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《Journal of Vibration and Shock》 2015-04
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Dynamic reduction coefficients for a steel-concrete composite beam

HOU Zhong-ming;XIA He;WANG Yuan-qing;ZHANG Yan-ling;Department of Civil Engineering,Tsinghua University;School of Civil Engineering,Beijing Jiaotong University;School of Civil Engineering,Shijiazhuang Railway University;  
Considering the slip between steel girder and concrete slab,the fundamental governing motion equations of a simply-supported steel-concrete composite beam were deduced and analyzed. On the above basis,considering the different mechanical characteristics between the composite beam and a common one,the dynamic stiffness reduction coefficient and frequency reduction coefficient applicable for the dynamic calculation of the composite beam were proposed and compared with those in the Code for design of steel structures. Then,the expressions of the two coefficients were deduced. The study showed that the expressions for static calculation from the Code for design of steel structures are not applicable for the calculation of the dynamic equivalent stiffness of the composite beam,otherwise a larger error can be caused.
【Fund】: 国家重点基础研究计划973项目(2013CB036203);; 国家自然科学基金项目(51178025 51108281);; 中国博士后科学基金(2014M560088);; 河北省高等学校科学技术研究项目重点课题(ZD2014025)
【CateGory Index】: TU398.9
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