Technical gazette, Vol. 30 No. 5, 2023.
Preliminary communication
https://doi.org/10.17559/TV-20230227000385
Cable Replacement Scheme for Low Tower Cable-Stayed Bridges Based on Sensitivity Analysis
Yang Zhao
; School of Civil Engineering and Communication, North China University of Water Resources and Electric Power, Zhengzhou 450045, China
Jun Wu
; School of Civil Engineering and Communication, North China University of Water Resources and Electric Power, Zhengzhou 450045, China
Tongning Wang
; School of Civil Engineering and Communication, North China University of Water Resources and Electric Power, Zhengzhou 450045, China
Xin Cui
; School of Civil Engineering and Communication, North China University of Water Resources and Electric Power, Zhengzhou 450045, China; Henan Urban Planning Institute & Corporation, Zhengzhou 450044, China; School of Water Conservancy and Civil Engineering, Zhengzhou University, Zhengzhou 450001, China
Xiusong Fu
; Henan Urban Planning Institute & Corporation, Zhengzhou 450044, China
Abstract
Cable replacement is a key technique to solve the problems of cable corrosion and strand breakage. Cable removal causes structural changes. The choice of replacement method affects the safety of the bridge during cable replacement. A sensitivity analysis method was used to evaluate the force and deflection changes of Wohu Bridge. A reasonable method for the number and order of cable replacement was proposed; by comparing different cable removal schemes, it was revealed that the cable force and beam stress changes of the cables closest to the removed cable were the most significant. The results showed that the cable force increment of the surrounding cables was the largest when removing the longest cable. The structural impact change was small when removing the shortest cable. The maximum deflection at the top of the tower decreased with the decrease of the length of the removed cable. It was recommended to replace two cables symmetrically from the center of the tower, and the optimal replacement order was from the shortest cable to the longest cable. Furthermore, this paper also studied the influence of variable load on the cable replacement scheme, and demonstrated that the design scheme of opening part of traffic in this paper was safe and feasible.
Keywords
cable replacement process analysis; finite element analysis; low tower cable-stayed bridge
Hrčak ID:
307747
URI
Publication date:
31.8.2023.
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