توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱A NONLINEAR DYNAMIC BASED REDUNDANCY INDEX FOR REINFORCED CONCRETE FRAMES
نویسنده(ها): ، ،
اطلاعات انتشار: سومین کنفرانس بین المللی بتن و توسعه، سال
تعداد صفحات: ۱۳
In almost all codes of practice for seismic resistant design of buildings, a behavior factor is used to reduce design base shear. The behavior factor is affected by several parameters such as ductility, overstrength and redundancy reduction factors. There are two common approaches to assess the effects of redundancy on the strength of a structural system, which are as follows: Static Pushover Analysis
and Incremental Dynamic Analysis. The two indices: redundancy strength coefficient and redundancy variation coefficient have been introduced to measure these effects. Simplified methods are developed and presented to calculate these parameters. In this paper the redundancy strength and the redundancy variation parameters are evaluated for the reinforced concrete plane frames with different
number of stories, bays and ductility capacities. The investigations indicate that these two parameters are mainly the results of redundancy reduction factors.<\div>

۲A NEW PERIOD–BASED DAMAGE INDEX FOR SEISMIC ASSESSMENT OF RC FRAMES AND ITS VERIFICATION
نویسنده(ها): ،
اطلاعات انتشار: ششمین کنفرانس بین المللی زلزله شناسی و مهندسی زلزله، سال
تعداد صفحات: ۱۱
Nonlinear dynamic characteristics are appropriate indices to evaluate seismic behavior of damaged structures precisely. These characteristics reflect the effects of material properties, distribution of cracks and plastic hinges, construction quality and infill panels. Nonlinear characteristics may be extracted by some field tests like forced and\or ambient vibration methods. Recently a new damage index, based on nonlinear fundamental period of damaged structures, was represented by the authors to evaluate damage rate of reinforced concrete (RC) buildings after each moderate and\or severe earthquakes. This paper explains the procedure of finding the new period–based damage index and verifies the represented pattern of this damage index through some experimental data. This verification helps to trust and validate a pattern which estimates damage rates of RC buildings without modeling. As the proposed damage index is not depend on modeling, it could be more accurate than others, if it be calibrated using real data; because the modeling procedures which is depend on many known and unknown factors, could affect the results of analyses.<\div>
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