توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱Simulation of ground motion records by consideration of spectral acceleration correlation
نویسنده(ها): ، ،
اطلاعات انتشار: ششمین کنفرانس بین المللی زلزله شناسی و مهندسی زلزله، سال
تعداد صفحات: ۶
Most of the reliable Ground Motion Record (GMR) simulation procedures use a seismological model including source, path and site characteristics. However the response spectrum of the simulated GMRs is different in some aspects when is compared with the response spectrum based on recorded GMRs. The correlation between the spectral values is one of the most important characteristics of a record which can be different for the simulated and recorded GMRs. Since this correlation has a significant influence on the structural response, it is needed to demonstrate the consistency of the simulated ground motions with the recorded ones. This issue has been investigated in this paper. The results show that using a simple point source for modeling of the faulting mechanism leads to a significant difference between the recorded and simulated ground motions in the mentioned issue. However, the use of a finite fault model for the source mechanism can modify this imperfection. Finally, a set of modeling parameters has been obtained in this paper, by using the Genetic Algorithm (GA) as an optimization technique, for more realistic simulation of GMRs.<\div>

۲The Conditional Mean Spectrum Based on Eta Indicator
نویسنده(ها): ، ،
اطلاعات انتشار: ششمین کنفرانس بین المللی زلزله شناسی و مهندسی زلزله، سال
تعداد صفحات: ۷
ground motion record GMR selection is an important issue in the structural seismic response history analysis for this purpose a set of GMRs with specific properties should be selsected the code –based approaches propose to select a set of records which shall be compatible with a target spectrum e.g uniform hazard spectrum UHS many research results have shown that using the UHS leads to significants bias in the structural response assessment.<\div>

۳Effects of the Soil–Foundation–Structure Interaction on the Component Demand Modifier Factor of Concrete Gravity Beams based on ASCE 41–06 Standard
نویسنده(ها): ،
اطلاعات انتشار: Journal of the Structural Engineering and Geotechnics، دوم،شماره۱، ۲۰۱۲، سال
تعداد صفحات: ۱۱
The aim of the present paper is to evaluate the influence of the Soil– Foundation– Structure Interaction (SFSI) effects on the component demand modifier factor of concrete gravity beams based on ASCE 41–06 standard. To this end، the beam on the nonlinear Winkler foundation approach is employed which is a simple and efficient method. At first، four sets of 3–، 6–، 10– and 15–storey concrete moment–resisting frames founded on soft، medium and hard soils are designed and analysed for the case of fixed–base and flexible–base assumptions. A comparison is then made between the results of the nonlinear response history analysis of each frame in the flexible–base and fixed–base conditions with the response based on the equivalent linear static approach. The findings show that the equivalent linear static approach loads for gravity beams، which are controlled by deformation actions، can lead to non–conservative predictions of seismic demand. Finally، a modified load combination is proposed to be used in the equivalent linear static approach to avoid this imperfection.
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