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K. Shi, X.Q. Mo, H. Xu, Z.L. Wang, Y.B. Yang, "Identification torsional-flexural frequencies for thin-wall beams from the rocking motion of a two-wheel test vehicle", in P. Ivanyi, J. Kruis, B.H.V. Topping, (Editors), "Proceedings of the Seventeenth International Conference on Civil, Structural and Environmental Engineering Computing", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 6, Paper 2.7, 2023, doi:10.4203/ccc.6.2.7

Keywords: torsional-flexural frequency, thin-wall beam, contact point, moving vehicle, vehicle scanning method.

Abstract

This paper proposes a furthering approach for extracting the first several flexural and torsional-flexural frequencies of thin-walled box girders from the residual contact response of a two-wheel test vehicle passing the bridge. Unlike most previous studies, the single-axle test vehicle is modeled as a two degree-of-freedom system to account for the two wheels’ rocking motion, which relates to torsional-flexural motion of the beam. To start, a new theory for the monosymmetric thin-walled beam subjected to a two-wheel moving vehicle is presented. The wheel contact response derived herein (which is free of vehicle frequencies) enables us in the first stance to remove the overshadowing effect on bridge frequencies brought by outstanding vehicle frequencies. The other concern in extracting the bridge frequencies is the noises posed by random pavement roughness, which is overcome through the use of the residual contact response generated by two identical connected vehicles. This paper furthers the existing ones in that the wheel response (i.e. the vehicle’s rocking motion) is utilized to extract the torsional-flexural frequencies of the bridge, making use of the linking action between the vehicle’s two wheels and the bridge’s cross section.

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Front Page Browse CCC CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Conferences ISSN 2753-3239 CCC: 6 PROCEEDINGS OF THE SEVENTEENTH INTERNATIONAL CONFERENCE ON CIVIL, STRUCTURAL AND ENVIRONMENTAL ENGINEERING COMPUTING Edited by: P. Ivanyi, J. Kruis and B.H.V. Topping Paper 2.7 Identification torsional-flexural frequencies for thin-wall beams from the rocking motion of a two-wheel test vehicle K. Shi, X.Q. Mo, H. Xu, Z.L. Wang and Y.B. Yang School of Civil Engineering, Chongqing University, Chongqing, China doi:10.4203/ccc.6.2.7 Full Bibliographic Reference for this paper K. Shi, X.Q. Mo, H. Xu, Z.L. Wang, Y.B. Yang, "Identification torsional-flexural frequencies for thin-wall beams from the rocking motion of a two-wheel test vehicle", in P. Ivanyi, J. Kruis, B.H.V. Topping, (Editors), "Proceedings of the Seventeenth International Conference on Civil, Structural and Environmental Engineering Computing", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 6, Paper 2.7, 2023, doi:10.4203/ccc.6.2.7 Keywords: torsional-flexural frequency, thin-wall beam, contact point, moving vehicle, vehicle scanning method. Abstract This paper proposes a furthering approach for extracting the first several flexural and torsional-flexural frequencies of thin-walled box girders from the residual contact response of a two-wheel test vehicle passing the bridge. Unlike most previous studies, the single-axle test vehicle is modeled as a two degree-of-freedom system to account for the two wheels’ rocking motion, which relates to torsional-flexural motion of the beam. To start, a new theory for the monosymmetric thin-walled beam subjected to a two-wheel moving vehicle is presented. The wheel contact response derived herein (which is free of vehicle frequencies) enables us in the first stance to remove the overshadowing effect on bridge frequencies brought by outstanding vehicle frequencies. The other concern in extracting the bridge frequencies is the noises posed by random pavement roughness, which is overcome through the use of the residual contact response generated by two identical connected vehicles. This paper furthers the existing ones in that the wheel response (i.e. the vehicle’s rocking motion) is utilized to extract the torsional-flexural frequencies of the bridge, making use of the linking action between the vehicle’s two wheels and the bridge’s cross section. download the full-text of this paper (PDF, 10 pages, 1175 Kb) go to the previous paper go to the next paper return to the table of contents return to the volume description
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