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Envelope Random Decrement Technique for Identification of Nonlinear Damping of Tall Buildings

机译:高层建筑非线性阻尼识别的包络随机减量技术

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摘要

To accurately identify the nonlinear damping ratio of tall buildings, the authors propose an envelope random decrement technique (RDT). To verify the accuracy of the envelope RDT for the evaluation of amplitude-dependent nonlinear damping ratio, an iterative computing method, which can accurately work out the response of structures whose parameters depend on the response amplitude in any form, is also proposed. Then, using three different damping models in the numerical simulations, of which the response is calculated by the proposed iterative computing method, the applicabilities of traditional RDT, RDT ranked by peak amplitude, and the envelope RDT presented in this paper for the evaluation of amplitude-dependent nonlinear damping ratio are analyzed and compared. Results indicate that envelope RDT is better than the other two methods for the evaluation of amplitude-dependent nonlinear damping ratio. Finally, the envelope RDT is applied to identify the damping ratios of the Shanghai World Financial Center.
机译:为了准确识别高层建筑的非线性阻尼比,作者提出了一种包络随机递减技术(RDT)。为了验证包络RDT用于评估与振幅有关的非线性阻尼比的准确性,还提出了一种迭代计算方法,该方法可以精确地计算出参数取决于响应振幅的结构的响应形式。然后,在数值模拟中使用三种不同的阻尼模型,通过所提出的迭代计算方法来计算响应,传统RDT的适用性,按峰幅度排序的RDT以及本文提出的用于幅度评估的包络RDT依赖的非线性阻尼比进行了分析和比较。结果表明,与幅度相关的非线性阻尼比相比,包络RDT优于其他两种方法。最后,使用包络线RDT来确定上海环球金融中心的阻尼比。

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