Fast Seismic Life Cycle Cost Optimization of Steel Moment Frames to Improve Seismic Performance
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This study presents a fast method of Life Cycle Cost (LCC) optimization of structures. One of the main obstacles to implementation of seismic lice cycle cost optimization is the time-consuming process of evaluating the possibility of failure of the structure. To overcome this restriction, in the proposed approach, the probability of failure is estimated using fragility functions. A fast method for developing the fragility function was employed in this paper to reduce the computation time. Two well-studied frames, adopted from the literature, were studied to demonstrate the implementation of the methodology. A comparison of results with previous studies indicates that a reasonable increase in the initial cost substantially reduces damage and life-cycle costs of the structure. It also significantly improves the seismic performance of structures. The proposed method can be employed to design more reliable and economical structures.
Keywordslife cycle cost optimization fragility curve performance based design seismic design
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