Two-stage real-time hybrid testing method for isolated structures

被引：0
|
作者：
Tang Z. [1 ]
Liu H. [1 ]
Li Y. [2 ]
机构：
[1] Key Lab of Urban Security and Disaster Engineering (Beijing University of Technology), Ministry of Education, Beijing
[2] Key Lab of Roads and Railway Engineering Safety Control (Shijiazhuang Tiedao University), Ministry of Education, Shijiazhuang
来源：
Harbin Gongye Daxue Xuebao/Journal of Harbin Institute of Technology | 2023年 / 55卷 / 09期
关键词：
insufficient mass; isolated structures; neural network; real-time hybrid testing; shaking table testing;
D O I：
10.11918/202201053
中图分类号：
学科分类号：
摘要：
To simulate the nonlinearity of isolation layer and isolated structure simultaneously in seismic testing, this paper proposes a two-stage real-time hybrid testing method for isolated structures. In the first stage, the isolation bearing was tested separately, and the neural network was trained by the test data for fitting the dynamic characteristics of the isolation bearing. In the second stage, the trained neural network was used to build the numerical substructure model of isolation layer, which was then combined with the isolated structure to realize real-time hybrid testing (RTHT), so as to complete the dynamic performance test of the overall isolated structures. In numerical simulation, the peak error of the results between the proposed method and overall model simulation was within 3%, while in experimental verification, the peak error of the results between the proposed method and shaking table testing of overall structures was within 6%. Numerical simulation and experimental comparison show that the proposed two-stage real-time hybrid testing has a good accuracy. It avoids the influence of insufficient mass of isolation bearing caused by reduced scale in shaking table testing, and ensures the authenticity of its dynamic performance. Besides, it can solve the errors caused by inaccurate modeling of numerical substructure when using RTHT to test the isolated structures with strong nonlinearity in each part. The two-stage real-time hybrid testing provides a new method for seismic testing of isolated structures. © 2023 Harbin Institute of Technology. All rights reserved.
引用
收藏
页码：27 / 33
页数：6
相关论文
共 18 条
  • [1] KONG Dewen, FAN Feng, ZHI Xudong, Isolation research of friction pendulum bearings in K8 single-layer reticulated domes [ J], Journal of Harbin Institute of Technology, 47, 12, (2015)
  • [2] CHEN Yanjiang, GUO Kaimin, LI Yong, Et al., Behavior of high damping seismic isolation rubber bearings for bridges[ J], Journal of Vibration and Shock, 34, 9, (2015)
  • [3] JIAO Chiyu, MA Yinqiang, LIU Luyu, Et al., Study on quasi-static test and numerical simulation of FPS bearings under two-way loading[J], Engineering Mechanics, 36, (2019)
  • [4] LI Xiangxiu, WANG Yao, LI Xiaojun, Et al., Experimental studies on seismic performance of mega-sub isolation system subjected to near-fault ground motions with velocity pulse [ J ], Journal of Basic Science and Engineering, 29, 3, (2021)
  • [5] XU Hao, HE Wenfu, LIU Wenguang, Et al., Shaking table test and rocking effect investigation of high-rise isolated structure [ J ], Structures and Buildings, 8, 174, (2021)
  • [6] XU Weizhi, WANG Shuguang, LIU Weiqing, Et al., Shaking table test on vertical seismic responses of isolated large-span structure [ J ], Journal of Building Structures, 41, 4, (2020)
  • [7] NAKASHIMAM, KATO H, TAKAOKA E., Development of realtime pseudo dynamic testing [ J ], Earthquake Engineering & Structural Dynamics, 21, 1, (1992)
  • [8] ZHANG Hongmei, ZENG Song, DUAN Yuanfeng, Et al., Overview of real-time hybrid simulation with substructure [ J ], Structural Engineer, 31, 1, (2015)
  • [9] LIN Shuchao, WANG Jingxuan, GAO Shan, Et al., Real-time hybrid test of a LNG storage tank with a variable curvature friction pendulum system [ J ], Archives of Civil and Mechanical Engineering, 21, 3, (2021)
  • [10] LANESE I, PAVESE A, DACARRO F., Development of software and hardware architecture for real-time dynamic hybrid testing and application to a base isolated structure [ J ], Journal of Earthquake Engineering, 16, 1, (2012)
12