Performance analysis of a large-span cast-in-place concrete beam composite support system based on full-process monitoring
TANG Zichao
ZHANG Jie
HU Liansheng
KONG Xiangmin
CUI Fengkun
Abstract：To analyze the actual working performance of the large-span cast-in-place concrete beam combined supporting system,to prevent support overturning accidents during construction,and to optimize structural redundancy design,a monitoring system is established based on the Jinan tram project's three-span continuous beam bridge by deploying high-precision sensors.A method combining real-time monitoring throughout the construction process with finite element simulation is used to study the key mechanical behaviors of the combination system composed of steel pipe columns,Bailey beams,and buckle supports.The results indicate that during the entire construction process,the stress monitoring results of the main components of the combined support system are generally 5％to 15％lower than the finite element calculation results,suggesting that the overall design of the combined support system based on finite element simulation possesses a higher safety reserve;the stress monitoring results of the upper chord member of the Bailey beam at mid-span showed a significantly greater discrepancy compared to the finite element results than the lower chord member at mid-span,indicating that there is a deviation between the internal constraints of the finite element model and the actual working conditions;the stress monitoring results of the diagonal braces between the steel pipe columns are greater than the finite element simulation results,which should be noted during the design phase.
Keywords：composite support systemfull-process monitoringfinite element analysisworking performance
Publication Date：2025-11-30
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：9( 86-94 )