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Title:: Analysis of Collapse Pattern of Spatial Grid Structure under the Influence of the Earthquake

作者:: 吴冲¹; 3; 戴君武^1; 彭卿²; 吴碧野¹; 成维根³; (1.中国地震局工程力学研究所中国地震局地震工程与工程振动重点实验室,黑龙江哈尔滨 150080; 2.河南省工建集团有限责任公司,河南郑州 450016; 3.中冶京诚工程技术有限公司,北京 100176)

Author(s):: WU Chong¹; 3; DAI Junwu¹; PENG Qing²; WU Biye¹; CHENG Weigen³; (1.Key Laboratory of Earthquake Engineering and Engineering Vibration,Institute of Engineering Mechanics,China Earthquake Administration,Harbin 150080,Heilongjiang,China)(2.Henan Gongjian Group co.,Ltd,Zhengzhou 450016,Henan,China)(3.MCC Capital Engineering & Research Incorporation Limitel,Beijing 100176,China)

Keywords:: geotechnical centrifuge; shaking table; key technology; performance evaluation

摘要:: 以显式动力分析方法为基础,模拟了强震作用下3种跨度网格结构的倒塌全过程,通过数值分析发现:水平地震作用下网格的倒塌形式以强度破坏为主,竖向地震作用下以动力失稳破坏为主,三向地震作用下为水平与竖向地震作用倒塌形式的耦合。对比分析了3种跨度网格结构倒塌形式和倒塌时地震波幅值,结果表明:平板网格结构倒塌形式与跨度关系不大,但易倒塌程度与跨度直接相关。得到了网格结构的倒塌形式和倒塌时构件首先失效的位置,可为实际工程结构的倒塌预防与控制提供一定的参考。

Abstract:: In this paper,the development history and construction status of China's geotechnical centrifuges are reviewed.And the performance indicators and functional characteristics of existing equipment are summarized.Taking the DCIME-40-300 power centrifuge of the Institute of Engineering Mechanics of the China Earthquake Administration as an example,the key technologies for developing geotechnical centrifuges for seismic toughness are described,including geotechnical centrifuge,centrifugal shaking table,cooling system of main engine room,rainfall simulation system,freeze-thaw cycle system,etc.The basic design plan or main points to solve the key problems are given.Aiming at the performance evaluation requirements of centrifugal shaking table,a performance testing scheme and evaluation index of centrifugal shaking Tab.are proposed,and several test results are given.The results show that when the sinusoidal waves load,the average waveform distortion is approximately 10.7%.When seismic waves load,the average amplitude error is approximately 4.44%,and the average spectral area error is approximately 5.89%.All are superior to the technical indicators stipulated by relevant industry standards.