Measurement and Comparative Study on Movements of Suspenders in Long-Span Suspension Bridges
Publication: Journal of Bridge Engineering
Volume 24, Issue 5
Abstract
Unanticipated damage has been observed in short suspenders near the midspan and/or ends of long-span suspension bridges. The observed damage poses a major threat to public safety if it results in fracture of suspenders which, in extreme cases, may lead to the progressive collapse of a structure. This study presents an investigation of the vibrations of suspenders, stresses in the suspender lower ends, and movement of the main cable relative to the girder based on field measurements of the Jiangyin Yangtze River Bridge (JYB) to determine the excitation-induced responses and damage mechanisms of the suspender. The results revealed that longitudinal relative movement between the main cable and girder under repetitive traffic loads could result in cyclic local bending deformation and large stress concentrations in short suspender ends; however, for long suspenders that are more flexible, the bending deformation was distributed over a larger length, preventing high stress concentrations and subsequent fatigue damage. A comparative study was conducted on the Runyang suspension bridge (RSB), which is similar to the JYB except that rigid central clamps were substituted for the shortest suspenders at midspan to inhibit differential movement and damage of the short suspenders. Results demonstrate that the central clamp can significantly mitigate the bending stress in the short suspenders by reducing the relative motion between the main cable and girder in the RSB.
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Acknowledgments
Support from the Scientific Research Foundation of the Graduate School of Southeast University under Grant YBJJ1818 is gratefully acknowledged.
References
Arafat, H. N., and A. H. Nayfeh. 2003. “Non-linear responses of suspended cables to primary resonance excitations.” J. Sound Vib. 266 (2): 325–354. https://doi.org/10.1016/S0022-460X(02)01393-7.
Benedettini, F., G. Rega, and R. Alaggio. 1995. “Non-linear oscillations of a four-degree-of-freedom model of a suspended cable under multiple internal resonance conditions.” J. Sound Vib. 182 (5): 775–798. https://doi.org/10.1006/jsvi.1995.0232.
Bloomstine, M. L., and O. Sørensen. 2006. “Prevention of main cable corrosion by dehumidification.” In Advances in cable-supported bridges, edited by K. Mahmoud, 215–230. London: Taylor & Francis.
Caetano, E., A. Cunha, V. Gattulli, and M. Lepidi. 2008. “Cable-deck dynamic interactions at the International Guadiana Bridge: On-site measurements and finite element modelling.” Struct. Control Health Monit. 15 (3): 237–264. https://doi.org/10.1002/stc.241.
Feng, D., T. Scarangello, M. Q. Feng, and Q. Ye. 2017. “Cable tension force estimate using novel noncontact vision-based sensor.” Measurement 99 (Mar): 44–52. https://doi.org/10.1016/j.measurement.2016.12.020.
Guo, T., D. M. Frangopol, and Y. Chen. 2012. “Fatigue reliability assessment of steel bridge details integrating weigh-in-motion data and probabilistic finite element analysis.” Comput. Struct. 112–113 (Dec): 245–257. https://doi.org/10.1016/j.compstruc.2012.09.002.
Guo, T., H. Kang, L. Wang, and Y. Zhao. 2016a. “Cable dynamics under non-ideal support excitations: Nonlinear dynamic interactions and asymptotic modelling.” J. Sound Vib. 384 (Dec): 253–272. https://doi.org/10.1016/j.jsv.2016.08.020.
Guo, T., J. Liu, and L. Huang. 2016b. “Investigation and control of excessive cumulative girder movements of long-span steel suspension bridges.” Eng. Struct. 125 (Oct): 217–226. https://doi.org/10.1016/j.engstruct.2016.07.003.
Guo, T., J. Liu, Y. Zhang, and S. Pan. 2015a. “Displacement monitoring and analysis of expansion joints of long-span steel bridges with viscous dampers.” J. Bridge Eng. 20 (9): 04014099. https://doi.org/10.1061/(ASCE)BE.1943-5592.0000701.
Guo, T., Z. Liu, S. Pan, and Z. Pan. 2015b. “Cracking of longitudinal diaphragms in long-span cable-stayed bridges.” J. Bridge Eng. 20 (11): 04015011. https://doi.org/10.1061/(ASCE)BE.1943-5592.0000771.
Guo, T., Z. Liu, and J. Zhu. 2015c. “Fatigue reliability assessment of orthotropic steel bridge decks based on probabilistic multi-scale finite element analysis.” Adv. Steel Constr. 11 (3): 334–346.
