Optimal seismic design of steel frame buildings based on life cycle cost considerations
Optimal seismic design of steel frame buildings based on life cycle cost considerations
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DOI：
10.1002/eqe.273
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发表时间：
2003-07
影响因子：
4.5
通讯作者：
Min Liu;S. A. Burns;Y. Wen
中科院分区：
文献类型：
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作者：
Min Liu;S. A. Burns;Y. Wen
提出了一种基于性能的抗震设计框架内设计钢框架结构的多目标优化方法。寿命周期成本是通过将初始材料成本和寿命期地震破坏成本作为两个独立的目标来考虑的。实际的设计/施工复杂性，重要的，但很难被包括在初始成本分析，考虑到适当的建议多样性指数作为另一个目标。结构构件选自市售宽翼缘型钢数据库。现行抗震设计标准（AISC‐LRFD抗震规定和1997 NEHRP规定）用于检查任何设计备选方案的有效性。通过对原多自由度框架结构进行静力推覆分析，得到等效单自由度体系，对规范验证设计的抗震性能（最大层间位移比）进行评估。一个简单的遗传算法代码是用来找到一个帕累托最优设计集。一个五层周边钢框架建筑设计的数值例子提供了使用所提出的程序。结果发现，存在广泛的有效的设计方案，决策者从中选择一个平衡不同的目标，在最优选的方式。版权所有© 2003年约翰威利父子有限公司。
A multi‐objective optimization procedure is presented for designing steel moment resisting frame buildings within a performance‐based seismic design framework. Life cycle costs are considered by treating the initial material costs and lifetime seismic damage costs as two separate objectives. Practical design/construction complexity, important but difficult to be included in initial cost analysis, is taken into due account by a proposed diversity index as another objective. Structural members are selected from a database of commercially available wide flange steel sections. Current seismic design criteria (AISC‐LRFD seismic provisions and 1997 NEHRP provisions) are used to check the validity of any design alternative. Seismic performance, in terms of the maximum inter‐storey drift ratio, of a code‐verified design is evaluated using an equivalent single‐degree‐of‐freedom system obtained through a static pushover analysis of the original multi‐degree‐of‐freedom frame building. A simple genetic algorithm code is used to find a Pareto optimal design set. A numerical example of designing a five‐storey perimeter steel frame building is provided using the proposed procedure. It is found that a wide range of valid design alternatives exists, from which a decision maker selects the one that balances different objectives in the most preferred way. Copyright © 2003 John Wiley & Sons, Ltd.