Premium
Seismic behavior of specially shaped concrete‐filled steel tube columns with multiple cavities
Author(s) -
Qiao Qiyun,
Li Xiangyu,
Cao Wanlin,
Dong Hongying
Publication year - 2018
Publication title -
the structural design of tall and special buildings
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.895
H-Index - 43
eISSN - 1541-7808
pISSN - 1541-7794
DOI - 10.1002/tal.1485
Subject(s) - structural engineering , quasistatic process , bearing capacity , stiffness , materials science , tension (geology) , bearing (navigation) , tube (container) , yield (engineering) , displacement (psychology) , compression (physics) , cross section (physics) , composite material , geology , geotechnical engineering , engineering , physics , psychology , quantum mechanics , astronomy , psychotherapist
Summary To study the seismic behavior of specially shaped concrete‐filled tube (CFT) columns with multiple cavities under axial tension or axial compression, a quasistatic test of four 1/30‐scale specially shaped CFT columns with multiple cavities was conducted based on the CFT mega columns in a super‐high‐rise building. The main parameters of the 4 specimens were the direction of axial force, the direction of horizontal force, and the cross‐sectional structural form. The test was conducted twice at each level of horizontal displacement. The results shows that the compression–flexure test specimen showed lower yield damage, higher bearing capacity, and superior seismic performance relative to the tension–flexure test specimen; the specimen loaded along the short axis of the section had a lower bearing capacity and stiffness relative to the specimen loaded along the long axis; and the corner‐reinforced specimen with a round steel pipe was found to be rationally designed and properly constructed. Finally, an N–M correlation curve was generated and found to show satisfactory agreement between the fitted values and the test values.