高性能结构抗多次多种灾害全寿命性能分析与设计理论研究进展

为促进高性能结构抗多次多种灾害全寿命性能设计理论研究在我国的发展，详细介绍了该领域的国内外研究现状并建立了其基本研究框架。对高性能结构在全寿命周期内可能遭受的多种灾害单独作用和联合作用的发生概率模型的研究成果进行了阐述，以碳化腐蚀作用和风致疲劳作用为例，论述了在结构全寿命周期内由环境作用引起材料及构件退化的时变模型研究现状，为开展多次多种灾害作用下高性能结构的全寿命性能分析研究提供了方向，并系统介绍了多种灾害作用下结构易损性分析方法和考虑灾害损失成本的结构全寿命抗灾性能优化设计方法的研究进展。基于全寿命周期的结构抗多次多种灾害性能设计方法，能够合理地解决传统设计方法中未考虑多种灾害联合作用和结构性能退化问题，对于建筑结构设计领域的发展具有重要意义。

Research progress on life-cycle multihazard-based design theory for high-performance structures

To improve the development of life-cycle multihazard-based design theory for high-performance structures in China, the research progress of this field was summarized and the research framework was systematically set up. The researches on the probabilistic occurrence models of individual hazard and multiple hazards were elaborated. The analytical models concerning the environmental effects on the time-variant deterioration of materials and structural component were summarized by taking the carbonization corrosion and wind induced fatigue as examples, which were conducive to guide the life-cycle performance assessment of high-performance structures subjected to multiple hazards. Moreover, the research status of the fragility analysis and the life-cycle cost based optimization design approach for high-performance structures were discussed in detail. The combined effects of multiple hazards and the lifetime deterioration of structural performance, which are neglected in the traditional specifications, can be rationally included in the life-cycle multihazard-based structural analysis and design methodology, which is of great significance for the development of building structural design.