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Experimental Investigation of Beam–Column Joints with Cast Steel Stiffeners for Progressive Collapse Prevention
| 题名： | Experimental Investigation of Beam–Column Joints with Cast Steel Stiffeners for Progressive Collapse Prevention |
| 正文语种： | 英文 |
| 作者： | Qinghua Han, Ph.D.1; Xinxia Li2; Mingjie Liu, Ph.D.3; Billie F. Spencer Jr., Ph.D., F.ASCE4 |
| 作者单位： | 1Professor, Dept. of Civil Engineering, Key Laboratory of Coast Civil Structure Safety of China Ministry of Education, Tianjin Univ., Tianjin 300072, China. 2Ph.D. Candidate, Dept. of Civil Engineering, Tianjin Univ., Tianjin 300072, China. 3Assistant Researcher, Dept. of Civil Engineering, Tianjin Univ.,Tianjin 300072, China (corresponding author). 4Newmark Endowed Chair in Civil Engineering, Dept. of Civil and Environmental Engineering, Univ. of Illinois at Urbana-Champaign,Urbana, IL 61801. |
| 关键词： | Cast steel stiffener; Progressive collapse prevention; Dynamic magnification factor of strain change; Adjustable column; Steel frame structure |
| 摘要： | A full-scale experimental study was carried out on a two-story steel frame to investigate the progressive collapse behavior of beam–column joints with cast steel stiffeners (CSS). The frame was divided into four vertical sections, and each section had a specific joint arrangement of (1) joints with CSS and (2) welded joints without stiffeners. Seven loads of increasing magnitude were applied to the frame. In each section, one of the columns had a device at the base that could be removed and replaced to simulate the failure and repair of this column; this column is referred to as an adjustable column. Strain changes and displacements were monitored during column removal. Moreover, three types of finite-element models were developed to simulate the test frame. The results showed that compared to a welded joint without stiffeners, joints with CSS reduced the strain change and deformation of the frame, as well as the dynamic strain magnification factor of strain change; concrete slabs played a significant role during the load redistribution in the sudden failure of the adjustable column. |
| 出版年： | 2019 |
| 期刊名称： | Journal of Structural Engineering |
| 卷： | 145 |
| 期： | 5 |
| 页码： | 1-15 |
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