Work

Sensitivity analysis and monitoring of control parameters in cantilever casting construction of prestressed concrete continuous girder bridges

Year: 2025

Type: article

Abstract: To ensure smooth closure of prestressed concrete continuous girder bridges and compliance of structural geometric alignment/stress with design requirements, this study employs finite element modeling to analyze the impact of variations in key construction control parameters during cantilever construction on bridge alignment and stress states at both the final completed stage and during maximum cantilever conditions. The investigated parameters encompass concrete unit weight, elastic modulus, prestressing loss, concrete shrinkage and creep, and temperature. Coupling effects among critical parameters were analyzed, leading to the establishment of a construction monitoring system that incorporates coupled effects of key control parameters. Results indicate that temperature variations and prestressing loss exert significant influences on girder alignment and stress, whereas concrete elastic modulus and unit weight exhibit relatively minor effects. Consequently, parameters exerting substantial impacts on alignment and stress require priority in monitoring to guarantee successful closure during cantilever construction.

Source: Scientific Reports

DOI: 10.1038/s41598-025-14692-8

Authors: Jinyang Zhang, Haiqing Liu, Xiangen Gong, Ming Lei, Liang Wang

Institution: Liaoning Technical University

Language: English

Topic: Structural Engineering and Materials Analysis

Subfield: Civil and Structural Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Industry, innovation and infrastructure

Open Access status: gold

Estimated APC paid: $2,690