TY - JOUR
T1 - Experimental investigation of beam-column joints with cast steel stiffeners for progressive collapse prevention
AU - Han, Qinghua
AU - Li, Xinxia
AU - Liu, Mingjie
AU - Spencer, Billie F.
N1 - Funding Information:
This research project is supported by the National Natural Science Foundation of China (No. 51525803), the National Postdoctoral Science Foundation of China (No. 2016M601262), and the China Scholarship Council (No. 201606250064). The support from the funding agency is gratefully appreciated.
Publisher Copyright:
© 2019 American Society of Civil Engineers.
PY - 2019/5/1
Y1 - 2019/5/1
N2 - 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.
AB - 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.
KW - Adjustable column
KW - Cast steel stiffener
KW - Dynamic magnification factor of strain change
KW - Progressive collapse prevention
KW - Steel frame structure
UR - http://www.scopus.com/inward/record.url?scp=85062045096&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85062045096&partnerID=8YFLogxK
U2 - 10.1061/(ASCE)ST.1943-541X.0002301
DO - 10.1061/(ASCE)ST.1943-541X.0002301
M3 - Article
AN - SCOPUS:85062045096
SN - 0733-9445
VL - 145
JO - Journal of Structural Engineering (United States)
JF - Journal of Structural Engineering (United States)
IS - 5
M1 - 04019020
ER -