考虑平-扭耦联效应的消能减震结构振动反应分析

为深入探讨消能减震结构在发生平-扭耦联变形时的振动反应分析方法,对消能减震结构中消能装置附加阻尼比的计算理论和计算方法进行了对比分析,并建立了可以考虑平-扭耦联效应的消能装置附加阻尼比计算方法,即改进变形能比法,并深入研究了消能减震结构发生平-扭耦联变形的动力时程分析方法,如振型叠加法、状态空间解法和直接积分法。选取2个偏心结构对建立的计算模型和相关结论进行了验证分析,数值计算结果表明:改进变形能比法求解的消能减震装置附加阻尼比与精确解(复模态理论)结果相接近,3种动力分析方法在求解消能减震结构发生平-扭耦联变形时均具有较高精度,可用于此类工程抗震设计与分析。

Dynamical analysis of structure with energy dissipation devices considering coupled translation and torsion deformation

In this paper,improved method for calculating the additional damping rate of energy dissipation devices considering structural couple translation and torsion deformation was established through comparing and analysis other traditional methods,and the calculational accuracy of structural vibration response considering couple translation and torsion deformation based on different methods,such as modal superposition algorithm,state-space solution and direct integral method were contrasted.Numerical analysis of two asymmetric structures was performed to verify the suggested method and conclusions.The numerical results show that the additional damping rate of structure with energy dissipation device based on the improved method agrees well with the one with complex modal method.Three methods presented here has high precision.It can be applied into engineering seismic design and analysis.