《Earthquake Engineering and Structural Dynamics》杂志刊登“使用可控质量的子结构振动台试验方法：构想和数值模拟”

作者：Narutoshi Nakata, Matthew Stehman
刊物：《Earthquake Engineering and Structural Dynamics》，2012年，41卷第14期，1977—1988页
关键词：结构试验；振动台试验；子结构法；液动装置；数值模拟
摘要：本研究提供了一种新的子结构振动台试验方法，该方法可以使得结构较低部分进行试验研究而较高部分进行数值分析。导出的相容条件可以确保子结构系统的动力特性与参考结构的整体动力特性相一致。该方法利用可控质量将计算子结构的界面力结合到试验子结构上。用大量的数据转换和信号处理开发了一种处理界面力兼容性的可行程序。为了验证本文提出的子结构方法的功能和局限，对考虑控制质量系统动力特性的精细化模型进行数值模拟。模拟的结果表明：子结构方法的结果与参考结构的整体结果是相似的；地震作用下，子结构计算的顶层位移与整体结构的相比，平均误差为7.1%。数值分析研究表明:子结构试验方法有潜力代替整体结构的振动台试验方法。

Substructure shake table test method using a controlled mass: formulation and numerical simulation

Authors: Narutoshi Nakata, Matthew Stehman
Journal: Earthquake Engineering and Structural Dynamics，Volume 41, Issue 14,pages 1977–1988,November 2012
Key words: structural testing; shaking table test; substructure technique;Hydraulic actuator; numerical simulation
Abstract: This study proposes a new substructure shake table test method that allows for experimental investigation of the lower portion of structures while the upper part is numerically analyzed. Compatibility conditions are derived to ensure that the dynamic characteristics of the substructured system are equivalent to the reference entire structure. This method utilizes controlled masses to incorporate interface forces from the computational substructure to the experimental substructure. A feasible implementation procedure for the interface force compatibility is developed using a series of conversions and signal processing. For validation of the capabilities and limitations of the proposed substructure method, numerical simulations are performed using detailed models including dynamics of the controlled mass systems. Results from the numerical simulations showed that the proposed substructure method produced comparable results to the reference entire simulations. The average error between top floor displacements produced by substructured and entire responses for earthquake inputs was 7.1%. Numerical studies showed that the substructure method has potential to serve as an alternative to shaking table tests of entire structures.

原文链接：http://onlinelibrary.wiley.com/doi/10.1002/eqe.2169/abstract

翻译：徐金英；审核：安鹏