中文摘要：

现代结构系统在灾害中产生巨大经济损失的特点,使人们意识到在结构设计之初就对结构的寿命周期总费用进行有效评估、并反过来指导工程设计具有重要意义。对网壳结构寿命周期总费用的计算方法进行研究,分别提出初始造价、维护费用和失效损失的计算公式,并考虑寿命周期内网壳结构可能受到的荷载发生的概率,建立寿命周期总费用的计算方法,编制网壳结构寿命周期总费用的计算程序。通过一具体的网壳结构工程算例验证上述方法和程序的有效性。研究结果表明,网壳结构初始造价的追加投资会由于结构使用过程中失效损失费用的减小而得到补偿,而寿命周期总费用最小正是结构设计的最优状态,按照现行规范设计方法得到的结构配置方案不一定是寿命周期总费用最小的方案。

英文摘要：

The huge losses of modern structural systems caused by disasters have confirmed the necessity of evaluating the life-cycle cost in structural design and guiding the construction.The calculation method of life-cycle cost of latticed shell structures is studied.The formula for initial building cost,maintenance cost and loss cost is proposed,and the formula for life-cycle cost is formulated considering the occurrence probability of load in the life-cycle of latticed shell structures.The validity of the calculation method and procedure is tested,and the results show that the added invest in the initial building cost of latticed shell structures will be compensated by decrease of loss cost in structure life,and that the minimum of life-cycle loss is the optimum state of structure design.