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Dynamic response analysis of a multiple-beam structure subjected to a moving load

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Abstract

In this study, the dynamic response of an elastically connected multi-beam structure subjected to a moving load with elastic boundary conditions is investigated. The boundary conditions and properties of each beam vary, and the difficulty of solving the motion equation is reduced by using a Fourier series plus three special transformations. By examining a high-speed railway (HSR) with mixed boundary conditions, the rationality for the newly proposed method is verified, the difference in simulated multiple-beam models with different beam numbers is explored, and the influence of material parameters and load speed on the dynamic response of multiple-beam structures is examined. Results suggest that the number of beams in the model should be as close to the actual beam number as possible. Models with an appropriate beam number can be used to describe in detail the dynamic response of the structure. Neglecting the track-structure can overestimate the resonant speed of a high-speed railway, simply-supported beam bridge. The effective interval of foundation stiffness (EIFS) can provide a reference for future engineering designs.

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Acknowledgement

The work was financially supported by the National Natural Science Foundations of China (U1934207 and 51778630), the Hunan Innovative Provincial Construction Project (2019RS3009), the Innovation-driven Plan in Central South University (2020zzts159), and the Fundamental Research Funds for the Central Universities of Central South University (2018zzts189).

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Authors and Affiliations

  1. School of Civil Engineering, Central South University, Changsha, 410075, China

    Yuntai Zhang, Lizhong Jiang, Wangbao Zhou, Shaohui Liu, Xiang Liu & Zhipeng Lai

  2. National Engineering Laboratory for High Speed Railway Construction, Changsha, 410075, China

    Lizhong Jiang

  3. School of Civil Engineering and Architecture, East China Jiaotong University, Nanchang, 330013, China

    Yulin Feng

Authors
  1. Yuntai Zhang
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  2. Lizhong Jiang
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  3. Wangbao Zhou
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  4. Shaohui Liu
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  5. Yulin Feng
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  6. Xiang Liu
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  7. Zhipeng Lai
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Corresponding author

Correspondence to Wangbao Zhou.

Additional information

Supported by: National Natural Science Foundations of China under Grant Nos. U1934207 and 51778630, the Hunan Innovative Provincial Construction Project under Grant No. 2019RS3009, the Innovation-driven Plan in Central South University under Grant No. 2020zzts159, and the Fundamental Research Funds for the Central Universities of Central South University under Grant No. 2018zzts189

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Zhang, Y., Jiang, L., Zhou, W. et al. Dynamic response analysis of a multiple-beam structure subjected to a moving load. Earthq. Eng. Eng. Vib. 21, 769–784 (2022). https://doi.org/10.1007/s11803-022-2106-3

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  • DOI: https://doi.org/10.1007/s11803-022-2106-3

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