Taking Xiangrui Street Bridge in Xining as the engineering background,it is a single-arch through continuous beam-arch combination bridge,combining with mechanical analysis and finite element modeling as the main line.The following researches were carried out on the beam-arch cooperation mechanism and structural parameters.According to the expressions of load sharing ratio of arch,bending moment ratio of arch-beam,and deformation ratio of arch-beam,combined with engineering background,the author draws the influence curves of each parameter(suspender-arch ratio of equivalent flexural rigidity,ratio of beam-arch sectional flexural rigidity,rise-span ratio,influence coefficient of axial deformation,side-to main-span ratio,side-to main-span flexural rigidity ratio)and load sharing ratio of arch,bending moment ratio of arch-beam,deformation ratio of arch-beam were drawn.The influence of structural parameters on the load sharing ratio of arch,bending moment ratio of arch-beam,and deformation ratio of arch-beam was also analyzed.It provides a mechanical basis for designers to formulate reasonable structural parameters in the initial stage of scheme design.
关键词
单拱肋下承式连续梁拱组合桥/梁拱协作机理/拱肋分担荷载比/拱梁弯矩比/拱梁变形比/结构参数
Key words
single-arch through continuous beam-arch combination bridge/beam-arch cooperation mechanism/load sharing ratio of arch/bending moment ratio of arch-beam/deformation ratio of arch-beam/structural parameters
维普
万方数据