عملکرد لرزه‌ای قاب خمشی بهسازی شده با دیوار برشی فولادی با در نظر گرفتن عدم قطعیّت‌های سازه‌ای

نوع مقاله : پژوهشی

نویسندگان

1 سمنان

2 دانشگاه سمنان دانشکده مهندسی عمران

چکیده

در مهندسی لرزه‌ای مبتنی بر عملکرد، وجود محافظه‌کاری معیارهای پذیرش باعث افزایش هزینه‌های بهسازی شده است. در نظر گرفتن عدم قطعیّت‌ها می‌تواند باعث کاهش محافظه‌کاری‌ها و هزینه‌های بهسازی گردد. در این مطالعه، به بحث قابلیّت اعتماد سازۀ بهسازی شده با دیوار برشی فولادی پرداخته و مطالعه شاخص قابلیّت اعتماد نسبت به متغیرهای احتمالاتی صورت گرفته است. سازۀ مورد مطالعه قاب خمشی فولادی نه طبقه است که قبل و بعد از بهسازی تحت تحلیل دینامیکی افزایشی قرارگرفته است. نتایج نشان داد که تنش تسلیم دیوار برشی فولادی نسبت به سایر متغیرهای احتمالاتی بیشترین تأثیر را بر روی پاسخ سازه دارد. بر اساس نتایج، بهسازی سازه باعث کاهش احتمال شکست گردیده و با در نظر گرفتن عدم قطعیّت‌ها در سازۀ بهسازی شده احتمال شکست افزایش‌یافته و درنتیجه محافظه‌کاری موجود کاهش‌یافته است.

کلیدواژه‌ها


عنوان مقاله [English]

Seismic Performance of Rehabilitated Moment Frame with Steel Shear Wall by Considering Structural Uncertainties

نویسندگان [English]

  • Mahdiye Maddahi 1
  • mohsen gerami 2
  • Hossein Naderpour 1
1
2 Faculty of Civil Engineering, Semnan University, Semnan, Iran
چکیده [English]

In performance-based seismic engineering, conservatism in acceptance criteria has increased the cost of rehabilitation. Considering of uncertainties can reduce the conservatism and the cost of rehabilitation. In this study, reliability of rehabilitated structure with steel shear wall has been discussed and study of reliability index has been performed on probabilistic variables. The studied structure is nine-story steel moment frame that has been analyzed pre-and post-rehabilitation. The results have indicated that yield strength of steel shear wall has the greatest effect on the structural response of other probabilistic variables. According to results, the rehabilitation of the structure has decreases probability of failure and consideration of uncertainties of rehabilitated structure has increased probability of failure and therefore existing conservatism has been decreased.

کلیدواژه‌ها [English]

  • Rehabilitation
  • Uncertainty
  • reliability
  • Fragility Curve
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