تحلیل حساسیت خرابی پیشرونده در قاب های خمشی و مهاربندی شده ی هم محور فولادی با پلان های مستطیلی و L شکل

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری سازه، دانشکده مهندسی عمران، دانشگاه سمنان.

2 دانشیار، دانشکده مهندسی عمران، دانشگاه سمنان.

10.22091/cer.2020.5767.1208

چکیده

پدیده خرابی پیش‌رونده به‌دلیل اینکه می‌تواند پایداری کل سازه و ایمنی جانی ساکنین آن را تهدید نماید، طی چند سال اخیر، مورد توجه محافل علمی قرار گرفته است. در خرابی پیش‌رونده تعیین المان کلیدی که بیشترین پتانسیل ایجاد خرابی را دارد، اهمیت زیادی دارد. چهار مدل سازه فولادی با دو سیستم سازه‌ای قاب خمشی و دوگانه مهاربندی شده با پلان‌های مستطیلی و L شکل تحلیل حساسیت شده است. براساس تحلیل فزاینده قائم، در سیستم قاب خمشی فولادی با پلان‌های مستطیلی و L شکل و در سیستم دوگانه با مهاربندهای میانی، ستون‌های گوشه و در سیستم دوگانه (مهاربندهای میانی و کناری) با پلان مستطیلی و در سیستم دوگانه (مهاربندهای کناری) با پلان L شکل، ستون داخلی بیشترین پتانسیل خرابی را دارد. نتایج تحقیق نشان می‌دهد سازه‌های بلند، عملکرد بهتری در برابر خرابی پیش‌رونده داشته و افزایش ارتفاع مدل‌ها در سیستم دوگانه، تأثیر زیادی در کاهش خرابی پیش‌رونده ندارد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Sensitivity Analysis of Progressive Collapse in Steel Moment Frames and Braced Rectangular and L-Shaped Plan

نویسندگان [English]

  • Hamze Rouhi 1
  • Majid Gholhaki 2
1 Ph.D student, Faculty of Civil Engineering, Semnan University.
2 Associate Professor, Faculty of Civil Engineering, Semnan University.
چکیده [English]

The progressive collapse because it can be sustained the whole structure and the safety of the lives of residents threatens that has been the focus of scientific circles over the past few years. In the progressive collapse determining the key element that most potential for failure is of great importance. Four structural steel structures with two frames and dual systems are sensitivity analyzed with two structural systems in rectangular and L- shaped planes. Based on the results of the pushdown analysis in steel moment frame with rectangular and L-shaped planes and the dual system with middle braces, the corners column and the dual system (middle and corner braces) with a rectangular plan and in the dual system (corner braces) with the L- plan the internal column has the most potential for collapse. The results show that higher-heightened structures have a better performance against progressive collapse, and the increase in the height of the models in the dual system does not have much effect on reducing progressive collapse.

کلیدواژه‌ها [English]

  • Progressive collapse
  • Push down analysis
  • Sensitivity analysis
  • Key element
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