钢－混凝土组合梁动力折减系数研究

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振动与冲击 ›› 2015, Vol. 34 ›› Issue (4) : 74-81.

论文

钢－混凝土组合梁动力折减系数研究

侯忠明1, 2，夏禾2，王元清1，张彦玲3

作者信息 +

Analysis of dynamic reduction coefficient for steel-concrete composite beams

HOU Zhongming1 , XIA He2 , WANG Yuanqing1, ZHANG Yanling3

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摘要

考虑钢梁与混凝土板之间的滑移，对钢－混简支组合梁的基本动力方程进行了理论推导和分析。在此基础上，考虑到组合梁与普通梁的不同力学特性，提出了适于组合梁动力计算的“刚度折减系数”和“频率折减系数”，并与《钢结构设计规范》（GB50017-2003）中的公式进行了比较分析，给出了动力刚度折减系数和频率折减系数表达式。结果表明，在组合梁的动力计算中，不能直接套用静力计算的公式来计算组合梁的等效刚度，否则会引起较大的误差。

Abstract

Considering the slip between steel girder and concrete slab, the fundamental governing motion equations of simply-supported steel-concrete composite beams are deduced and analyzed. On the above basis, considering the different mechanical characteristics from common bridges, the “dynamic stiffness reduction factor” and “frequency reduction factor” applicable to the dynamic calculation for the dynamic calculation of composite beams are proposed and compared with that in the Code for design of steel structures. Then the equivalent expression of composite beams is given. The study shows that the static expression from the Code for design of steel structures is not applicable to the calculation of dynamic equivalent stiffness, otherwise will cause obvious error.

导出引用

侯忠明;;夏禾;王元清;张彦玲. 钢－混凝土组合梁动力折减系数研究[J]. 振动与冲击, 2015, 34(4): 74-81

HOU Zhongming;XIA He;WANG Yuanqing;ZHANG Yanling. Analysis of dynamic reduction coefficient for steel-concrete composite beams[J]. Journal of Vibration and Shock, 2015, 34(4): 74-81