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Abstract

According to the theory of the non-stress state method, the elastic curve of the main girder during the central-span closure should remain continuous to ensure that the internal forces and alignment of the built cable-stayed bridge reach the target state after construction, which means the relative angle of the main girders on both sides of the closure should be zero. However, it is difficult to meet the condition of absolute zero of the relative angle in practical engineering. By taking the Chibi Changjiang River Highway Bridge as the engineering background, this paper studied the influence of relative angle error during the central-span closure of a large-span composite girder cable-stayed bridge on the final target state of the built bridge, thus determining the allowable range of relative angle error. The analysis results reveal that the relative angle error of the main girders on both sides of the closure gap during the central-span closure mainly has a significant influence on the stress of the main girders under the target state of the built bridge, with little effect exerted on tower deviation, cable force, and main girder alignment. For the Chibi Changjiang River Highway Bridge, the allowable relative angle error of the main girders on both sides of the closure can be set as ±1×10-3 rad during the central-span closure. Within this range, it can be considered that the elastic curves of the main girders on both sides of the closure are continuous.

Publication Date

1-18-2024

DOI

10.14048/j.issn.1671-2579.2023.06.018

First Page

115

Last Page

119

Submission Date

March 2025

Reference

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