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Abstract

When the cable clamp is used, the bolt force will be relaxed, which will cause the stress amplitude on the cable clamp member to change. For welded cable clamps, the fatigue properties at the weld will change. In this paper, the effect of bolt force relaxation on the weld fatigue life was studied by taking the relaxation of bolt force of welded cable clamps of Xintian Yangtze River Bridge in Wanzhou District during operation as an example. Firstly, the geometric shape and structural characteristics of welded cable clamps were analyzed, and the numerical model of welded cable clamps with bolts was established. Secondly, the stress distribution of welded cable clamps under constant load and fatigue load was analyzed, and the mechanical characteristics of welded cable clamps were studied. Then, different bolt forces were applied to the welded cable clamps to study the change of stress amplitude under bolt force loss. Finally, the effect of bolt force relaxation on the fatigue life of welded cable clamps was analyzed by using the experimental data suitable for the study model. The results show that although the bolt force loss reduces the weld stress of welded cable clamps, it increases the stress amplitude of the weld, which leads to a decrease in the weld fatigue life of welded cable clamps. A larger stress amplitude means a more obvious phenomenon.

Publication Date

11-24-2023

DOI

10.14048/j.issn.1671-2579.2023.05.029

First Page

172

Last Page

176

Submission Date

March 2025

Reference

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