳结构地震易损性分析；（3）考虑复杂效应影响的网壳结构概率地震风险评估；（4）考虑复杂效应影响的网壳结构耦合系统试验研究。本项目以网壳结构整体抗震可靠度理论和性能化抗震设计理论为研究主线，采用理论分析与试验研究相结合的研究方法，实现网壳结构全概率的可靠度分析，建立考虑复杂效应影响的网壳结构整体损伤评估方法、地震概率风险评估准则及多水准性能化抗震设计方法，搭建并完善新一代空间网壳结构性能化抗震设计理论框架。

大跨空间网壳结构因其具有整体受力合理、可覆盖空间大、建筑造型优美、用料经济等特点而得到日益广泛的应用。然而，网壳结构抗震理论的滞后成为制约其进一步超越发展的关键问题。为此，申请者以前期网壳结构强震失效机理研究为基础，对网壳结构性能化抗震设计理论展开深入系统的研究，主要内容包括：（1）地震动强度参数与不确定性分析；（2）考虑复杂效应影响的网壳结构地震易损性分析；（3）考虑复杂效应影响的网壳结构概率地震风险评估。本项目开展网壳结构概率地震需求分析、概率抗震能力分析、概率地震易损性分析以及地震损失评估，实现网壳结构全概率的可靠度分析，建立考虑复杂效应影响的网壳结构整体损伤评估方法、地震概率风险评估准则及多水准性能化抗震设计方法。本项目力争在大跨空间网壳结构整体抗震可靠度设计理论和性能化抗震设计理论研究中取得突破，为建立大跨空间网格结构抗震设计理论及风险评估理论提供大量详实和直接的参考材料，为我国大跨空间网格结构在地震区的建设与发展提供充分的理论支持。