توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱Seismic Behavior of Steel Moment Frames with Chevron Bracings against Artificial Earthquakes
اطلاعات انتشار: دومین کنگره بین المللی سازه ، معماری و توسعه شهری، سال
تعداد صفحات: ۱۳
Dual systems in form of steel moment frames accompanied with chevron bracings are among commonly used systems in high seismicity regions in the world. Therefore, the recognition of their seismic behavior is of high importance. Except a few parts of the world that have sufficient earthquake records, artificial accelerograms can be used in other regions. One method for generating artificial accelerograms is using wavelet transform. In this paper, 5–, 10–, 15– and 20–story structures are designed according to ASCE7 requirements. Spectra matching process is performed for 44 earthquake records. Pushover and nonlinear time history analysis is done in order to investigate seismic behavior of this system against real and artificial earthquake records. It can be concluded that responses against artificial records has far less dispersion, while the average responses in these two sets of records are approximately the same.<\div>

۲Seismic Performance of Uplift–Permitted Steel Moment–Resisting Frames in Near–Fault Regions
اطلاعات انتشار: دومین کنگره بین المللی سازه ، معماری و توسعه شهری، سال
تعداد صفحات: ۱۳
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.<\div>
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