کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4920779 | 1429101 | 2016 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Finite element modeling and capacity analysis of post-tensioned steel frames against progressive collapse
ترجمه فارسی عنوان
مدل سازی عناصر محدود و تجزیه و تحلیل ظرفیت قاب فولادی پس از کشش در برابر فروپاشی پیشرفته
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کلمات کلیدی
سقوط پیشرو، قاب فولاد، اتصال پس از تنش المان محدود، حذف ستون، توزیع مجدد بار، ظرفیت سازمانی، قدم برداشتن اقدام مشترک حالت شکست
Post-tensioned connection - اتصال پس از تنشArching action - اقدام فراموشیFinite element - المان محدودLoad redistribution - توزیع مجدد بارFailure mode - حالت شکست یا حالت خرابیColumn removal - حذف ستونStructural capacity - ظرفیت ساختاریCatenary action - عمل تماسProgressive collapse - فروپاشی پیشرفتهSteel frame - قاب فولاد
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
مهندسی ژئوتکنیک و زمین شناسی مهندسی
چکیده انگلیسی
Post-tensioned (PT) steel frames, in which beams are connected to columns through high-strength PT strands, have been successfully developed in the past decade as a novel earthquake-resistant structural system. Compared to conventional steel moment frames, a PT steel frame demonstrates superior seismic performance, notably the minimum damages in main structural components and the self-centering capability under a design basis earthquake. Despite the abundant research on the seismic behavior of PT steel frames, there is an apparent lack of study on their load-redistribution behavior upon the notional removal of critical load-bearing columns, a commonly used threat-independent local structural damage scenario that potentially triggers the progressive collapse of the column-removed frame. This paper presents a first-of-its-kind numerical investigation on the unique structural behavior of PT steel connections and frames in redistributing the unbalanced gravity loads due to column removal. High-fidelity finite element structural models are constructed and validated using the available experimental data in the literature. The capacity of PT steel frames subjected to a gradually increasing vertical displacement along the removed column line is systematically studied. It is found that, besides the resistance of energy-dissipating elements, beam arching action and strand catenary action are the major sources of structural capacity of a PT steel frame against progressive collapse. The corresponding failure modes are identified and the design implications are suggested.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Engineering Structures - Volume 126, 1 November 2016, Pages 446-456
Journal: Engineering Structures - Volume 126, 1 November 2016, Pages 446-456
نویسندگان
Akbar Pirmoz, Min (Max) Liu,