Seismic performance of semi-rigid frames with connection dampers

اختصاصی از یارا فایل Seismic performance of semi-rigid frames with connection dampers دانلود با لینک مستقیم و پرسرعت .

مقاله با عنوان: Seismic performance of semi-rigid frames with connection dampers
نویسندگان: Reza Attarnejad , Milad Roohi Ghareshiran , Akbar Pirmoz
محل انتشار: هشتمین کنگره ملی مهندسی عمران - دانشگاه صنعتی نوشیروانی بابل - 17 و 18 اردیبهشت 93
محور: دینامیک سازه
فرمت فایل: PDF و شامل 8 صفحه به انگلیسی می باشد.

چکیده:
To reduce dynamic response of a semi-rigid frame with bolted connections, energy dissipation materials may be placed at a connection between the end plate and column flange or between the angle and member flange. In this article a three-span three bay frame with semi-rigid connections having three different capacities and energy dissipation materials analytically modeled by idealizing semi-rigid connection and energy dissipation materials as rotational spring and damper, respectively. The numerical model included nonlinear connection behavior, member yielding and geometrical nonlinearity of the structure. The pushover and dynamic analyses of the frames were performed using OPENSEES analysis program and dynamic analyses of frames with and without connection dampers show that there is an optimal damper damping coefficient by which the seismic responses of semi-rigid frame, including lateral displacements can be significantly reduced.

** توجه: خواهشمندیم در صورت هرگونه مشکل در روند خرید و دریافت فایل از طریق بخش پشتیبانی در سایت مشکل خود را گزارش دهید. **

On the behavior of low-rise, irregular, dual structure

اختصاصی از یارا فایل On the behavior of low-rise, irregular, dual structure دانلود با لینک مستقیم و پرسرعت .

مقاله با عنوان: On the behavior of low-rise, irregular, dual structure
نویسندگان: Siamak Khazaei
محل انتشار: هشتمین کنگره ملی مهندسی عمران - دانشگاه صنعتی نوشیروانی بابل - 17 و 18 اردیبهشت 93
محور: دینامیک سازه
فرمت فایل: PDF و شامل 8 صفحه به انگلیسی می باشد.

چکیده:
The Response modification factor R represents a number of structure behaviors including ductility, overstrength and the inherent redundancy. Thus, this factor is to be defined according to the type of lateral force resisting system. However, there are some complexities and/or uncertainties with regard to the codes related to the R factor in terms of height, form of irregularities and structural systems. In the present study, assuming a low-rise, vertically irregular structure with a heliport and a dual structural system, and applying a complete design, including a nonlinear finite element approach, pushover analysis, and implementation of different codes, an extensive investigation of the R factor has been conducted for different orientation of concrete core and/or irregularities in structure. It is expected that with the help of to this wide-ranging study, we can come up with an appropriate and reasonable understanding of the R factor in these types of structures.

** توجه: خواهشمندیم در صورت هرگونه مشکل در روند خرید و دریافت فایل از طریق بخش پشتیبانی در سایت مشکل خود را گزارش دهید. **

Comparison of Alternative Methods for Incremental Dynamic Analysis

اختصاصی از یارا فایل Comparison of Alternative Methods for Incremental Dynamic Analysis دانلود با لینک مستقیم و پرسرعت .

مقاله با عنوان: Comparison of Alternative Methods for Incremental Dynamic Analysis
نویسندگان: Mona Hemmati , Reza Karami Mohammadi , Ali A. Pirasteh
محل انتشار: هشتمین کنگره ملی مهندسی عمران - دانشگاه صنعتی نوشیروانی بابل - 17 و 18 اردیبهشت 93
محور: دینامیک سازه
فرمت فایل: PDF و شامل 8 صفحه به انگلیسی می باشد.

چکیده:
The conventional Incremental Dynamic Analysis (IDA) -a parametric method- is a collection of time history analyses under ground motion records which is scaled to different intensity levels. This range is selected so that can cover all structural behavior. Finally, the results are illustrated in one or more diagrams known as IDA curves. Based on recent studies, a few alternative methods to gain the IDA curves have been proposed. In this essay, the proposed methods are discussed and compared. Then the comparison and advantageous of different methods are discussed for a moment-resisting frame (MRF) under a certain earthquake record.

