现浇板对RC框架结构动力特性影响机理分析

摘要

应用ABAQUS中提供的Lanczos特征值求解器对钢筋混凝土框架结构进行模态分析,分别分析了楼板质量和楼板的刚度对RC框架结构的自振周期的影响.建立了不带楼板的纯框架模型、不带楼板但梁附加楼板质量源的模型和带楼板的模型,对这3种有限元模型进行模态分析,并通过楼板的质量影响率和刚度影响率来分析楼板质量和刚度对框架结构动力特性的影响.再对单参数和多参数分别进行分析,结果表明单参数的板厚、梁截面、柱截面尺寸变化和多参数的梁柱线刚度比变化对结构自振周期有影响.%Reinforced concrete frame structure is analyzed with Lanczos eigenvalue solver provided by ABAQUS,the effect of floor quality and rigidity on natural vibration period of RC frame structure is analyzed.First,build the pure frame model without floor,model without floor and with floor quality source and model with floor,analyze their finite element model,and analyze the effect of floor quality and rigidity on dynamic characteristics of frame structure by its influence of quality and rigidity.Respectively analyze single and multi parameters,research the effect of slab thickness,beam section and column cross-section dimension change in single parameter and stiffness ratio change of beam and column line in multi parameters on structural vibration period.