Effect of Broken Cable on Mechanical Properties of Curved Cable-stayed Bridge

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Effect of Broken Cable on Mechanical Properties of Curved Cable-stayed Bridge

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[1]YANG Yaxun,WANG Chengzhi,CHAI Wenhao,et al.Effect of Broken Cable on Mechanical Properties of Curved Cable-stayed Bridge[J].Journal of Zhengzhou University (Engineering Science),2023,44(05):101-107.[doi:10.13705/j.issn.1671-6833.2023.02.005]

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Journal of Zhengzhou University (Engineering Science)[ISSN 1671-6833/CN 41-1339/T] Volume: 44 Number of periods: 2023 05 Page number: 101-107 Column: Public date: 2023-08-20

Title:: Effect of Broken Cable on Mechanical Properties of Curved Cable-stayed Bridge

Author(s):: YANG Yaxun¹; 2; WANG Chengzhi¹ ; CHAI Wenhao¹; ZHANG Yuhang¹; ZHANG Fuhua¹

Keywords:: curved cable-stayed bridge; broken cable condition; cable force; deflection and stress of main beam; tower top offset

CLC:: U448. 27

DOI:: 10.13705/j.issn.1671-6833.2023.02.005

Abstract:: In order to study the mechanical response of long-span curved cable-stayed bridge caused by cable breaking, Xigu Chaijiaxia cable-stayed bridge in Gansu Province was taken as an engineering example, the finite element model was established by using the beam lattice method, and 15 typical cable breaking conditions were selected to analyze the changes of residual cable force, main beam deflection, main beam stress and tower top offset before and after cable breaking at different positions and different numbers. The results showed that single cable breaking would only produce local effects, the peak value of the change occurred near the broken cable anchorage zone and decreased to the surrounding. The combined fracture condition had a greater impact than the single cable fracture condition. Long cable fracture had the greatest impact, followed by medium cable and short cable. The impact of cable fracture in the middle span was greater than that in the side span. The influence of cable fracture on the broken span was greater than that of non broken span, and the influence on the broken cable surface was greater than that of non broken cable surface. The effect of cable breaking on the peak stress of the main beam and the stress distribution of the whole bridge was very small, but only on the main beam stress near the anchorage zone.

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Last Update: 2023-09-04