Seismic Performance of Uplift-Permitted Steel Moment-Resisting Frames in Near-Fault Regions
Publish Year: 1393
نوع سند: مقاله کنفرانسی
زبان: English
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ICSAU02_0517
تاریخ نمایه سازی: 16 خرداد 1394
Abstract:
Seismic performance of steel moment-resisting frame structures is investigated considering nonlinear soil-structure interaction (SSI) effects. 10-, 15-, and 20-story planar building frames with aspect ratio of 3 are designed in accordance with current building codes. Inelastic seismic demands of the superstructure are considered using concentrated plasticity model. The raft foundation system is designed for different soil types. Beam-on-nonlinear Winkler foundation (BNWF) is used to represent dynamic impedance of the underlying soil. Two sets of pulse-like as well as no-pulse near-fault earthquakes are used as input ground motions. The results show that the reduction in drift demands due to nonlinear SSI is characterized by a more uniform distribution pattern along the height when compared to the fixed-base and linear SSI condition. It is also concluded that beneficial effects of nonlinear SSI on displacement demands is more significant in case of pulse-like ground motions and performance level of the steel moment-resisting frames can be enhanced.
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Authors
Elmira Shoushtari Rezvani
Ms.c Student, Amirkabir University of Technology, Tehran, Iran
S. Mojtaba Alian Amiri
Ms.c Student, Semnan University, Semnan, Iran.
Mohsen Tehranizadeh
Professor, Amirkabir University of Technology, Tehran, Iran
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