** توجه: خواهشمندیم در صورت هرگونه مشکل در روند خرید و دریافت فایل از طریق بخش پشتیبانی در سایت مشکل خود را گزارش دهید. **

Assessment of the Effect of Content Frequency of Ground Motions on Input Energy

اختصاصی از یارا فایل Assessment of the Effect of Content Frequency of Ground Motions on Input Energy دانلود با لینک مستقیم و پرسرعت .

مقاله با عنوان: Assessment of the Effect of Content Frequency of Ground Motions on Input Energy
نویسندگان: Azad Yazdani and Mahdi Motahar
محل انتشار: هشتمین کنگره ملی مهندسی عمران - دانشگاه صنعتی نوشیروانی بابل - 17 و 18 اردیبهشت 93
محور: دینامیک سازه
فرمت فایل: PDF و شامل 8 صفحه می باشد.

چکیده:
Input Energy that produced by ground motions in structures, is an important factor in structural analysis. In this study, wavelet transform is used as one of the useful tools in engineering for evaluating input energy and its effect on structure. Ground motion with specified frequency content are decomposed into different signals with the help of wavelet transform that each new signal covers specified frequency content of the main signal. As a result of this transform, input energy as one of the most important factors that effects on structural damage is studying using different signals with different frequency bandwidth. Input energy of 5-story structure under different near to far distance ground motions are studied using this procedure. The results illustrated the relationship of input energy and frequency content of earthquakes.

** توجه: خواهشمندیم در صورت هرگونه مشکل در روند خرید و دریافت فایل از طریق بخش پشتیبانی در سایت مشکل خود را گزارش دهید. **

دانلود کتاب (Donaldson & Minev - The Life & Games of Akiva Rubinstein Vol. 1 (2nd Edition

اختصاصی از یارا فایل دانلود کتاب (Donaldson & Minev - The Life & Games of Akiva Rubinstein Vol. 1 (2nd Edition دانلود با لینک مستقیم و پرسرعت .

با مطالعه بازیهای زیبای قهرمانان  جهان  سبک حرفه ای و روش طرح ریزی در شطرنج را سریعتر و بهتر یاد میگیرید

کتاب ارزشمند و مفید روبینشتاین جلد ا همراه با دو فرمت پی دی اف - پی جی ان

زندگی و بازیهای  Akiva روبنشتاین، جلد 1 با تفسیر کامل

نویسنده : دو استاد بین الملی جو هان دونلسون و نیکولای مینوف

تعداد صفحات 404

(Donaldson & Minev - The Life & Games of Akiva Rubinstein Vol. 1 (2nd Edition

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Akiva Rubinstein occupies a unique position in chess history. One of the greatest artists ever to sit down at a chessboard, Rubinstein was also the strongest player never to get a shot at the title of World Champion. The Life & Games of Akiva Rubinstein, Volume 1: Uncrowned King focuses on the years 1882-1920, covering Rubinstein’s rise from a modest upbringing to his emergence as Emanuel Lasker’s chief challenger in the last years leading up to World War I. It also examines the effects this conflict had on his sensitive psyche and the way it influenced his play in the post-War years. The most definitive work ever done on the first part of Rubinstein’s career, this revised and expanded edition of The Life & Games of Akiva Rubinstein, Volume 1: Uncrowned King offers almost 500 games, many of them deeply annotated with notes translated from top players of the pre-World War I era, including Lasker, Tarrasch, Schlechter and Rubinstein. The authors have also made many new annotations to the games and uncovered quite a bit of interesting material including recent discoveries on Rubinstein’s stay in Sweden after World War I. The second edition of The Life & Games of Akiva Rubinstein, Volume 1: Uncrowned King is 20 percent larger than its predecessor and with its wealth of crosstables, archival photos, multiple indexes and through bibliography it offers a treasure trove for the Rubinstein fan.