Abstract
A through tied-arch bridge with multi-point elastic constraints (MTAB) is proposed based on the truss structure concept to improve the natural vibration characteristics of the conventional through tied-arch bridge (CTAB). Rigid inclined rods are added between the main beam and arch ribs to form an integral truss structure with arch ribs as upper chords, rigid inclined rods as web members, and the main beam as a bottom chord to increase the rigidity of the structure. Through timely system transformation, arch ribs bear all dead loads and the integral truss structure bears all the live loads so that the advantages of arch ribs and web members are maximized. The pulsation test and finite element analysis (FEA) were carried out to verify the superiority of the natural vibration characteristics of the MTAB based on a 50 m span test bridge. Taking a 350 m span arch bridge as an example, the natural vibration characteristics and other mechanical characteristics of the MTAB were studied and compared with that of the CTAB. The results show the MTAB has better mechanical properties and economy, especially natural vibration characteristics and stiffness.
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Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request. All data, models, and code generated or used during the study appear in the submitted article.
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Acknowledgements
The authors are grateful for the grants awarded by the Guangxi Key R & D Plan (No. Guangxi Sciences AB18126047) and the Systematic Project of Guangxi Key Laboratory of Disaster Prevention and Structural Safety (No. 2016ZDX0001). The grant have supported the works described in this paper.
Funding
Awarded by the Guangxi Key R & D Plan (No. Guangxi Sciences AB18126047) and the Systematic Project of Guangxi Key Laboratory of Disaster Prevention and Structural Safety (No. 2016ZDX0001). The grant have supported the works described in this paper.
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C.Q., X.X. contributed to the conception of the study; C.Q., C.Y. performed the experiment; X.Q., C.Y contributed significantly to analysis and manuscript preparation; C.Q., C.Y. performed the data analyses and wrote the manuscript; C.Q., M.P. helped perform the analysis with constructive discussions.
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Qiu, C., Xie, X., Yang, C. et al. Methods of Improving the Natural Vibration Characteristics of the Through Tied-Arch Bridge and Test Verification. Int J Steel Struct 22, 343–360 (2022). https://doi.org/10.1007/s13296-022-00577-3
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DOI: https://doi.org/10.1007/s13296-022-00577-3