Analytical method for elongation of stayed-cable with catenary configuration

被引：0

作者：

Shan D.-S. ^{[1
]}

Zhang X. ^{[1
]}

Gu X.-Y. ^{[1
]}

Li Q. ^{[1
]}

机构：

[1] School of Civil Engineering, Southwest Jiaotong University, Chengdu

来源：

Jilin Daxue Xuebao (Gongxueban)/Journal of Jilin University (Engineering and Technology Edition) | 2021年 / 51卷 / 01期

关键词：

Catenary configuration; Civil engineering; Elongation; Parabolic configuration; Stay cable;

D O I：

10.13229/j.cnki.jdxbgxb20190867

中图分类号：

学科分类号：

摘要：

In order to meet the requirements of unstressed length and elongation control for stay cable during its installation, the analytical method for calculating the elongation of the stay cable with catenary configuration is discussed. First, the geometric equation of the stay cable with catenary configuration is obtained by applying the force equilibrium condition to the stay cable, and the analytical expressions of the cable length and its elongation under a certain given cable tension are acquired by direct integration. Moreover, the analytical expressions of the cable elongation under varying cable tension are obtained by using the deformation coordination condition. Then, the equivalent elastic modulus for stay cable with catenary configuration is discussed based on strain equivalence. It is verified that the equivalent elastic modulus for the stay cable with catenary configuration can be simplified to the equivalent elastic modulus for the stay cable with parabolic configuration. Taking the real parameters of the stay cables of a certain cable-stayed bridge with composite/hybrid girder as the case study, the analytical expressions of stay cable length and its corresponding elongation under a given cable tension are verified by numerical integration and simplified formulas respectively. Furthermore, the analytical expressions for the elongation of stay cable with varying cable tension are verified by the Nlabs finite element and equivalent elastic modulus method. The results show that the proposed analytical expressions can simply and directly figure out the exact elongation of stay cable, which provide the theory and straight forward method for the unstressed length of stay cable and the elongation control of stay cable during its installation. © 2021, Jilin University Press. All right reserved.

引用

页码：217 / 224

页数：7

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