In this study, a durability design theory system for engineering structures' whole life-cycle design is established. The new theory system is based on the relationships between performances, cost and service life of structures in the whole life time domain. The performance index, economic index and service life index are considered as key indexes in the whole system. Based on the established system, the limit state for durability design could be determined and the features of durability limit state are also analyzed. The proposed new durability design theory system could be used in structural performance optimization in whole life period and consequently results in the promotion of environment-friendly and resource conservation.%以结构全寿命周期为研究时域,运用结构全寿命设计的新理念,构架了工程结构全寿命设计的目标体系,并从目标体系出发,结合工程结构的特点,分析了设计中结构性能、成本、使用寿命的内涵及相互关系.在综合众多影响因素的基础上构建了工程结构全寿命周期设计理论的研究框架,确定了工程结构性能指标、经济指标及时间指标在全寿命设计理论体系中的核心地位,提出了基于性能设计的耐久性极限状态设计新理念,并分析了性能极限状态所具有的特点.
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