Owing to complicated construction and loading at combination segment of arch foot,the local stress analysis is needed when designing the long span continuous beam-arch combination bridge.A finite element model for combination segment at arch foot was established.The method of determining boundary force of local model was put forward and the local stresses were analyzed by FEM.The calculation and anal-ysis results showed that the stress states of combination segment at arch foot met the requirements of the de-sign specification requirements on the whole.Stress concentration phenomena appeared at chamfer position of diaphragm plate connected with the top slab,bottom slab and web of the beam,respectively.Smooth transition sections were recommended to chamfer.Stress concentration phenomena also appeared at the top slab inserting the arch foot and the bottom slab setting the bearing,where the strengthening constructional reinforcement was suggested to layout.
关键词
连续梁拱组合体系/有限元法/拱脚结合段/局部应力分析/剪力滞效应/应力集中
Key words
Continuous beam-arch combination/FEM/Combination segment at arch foot/Local stress a-nalysis/Shear lag effect/Stress concentration
维普
万方数据