Hegeir, O., T. Mizutani, K. Matsumoto, K. Matsumoto, and K. Nagai. 2018. “The cause estimation of damages in Pathein suspension bridge based on vibration measurements.” Proceedings 2 (8): 379. https://doi.org/10.3390/ICEM18-05209.
Hui, Y., H. J. Kang, S. S. Law, and Z. Chen. 2018. “Analysis on two types of internal resonance of a suspended bridge structure with inclined main cables based on its sectional model.” Eur. J. Mech. A-Solids 72 (Nov–Dec): 135–147. https://doi.org/10.1016/j.euromechsol.2018.05.005.
Ji, B., D. Chen, L. Ma, Z. Jiang, G. Shi, L. Liv, H. Xu, and X. Zhang. 2012. “Research on stress spectrum of steel decks in suspension bridge considering measured traffic flow.” J. Perform. Constr. Facil. 26 (1): 65–75. https://doi.org/10.1061/(ASCE)CF.1943-5509.0000249.
Kondoh, M., M. Okuda, K. Kawaguchi, and T. Yamazaki. 2001. “Design method of a hanger system for long-span suspension bridge.” J. Bridge Eng. 6 (3): 176–182. https://doi.org/10.1061/(ASCE)1084-0702(2001)6:3(176).
Konstantakopoulos, T. G., and G. T. Michaltsos. 2010. “A mathematical model for a combined cable system of bridges.” Eng. Struct. 32 (9): 2717–2728. https://doi.org/10.1016/j.engstruct.2010.04.042.
Lepidi, M., and V. Gattulli. 2016. “Non-linear interactions in the flexible multi-body dynamics of cable-supported bridge cross-sections.” Int. J. Nonlinear Mech. 80 (Apr): 14–28. https://doi.org/10.1016/j.ijnonlinmec.2015.09.009.
Liu, Z., T. Guo, M. Hebdon, and Z. Zhang. 2018. “Corrosion fatigue analysis and reliability assessment of short suspenders in suspension and arch bridges.” J. Perform. Constr. Facil. 32 (5): 04018060. https://doi.org/10.1061/(ASCE)CF.1943-5509.0001203.
Liu, Z., T. Guo, L. Huang, and Z. Pan. 2017. “Fatigue life evaluation on short suspenders of long-span suspension bridge with central clamps.” J. Bridge Eng. 22 (10): 04017074. https://doi.org/10.1061/(ASCE)BE.1943-5592.0001097.
Malík, J. 2015. “Spectral analysis connected with suspension bridge systems.” IMA J. Appl. Math. 81 (1): 42–75.
Malm, R., and A. Andersson. 2006. “Field testing and simulation of dynamic properties of a tied arch railway bridge.” Eng. Struct. 28 (1): 143–152. https://doi.org/10.1016/j.engstruct.2005.07.011.
Mayrbaurl, R., and S. Camo. 2001. “Cracking and fracture of suspension bridge wire.” J. Bridge Eng. 6 (6): 645–650. https://doi.org/10.1061/(ASCE)1084-0702(2001)6:6(645).
MOHURD (Ministry of Housing and Urban-Rural Development). 2012. Technical specification for cable structures. JGJ257-2012. Beijing: MOHURD.
Park, C. M., J. G. Paik, S. H. Shin, and H. K. Kim. 2013. “New approach on the safety factor of cable in long-span bridges.” In Proc., 36th IABSE Symp., 1–7. Zurich, Switzerland: IABSE.
Perkins, N. C. 1992. “Modal interactions in the non-linear response of elastic cables under parametric/external excitation.” Int. J. Nonlinear Mech. 27 (2): 233–250. https://doi.org/10.1016/0020-7462(92)90083-J.
Prato, C. A., and M. A. Ceballos. 2003. “Dynamic bending stresses near the ends of parallel-bundle stay cables.” Struct. Eng. Int. 13 (1): 64–68. https://doi.org/10.2749/101686603777965008.
Qian, D., J. Guo, and R. Shen. 2010. “Study on tension testing of short hangers in suspension bridges.” Eng. Sci. 12 (7): 78–83.
Qiu, W., M. Jiang, and C. Huang. 2014. “Parametric study on responses of a self-anchored suspension bridge to sudden breakage of a hanger.” Sci. World J. 2014: 512120. https://doi.org/10.1155/2014/512120.
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© 2019 American Society of Civil Engineers.
History
Received: Jun 27, 2018
Accepted: Oct 26, 2018
Published online: Feb 22, 2019
Published in print: May 1, 2019
Discussion open until: Jul 22, 2019
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