TY - JOUR
T1 - Considering frictional slippage at saddle-cable interface in seismic behavior of a suspension bridge
AU - Zhao, Canhui
AU - Duan, Jiahong
AU - Zeng, Xianzhi
AU - Deng, Kailai
AU - Guo, Jia
AU - Yang, Shaojun
AU - Wen, Qiang
N1 - Funding Information:
The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This study received support from the National Natural Science Foundation of China (Grant No. 52078436) and Sichuan Science and Technology Program (Grant No. 2019YFH0139).
Publisher Copyright:
© The Author(s) 2020.
PY - 2021/4
Y1 - 2021/4
N2 - Long-span suspension bridges are widely used in deep valleys, which face severe seismic risk. However, the potential saddle-cable frictional slippage under earthquake excitation as well as its influence on the seismic response of the whole suspension bridge has not yet been investigated. To investigate the effect of frictional slippage at the saddle-cable interface, this paper developed a nonlinear numerical model that considers the saddle-cable slippage. Another contrasting model with a non-slipping saddle-cable interface was used for quantitative comparison. Nonlinear dynamic analyses were conducted using these two models. The saddle-cable interfacial response indicated the realization of the frictional slippage at the saddle-cable interface under the maximum considered earthquake. The overall damage patterns, critical sectional performance, main girder drift, and energy dissipation were discussed in detail. Under the design based and maximum considered intensities, the saddle-cable slippage was seldom observed. The visible frictional slippage was encountered only at ultimate safety earthquake, which could be helpful to limit the transferred load, protect the pylon from yielding, and dissipate approximately 14% of the input seismic energy. While the slippage could not evidently affect the overall deformation pattern of the suspension bridge, as well as the response of bearings and central buckles.
AB - Long-span suspension bridges are widely used in deep valleys, which face severe seismic risk. However, the potential saddle-cable frictional slippage under earthquake excitation as well as its influence on the seismic response of the whole suspension bridge has not yet been investigated. To investigate the effect of frictional slippage at the saddle-cable interface, this paper developed a nonlinear numerical model that considers the saddle-cable slippage. Another contrasting model with a non-slipping saddle-cable interface was used for quantitative comparison. Nonlinear dynamic analyses were conducted using these two models. The saddle-cable interfacial response indicated the realization of the frictional slippage at the saddle-cable interface under the maximum considered earthquake. The overall damage patterns, critical sectional performance, main girder drift, and energy dissipation were discussed in detail. Under the design based and maximum considered intensities, the saddle-cable slippage was seldom observed. The visible frictional slippage was encountered only at ultimate safety earthquake, which could be helpful to limit the transferred load, protect the pylon from yielding, and dissipate approximately 14% of the input seismic energy. While the slippage could not evidently affect the overall deformation pattern of the suspension bridge, as well as the response of bearings and central buckles.
KW - damage pattern
KW - energy dissipation
KW - frictional behavior
KW - nonlinear dynamic analysis
KW - saddle-cable interface
KW - suspension bridge
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U2 - 10.1177/1369433220974778
DO - 10.1177/1369433220974778
M3 - Article
AN - SCOPUS:85096539613
VL - 24
SP - 995
EP - 1008
JO - Advances in Structural Engineering
JF - Advances in Structural Engineering
SN - 1369-4332
IS - 5
ER -