Design of Hanging Basket for Cantilever Construction of Continuous Beam Bridge and Research on Preloading Test
Based on the continuous beam project of the Wenjiatai Extra Large Bridge on the Shanghai Chongqing Chengdu high-speed railway,research on the design and application of diamond shaped hanging basket structure is carried out.Using finite element software to simulate the stress and deformation of its structure,conducting numerical calculations through preloading tests and comparing and analyzing the results of preloading tests to verify the strength,stiffness,and safety of the hanging basket structure.The research results indicate that using MIDAS/CIVIL software for safety performance verification of the hanging basket structure,the maximum stress of the hanging basket structure occurs during the concrete pouring process of the bridge,with a maximum stress value of 160.53MPa,which meets the strength requirements.Taking into account the displacement of each component,the maximum deformation of the hanging basket structure occurs at the mid span position of the longitudinal beam of the bottom support system,with a maximum deformation value of 19.91mm,and the stiffness meets the requirements for use.The deformation and settlement of each monitoring point in the preloading test were relatively uniform,consistent with the numerical calculation results of the hanging basket structure,verifying the construction safety and quality requirements of the hanging basket structure,and achieving the goal of eliminating non elastic deformation of the hanging basket.
bridgesdiamond hanging basketstructural designsecurity verificationpreloading test
万方数据
维普
