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THE IMPACT ANALYSIS OF VIBRATION-SUPPRESSED EFFECTIVENESS OF CORE-WALL SUSPENSION ISOLATION STRUCTURE CAUSED BY DYNAMIC PARAMETER
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摘要: 基于理论分析和有限元数值计算,研究了不同的动力参数对核筒悬挂隔震结构减震效果的影响。建立了悬挂结构减震系数的计算方法,分别研究了地震作用下悬挂结构的位移减震系数、绝对加速度减震系数的变化规律,量化了质量比和频率比对悬挂结构减震效果的影响。研究表明:设置有隔震支座的悬挂隔震结构,地震作用下其相对位移和绝对加速度响应的减震耗能明显强于传统的悬挂结构;必须保证质量比和频率比在一定的取值范围内,才能避免悬挂结构产生共振效应,获得比较理想的减震效果。Abstract: Based on the theoretical analysis and the finite element numerical calculation,the impact analysis of vibration-suppressed effectiveness of core-wall suspension isolation structure caused by dynamic parameter was made.A calculation method for the damping coefficient of the core-wall suspended structure was set up,under action of earthquake,the change law of damping coefficient of displacement and absolute acceleration,the vibration-suppressed effectiveness of core-wall suspension isolation structure caused by mass ratio and frequency ratio was also quantified.Research showed that the vibration-suppressed effectiveness of the relative displacement and absolute acceleration of the suspension isolated structure with bearings was stronger than the traditional suspension structure.It must ensure that mass ratio and frequency ratio should be in a certain range,which then could avoid resonance effect of the suspended structure happening and get an ideal vibration-suppressed effectiveness.
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