基于等效荷载法的消能减震结构动力时程分析
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摘要
旨在运用等效荷载法对消能减震结构动力平衡方程进行振型分解迭代求解.详细介绍了等效荷载法的迭代求解过程,该方法可结合振型分解法或数值积分法求解消能减震结构的动力平衡方程,且具有快速迭代的优点.运用振型分解法推导出经消能构件修正后的消能减震结构动力平衡方程的求解公式,并运用Fortran语言编制计算程序以实现上述求解过程.运用所编程序与有限元程序SAP2000(模态叠加法)对同一工程算例进行分析,二者计算结果基本一致,从而验证了本文所提出的等效荷载法的可行性,该方法具有良好的求解效率与计算精度,所推导的计算公式与所编程序是正确的.
Suggested equivalent load method combined with mode decomposition method is used to solve dynamic balance equation of energy dissipation structures.Detailed solving process of the equivalent load method is introduced,which can solve dynamic balance equation of energy dissipation structures with mode decomposition method or numerical integration method.and has the advantages of rapid iteration.Solution formula of the dynamic balance equation of energy dissipation structures is deduced by equivalent load method combined with mode decomposition method.And dynamical time-history analysis program of energy dissipation structure is developed by Fortran language.A 4-layer frame structure with viscous dampers is analyzed by the developed analysis program and finite element program SAP2000(Modal Superposition Method).Comparison of results obtained by two methods show that the proposed equivalent load method is feasible,solution formula deduced and dynamic analysis program developed is correct.
引文
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