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A Practical Approach to Alignment and Error Feedback Control for Long-Span Arch Bridges

Authors :
Xinyu Yao
Chuanxi Li
Longlin Wang
Mengsheng Yu
Xiaoli Zhuo
Tianzhi Hao
Xirui Wang
Source :
Buildings, Vol 14, Iss 7, p 1995 (2024)
Publication Year :
2024
Publisher :
MDPI AG, 2024.

Abstract

The accurate installation of long-span arch bridges’ arch ribs remains a challenge due to the complex calculations required for cable forces and arch rib displacements, as well as the significant influence of environmental and construction loads. In this study, we propose a practical approach to alignment and error feedback control for long-span arch bridges. Cable forces were optimized using multiple control objectives based on influence matrix principles. The impact of temperature on the next segment to be installed was analyzed using the metastatic GM(1, 1) model and fitting results. Several tunable parameters were employed to account for parameter errors and environmental interference. These parameters were adjusted based on the deviations between practical and theoretical alignments for different arch rib segments, achieving a model output of an offset-free-tracking arch rib structure. This technology was applied to monitor the construction of the Tian’e Longtan Grand Bridge. Compared to conventional alignment control approaches, the proposed method achieved excellent arch ring alignment after the closure of the high-accuracy arch rib and cable release, as well as effective control of cable force uniformity and tower deviation. Field measurement data indicate that the closing deviation of the arch ring is only 3 mm. This study provides a valuable reference for the construction control of long-span arch bridges.

Details

Language :
English
ISSN :
20755309
Volume :
14
Issue :
7
Database :
Directory of Open Access Journals
Journal :
Buildings
Publication Type :
Academic Journal
Accession number :
edsdoj.bfd2d1bb0ce84017942be01368193249
Document Type :
article
Full Text :
https://doi.org/10.3390/buildings14071995