网壳结构基于性能的地震概率风险评估关键问题研究

项目名称： 网壳结构基于性能的地震概率风险评估关键问题研究

项目编号： No.51278152

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 建筑科学

项目作者： 支旭东

作者单位： 哈尔滨工业大学

项目金额： 80万元

中文摘要： 本项目在网壳结构强震失效机理研究的基础上，考虑结构可靠度理论与基于性能的抗震思想，研究结构的地震易损性及基于性能的地震概率风险评估方法。课题研究内容主要包括：（1）研究耦合系统阻尼理论，开发高效模拟下部支承结构构件的接口程序，讨论地震动空间相关性对结构的影响；（2）研究空间网壳结构的强震失效机理，建立地震损伤模型，实现结构整体损伤定量评估，合理定义网壳结构性能水准；（3）引入结构可靠度理论，采用蒙特卡洛抽样法，开展结构基于不同性能水准的可靠度研究；（4）开展网壳结构地震易损性分析，选择合理的地震危险性模型及地震损失模型，实现结构的地震概率风险评估决策。本项目以实用化为研究目标，所取得的成果将为空间网壳结构合理抗震设计理论的建立提供有力支持。

中文关键词： 网壳结构；地震风险评估；敏感性分析；地震易损性；基于性能的抗震设计

英文摘要： On the basis of failure mechanism for reticulated shells subjected to severe earthquakes, structural reliability theory and performance-based seismic design theory, the project focuses on the study on vulnerability and performance-based probabilistic risk assessment of these structures. The research contents include: (1) to study the damping theory of coupling system, develop efficient programs to simulate concrete members in the substructure, and discuss the effect on seismic spatial correlation; (2) to study failure mechanism for reticulated shells containing the substructure, establish structural seismic damage models for assessing structural damage levels quantitative, then define structural performance levels; (3) the reliabilities for reticulated shells with different performance levels will be studied based on the structural reliability theory and Monte Carlo Analysis technique; (4) to carry out the seismic fragility analysis of reticulated shells, select seismic hazard model and earthquake loss model, and obtain the decision-making technique on the seismic probabilistic risk assessment. The research objectives for the project are to produce some applied theory on seismic risk assessment for reticulated shells, the results obtained will promote the development on seismic design theory for reticulated shel

英文关键词： reticulated shells；seismic risk evaluation；sensitivity analysis；seismic fragility；performance-based design