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عنوان فارسی مقاله:
تجزیه و تحلیل سقوط تدریجی بتن ستون لوله فولادی برای اتصالات تیر با مدل چند مقیاسی
عنوان انگلیسی مقاله:
rogressive Collapse Analysis of Concrete-filled Steel Tubular Column to Steel Beam Connections Using Multi-scale Model
سال انتشار : 2016
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مقدمه انگلیسی مقاله:
1. Introduction
Since the 911 event, more and more researchers have focused on the investigation of the resist progressive collapse performance of structures [1–6]. It is important to predict the failure mechanism and the alternate load path of structures which occur progressive collapse under abnormal accidental events. Some researchers have found that the joint areas connected with the failure column can generate an unbalanced load when frame structures occur progressive collapse. Moreover the unbalanced load is able to disperse to the adjacent areas by the beam resistance mechanism and catenary resistance mechanism which provide by the beam-column joints [7,8]. Therefore the beamcolumn joints are key elements for frame structures to resist progressive collapse events. Some experimental investigations have focused on the performance of steel beam-column joints [9–15] and reinforced concrete beamcolumn joints [16,17]. These study results suggest that the catenary resistance mechanism developed in the beams and connections plays a critical role in the resistance of structure progressive collapse. However, these experiments have only studied the joint parts and did not consider the effects of the other structural parts that are connected with these joints. Moreover, there are few researches focus on the study of progressive collapse of the steel beam to CFST column connections by now. Thus the performance of some steel beam to CFST column connections was investigated under a central-column-removal scenario in this paper. In order to improve the understanding of the behavior of these connections to resist progressive collapse, the multi-scale numerical model which could reflect the effect of the adjacent structures was used to investigate the performance of these joints. And these numerical models adopted the nonlinear static analysis method and the nonlinear dynamic analysis method to study the progressive collapse resistance capacity of the steel beam to CFST column connections.
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کلمات کلیدی:
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