Analysis of creep and shrinkage effects in buliu river bridge
(0) In order to analyze the shrinkage and creep effect for segmental, cast-in-place concrete cantilever continuous rigid frame bridges with long-span and high piers, an effective calculation model should be developed. The analysis method for shrinkage and creep effect based on initial strain is discussed. By considering the time-dependent effect of prestressed tendons and concrete, an automatic triangular element mesh generation scheme for a beam element section is proposed. The strain in each triangular area of the beam section caused by shrinkage, creep, temperature gradient field and prestress relaxation can then be calculated respectively. The vector of equivalent nodal loads is then derived from the internal force equilibrium condition in the section and virtual work principle. A computer software system TDPA is developed by application of the proposed method. TDFA has been successfully applied to the time-dependent analysis of Buliu River Bridge in Guangxi Province of China. By calculation, the reasonable construction parameters and mechanical characteristics are obtained that provide the correct control data for construction. In addition, the reliable analysis is performed. The result can be taken as a reference for the long-term time-dependent deformation monitoring.
Initial strain method Creep Shrinkage Composite section Finite element analysis
Weian Wang Jianren Zhang Qianhua Yu Shunkun Tan
Highway Planning, Survey, Design & Research Institute, Sichuan Province Communications Department, C School of Bridge and Structural Engineering, Changsha University of Science & Technology, Changsha 4
国际会议
国际断裂力学2007年会(Fracture Mechanics and Applications 2007)
长沙
英文
187-194
2007-11-01（万方平台首次上网日期，不代表论文的发表时间）