Experimental Study on Vibration Behavior of Cold-Form Steel Concrete Composite Floor
This paper introduces the experimental study on vibration behavior of 4 full scale cold-formed steel composite floors. The research is focused on the fundamental frequency of composite floor,which considering the influence of screw spacing and rigid blocking under different loading cases during normal use. The test apparatus and test methods are introduced in details. Then,the finite element analysis model of cold-formed steel composite floors is set up to study the vibration behavior. Finite element analysis results in this paper are close to those of the experiments. The results of the tests and finite element analysis show that the flexural rigidity of composite floor can be improved by changing the spacing of screws. The fundamental frequency of composite floor with large spacing of screws,that connect profiled steel sheet and the flange of joists,is smaller than the composite floor with small screw spacing. The lateral stability of joists can be strengthened; the flexural rigidity and frequency of composite floor can be increased by setting rigid blocking at mid-span of adjacent joist of the composite floor. The fundamental frequency of composite floor increases if the end restraints are enhanced. It is suggested that the fundamental frequency of cold-formed steel concrete composite floor should be more than 10Hz.
Composite floor Cold-formed steel Fundamental frequency Experimental study Finite element analysis
Xuhong Zhou Ziwen Jia Shaofeng Nie
School of Civil Engineering and Mechanics,Lanzhou University,Lanzhou,730000 China School of Civil Engineering,Changan University,Xian,710064 China
国际会议
哈尔滨
英文
116-125
2008-10-11（万方平台首次上网日期，不代表论文的发表时间）