The design of structures based on a design earthquake mainly addresses the direct cost incurred during the construction phase, while the lifetime cost of the structure is often ignored. An investigation was performed on three steel moment-resisting structures of four storeys (case 1), seven storeys (case 2) and ten storeys (case 3) and their life-cycle costs (LCCs) were determined based on different earthquake loads. Each of the structures was designed 14 times: one model for a design earthquake, five models for higher earthquake loads and eight models for lower earthquake loads. The results revealed that none of the structures designed based on the design earthquake provided a minimum LCC. In cases 1 to 3, the LCCs were minimised when a 60%, 50% 40% increase was applied to the design earthquake, respectively. The aim of this work is not to criticise current seismic codes with respect to life safety during an earthquake, but to provoke different parts of engineering communities to think about how an LCC-based design can change costs imposed on their clients, be this the cost of repair and relocation or the cost of injuries and disabilities. The proposed methodology can be used as a case-independent tool for different structures.

中文翻译：

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基于生命周期成本的抗弯钢结构抗震设计

基于设计地震的结构设计主要解决在施工阶段产生的直接成本，而结构的生命周期成本通常被忽略。对四层（案例1），七层（案例2）和十层（案例3）的三种抗弯矩钢结构进行了研究，并根据不同的地震荷载确定了它们的生命周期成本（LCC）。每个结构被设计14次：一个用于设计地震的模型，五个用于较高地震载荷的模型和八个用于较低地震载荷的模型。结果表明，基于设计地震而设计的结构均未提供最低LCC。在情况1-3中，分别将设计地震增加60％，50％和40％时，LCC最小。这项工作的目的不是为了批评当前关于地震期间生命安全的地震法规，而是要激起工程界的不同部分来思考基于LCC的设计如何改变对客户施加的成本，这就是成本修理和搬迁费用或伤残成本。所提出的方法可以用作不同结构的大小写无关工具。