Journal of South China University of Technology (Natural Science Edition) ›› 2021, Vol. 49 ›› Issue (3): 123-130.doi: 10.12141/j.issn.1000-565X.200322

Special Issue: 2021年交通运输工程

• Traffic & Transportation Engineering • Previous Articles     Next Articles

An Efficient Computation Method for Real-Time Hybrid Testing of Vehicle-Track-Bridge Coupling System of High-Speed Railway

GU Quan1  ZHANG Deyu1  GUO Wei2  WU Jiliang1  YUAN Bin1  ZHOU Huimeng3  WANG Tao3   

  1. 1． School of Civil Engineering，Xiamen University，Xiamen 361005，Fujian，China; 2． School of Civil Engineering，Central South University，Changsha 410075，Hunan，China; 3． Key Laboratory of Earthquake Engineering and Engineering Vibration， Institute of Engineering Mechanics，CEA，Harbin 150080，Heilongjiang，China
  • Received:2020-06-15 Revised:2020-09-21 Online:2021-03-25 Published:2021-03-01
  • Contact: 国巍(1982-)，男，教授，博士生导师，主要从事高铁结构抗震减震与试验技术研究。 E-mail:guowei@csu.edu.cn
  • About author:古泉(1974-)，男，教授，博士生导师，主要从事非线性结构体系地震动力分析等的研究
  • Supported by:
    Supported by the National Natural Science Foundation of China ( 51878674)

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Abstract: Since the train runs fast，it is necessary to build a long enough bridge and to adopt a sufficiently refined vehicle-track-bridge coupling mode in real-time hybrid testing of high-speed railway system． Therefore，high accuracy and efficiency of numerical computation is essential． At the same time，the real-time hybrid testing requires high instantaneity，and each step needs to be completed in a short time，which further increases the difficulty of the problem． To this end，a new computation method，named the moving load integration method，was proposed． The data needed for the numerical substructure computation of the bridge was stored before the testing． In the actual computation，the corresponding data of each time step was extracted and computed to obtain the displacement response of the current time step． The method was extended to the local nonlinear condition by means of the elastoplastic numerical substructure method，and then the feasibility and reliability of the method were systematically verified by the real-time hybrid testing of the scaled-down high speed railway shaking table．

Key words: high-speed railway system, moving load integration method, numerical substructure, real-time hybrid testing

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