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| Vehicle-Induced Vibration of Suspension Bridge with CFRP Cables Based on Different Cable Replacement Criteria |
| SUN Ya-min1,2, ZHAO Yue3, YIN Ya-zhou4 |
1. School of Architecture & Civil Engineering, Xi'an University of Science & Technology, Xi'an shaanxi 710054, China;
2. Postdoctoral Research Station on Civil Engineering, Xi'an University of Science & Technology, Xi'an shaanxi 710054, China;
3. School of Civil Engineering and Architecture, Xi'an University of Technology, Xi'an shaanxi 710048, China;
4. Highway School, Chang'an University, Xi'an Shaanxi 710064, China |
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Abstract In order to investigate the vehicle-induced vibration of suspension bridge with CFRP cables and suspenders, three different criteria were adopted to replace the cables or suspenders of Siduhe Bridge with CFRP. The influence of traffic direction and vehicle speed on the vehicle-induced vibration were analyzed. Vehicle-induced vibration properties of suspension bridges with CFRP cables and suspenders, with a pair of CFRP suspenders and with one CFRP suspender only were also studied by comparison with the suspension bridge with steel cables and suspenders. Results show that two-way vehicles may lead to smaller vibration response than one-way vehicles does though two-way vehicles have more vehicles than one-way vehicles. Besides, vehicle-induced vibration does not necessarily increase with the vehicle speed but strongly associate with speed range. In addition, no matter which criteria is adopted, the vehicle-induced responses of suspension bridges with CFRP cables and suspenders show little difference, but all larger than bridge with steel cables and suspenders, indicating that the impact of gravity stiffness on the vehicle-induced response is larger than that of elastic stiffness. Furthermore, no matter which replacement criteria is adopted, the replacement of a pair of suspenders and one suspender both have little influence on the vertical displacement of the bridge. The tensile force of replaced suspenders are nearly the same with the former steel suspenders when stiffness equivalence criteria is adopted, but higher than the tensile force of replaced suspenders when area equivalence criteria is adopted, and the tensile force of replaced suspenders is the smallest when adopting the strength equivalence criteria. The replacement of suspenders has little influence on the nearby suspender in the longitudinal direction. However, when only one suspender is replaced, the influence on the nearby suspender in transverse direction is much larger the influence on the nearby suspender in longitudinal direction.
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Received: 29 September 2021
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Corresponding Authors:
SUN Ya-min
E-mail: sunyamin@chd.edu.cn
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2021, Vol. 15 
