EXPERIMENTAL AND NUMERICAL MODELLING OF COMPOSITE CRISSCROSS CONCRETE-FILLED STEEL TUBULAR COLUMNS SUBJECTED TO EARTHQUAKE LOADING
Most of architects prefer to integrate steel columns with partition walls in order to provide as much unobstructed open space as possible.In the case of wall intersections or comers,the required column size based on load demands may be larger than the wall assembly.As a result,architects have to deal with irregular comers which,in schools and correctional facilities,are prohibited due to their potential hazard to the occupancies.To resolve the issue,composite crisscross concrete-filled steel tubular columns (CCCSTCs) have been proposed to better integrate with wall layouts.Concrete is used to fill the steel column in order to increase the axial and buckling capacities.Four half-scaled specimens of such columns have been constructed and tested.Three of the four specimens were geometrically and structurally identical,but had a varying axial compressive load.When subjected to cyclic loads,all three specimens failed by rupture of the steel tube column at the column-beam connection.The fourth specimen was designed to ensure strong-column weak-beam behaviour,which has been verified by the test result.Numerical component models of the specimens were created and calibrated using the experimental hysteresis curves.Numerical system models incorporating the calibrated component models were then constructed to perform nonlinear dynamic analysis and to simulate CCCSTCs as the earthquake force resisting system.The simulations indicated that inter-storey drift ratio decreased with increasing axial compression ratio.Earthquake displacement demands were reduced for a system designed using a strong-column weak-beam approach.
Composite crisscross concrete-filled steel tubular column numerical model nonlinear dynamic analysis
T.Y.Yang Dorian P.Tung Chengxiang Xu
Department of Civil Engineering, University of British Columbia, Vancouver, BC, Canada School of Urban Construction, Yangtze University, Jingzhou, Hubei, P.R.China
国际会议
The Twelfth International Symposium on Structural Engineering (第十二届结构工程国际研讨会)
武汉
英文
1164-1169
2012-11-17（万方平台首次上网日期，不代表论文的发表时间）