高阻尼设计反应谱阻尼修正系数的评估

发布时间：2018-04-22 19:07

本文选题：弹性反应谱 + 阻尼修正系数　；参考：《振动与冲击》2017年08期

【摘要】：针对目前提出的多种阻尼修正系数计算公式,选取了120条II类场地强震记录建立了10%、20%、30%三种不同阻尼比的高阻尼反应谱,通过比较精确谱和近似谱对5种典型计算公式的适用性进行分析。鉴于位移谱和加速度谱之间的转换是建立在拟谱关系上,且这种关系仅在结构阻尼较小以及忽略正余弦差异时才成立,因此对适用于建立高阻尼加速度谱和位移谱的阻尼修正系数计算公式分别进行了评价。通过分析可知,对II类场地而言,LinChang和中国建筑抗震设计规范建议的阻尼修正系数计算公式分别在估计高阻尼位移谱和加速度谱时有较好的适用性。
[Abstract]:According to the formulas for calculating damping correction coefficient, 120 strong earthquake records of class II sites are selected to establish the high damping response spectrum of 10 different damping ratios of 20% and 30%. The applicability of five typical formulas is analyzed by comparing the exact spectrum and approximate spectrum. Since the transformation between the displacement spectrum and the acceleration spectrum is based on the pseudospectral relationship, the relationship is only established when the damping of the structure is small and the sinusoidal difference is ignored. Therefore, the formulas for calculating damping correction coefficients suitable for establishing high damping acceleration spectrum and displacement spectrum are evaluated respectively. Through the analysis, it can be seen that the formulas of damping correction coefficient proposed by LinChang and Chinese Code for Seismic Design of buildings are suitable for estimating high damping displacement spectrum and acceleration spectrum, respectively.
【作者单位】：中铁第一勘察设计院集团有限公司;同济大学桥梁工程系;
【基金】：中国博士后科学基金资助(2014M562526XB) 国家重点基础研究发展计划(2013CB036302)
【分类号】：TU352.11

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