مهندسی سازه و ساخت

مهندسی سازه و ساخت

مقایسه ظرفیت میانه فروریزش دیوار برشی فولادی به روش تقریبی (تبدیل منحنی پوش اور به شکنندگی) و دقیق

نوع مقاله : علمی - پژوهشی

نویسندگان
1 دانشجوی دکتری، گروه مهندسی عمران، واحد تهران جنوب، دانشگاه آزاد اسلامی، تهران، ایران.
2 استادیار، گروه مهندسی عمران، واحد تهران جنوب، دانشگاه آزاد اسلامی، تهران، ایران.
چکیده
در حال حاضر برای ارزیابی آسیب‌پذیری لرزه‌ای و بررسی ظرفیت فروریزش سیستم‌های مختلف سازه‌ای، نیاز به تحلیل‌های دینامیکی غیرخطی گسترده با استفاده از مدل‌سازی عددی و انتخاب رکوردهای لرزه‌ای مناسب است که نیاز به تلاش محاسباتی پیچیده و زمان‌بر دارد. برای غلبه بر این موارد، نرم‌افزار SPO2FRAG برای استخراج منحنی شکنندگی در سطوح مختلف عملکردی، به عنوان جایگزینی کارآمد برای انجام تحلیل‌های دینامیکی غیرخطی فزاینده (IDA)، توسط محققین گذشته ارائه شده است. در این پژوهش برای صحت سنجی و دقت نتایج حاصل از این نرم‌افزار، مدل عددی از سیستم سازه‌ای دیوار برشی فولادی انتخاب و با نمونه آزمایشگاهی معتبر، اعتبارسنجی گردید. پس از آن، سازه‌هایی با تعداد طبقات 4، 8، 12 و 16 به کمک آیین‌نامه طراحی شدند و منحنی شکنندگی این سازه‌ها در سطح عملکردی فروریزش به کمک دو روش مختلف (1- تحلیل دینامیکی فزاینده تحت 22 جفت رکورد زلزله حوزه دور، 2- نرم‌افزار SPO2FRAG) استخراج و مقایسه گردید. نتایج نشان داد که روش SPO2FRAG در سازه‌های 4 و 8 طبقه نتایج محافظه‌کارانه‌ای نسبت به روش دقیق ارائه می‌دهد. از طرفی با افزایش تعداد طبقات، دقت نتایج کاهش می‌یابد. بنابراین، استفاده از این روش فقط برای سازه‌هایی با ارتفاع کمتر از 16 طبقه توصیه می‌شود. در نتیجه، اگرچه SPO2FRAG می‌تواند به‌عنوان ابزاری سریع و کم‌هزینه برای ارزیابی اولیه سازه‌هایی با ارتفاع کمتر از 16 طبقه مورد استفاده قرار گیرد، اما برای مطالعات دقیق و طراحی سازه‌های مهم، استفاده از روش‌های دقیق‌تر مانند IDA ضروری است.
کلیدواژه‌ها

موضوعات


عنوان مقاله English

Comparison of Median Collapse Capacity of Steel Plate Shear Walls Using Approximate (Pushover-to-Fragility) and Exact Methods

نویسندگان English

Pooya Arezoomand Langarudi 1
Mohammad Reza Adib Ramezani 2
Ata Hojatkashani 2
saeed farokhizadeh 2
1 Ph.D. candidate, Department of Civil Engineering, South Tehran Branch, Islamic Azad University, Tehran, Iran
2 Assistant Professor, Department of Civil Engineering, South Tehran Branch, Islamic Azad University, Tehran, Iran.
چکیده English

Currently, seismic vulnerability assessment and collapse capacity evaluation of various structural systems require extensive nonlinear dynamic analyses using numerical modeling and appropriate ground motion records selection. This process demands significant computational effort and time. To overcome these challenges, the SPO2FRAG software has been introduced by previous researchers as an efficient alternative to performing incremental dynamic analyses (IDA) to extract fragility curves at different performance levels. In this study, a numerical model of a steel plate shear wall structural system was selected and validated against an experimental specimen to verify the accuracy of the results obtained from this software. Subsequently, 4-, 8-, 12-, and 16-story buildings were designed according to the building code, and their fragility curves at the collapse performance level were extracted and compared using two methods: (1) incremental dynamic analysis (IDA) under 22 pairs of far-field earthquake records and (2) SPO2FRAG software. The results showed that SPO2FRAG provides conservative results compared to the accurate method for 4- and 8-story buildings. However, its results become unreliable with an increasing number of stories. Therefore, this method is recommended only for buildings with a height of less than 16 stories. Hence, although SPO2FRAG can be used as a quick and low-cost tool for the preliminary assessment of structures with a height of less than 16 stories, more accurate methods such as IDA are necessary for detailed studies and the design of important structures.

کلیدواژه‌ها English

Steel plate shear wall
Push-over analysis
Fragility curve
SPO2FRAG
Performance-based assessment
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  • تاریخ دریافت 15 مرداد 1403
  • تاریخ بازنگری 04 بهمن 1403
  • تاریخ پذیرش 19 بهمن 1403