基于性能的空间结构抗震设计研究现状与关键问题

Research status and key issues of performance-based seismic design of spatial structures

基于性能的抗震设计是结构抗震设计的发展趋势。以基于性能的结构抗震设计研究内容和发展趋势为背景,从地震危险性分析、结构反应性能参数确定、结构抗震性能水平划分及性能目标确定、基于性能的抗震设计方法等四个方面对国内外基于性能的空间结构抗震设计研究现状进行了总结。依据有效性和充分性原则研究确定适合于不同类型空间结构的标量式、向量式或其它形式的地震动参数,提出了空间结构反应性能参数确定中的关键问题。空间结构抗震性能水平划分研究中需要综合考虑结构及非结构构件因素,通过数值仿真和试验相结合的研究手段确定能够合理划分其性能水平的自定义综合式标量指标、向量式指标或者两者结合的指标,空间结构性能目标确定及抗震设计方法研究应基于可靠度理论及"投资-效益"准则。

The performance-based design is the development trend of seismic design.Based on the research topics and development trends of performance-based seismic design,the state-of-the-art of performance-based seismic design for spatial structures is provided,with subjects on seismic hazard analysis,structural response analysis,classification of performance levels and determination of performance objectives,performance-based seismic design methodology.Scalar,vector and other type of ground motion parameters for various types of spatial structures should be determined by efficiency and sufficiency principles,and the key issues in the research of seismic behavior of spatial structures are presented.In classifying the seismic performance levels of spatial structures,the structural and non-structural elements should be considered,and the numerical simulation and experimental methods should be used to determine the user-defined comprehensive index,vector-valued index or the index combining these two forms.The selection of performance objectives and the design methodology research should be based on the reliability theory and cost-effectiveness criterion.