The Research On Influence Of The Post－Casting Section Of Continuous Rigid Bridge Suffered Vibration Of Train Travelling

Postgraduate: Pu liangtao Supervisor: professor Shang shouing Senior engineer Huang gangThe research on influence of the post-casting section of continuous rigid bridge suffered vibration of train travelling is preseated in this thesis according to related project. Based on theorize analysis, expriments of material properties and members under deformed vibration, verification of isolating and reducing vibration in building as well as construction technology and quality control, the effect of post-casting section suffered deformed vibration is studied thoroughly. Through the analysis of 28 tests of shear strength with post-casting section under deformed vibration, the related laws are deduced .And the analysis of finite element method, the studies of quality control and construction technology are also completed. No bad effect on concrete strength is found within a certain range of amplitude. The ultimate loads of vibration members are not lower than those of normal ones am, when vibration frequency is below 40Hz and maximum vertical displacement is within 0.2mm. In the same condition, the tests of concrete cube show that the strengths of vibration members are about 20 percent higher than those of normal ones. As the Concrete members are vibrated from 12 to 72 hours, the difference of its strength between vibration members and normal ones is not obvious. The interface of post-casting section is both the most dangerous position of the structure and focal point of quality control. In addition, the leaking of cement paste out of the formwork of vibration member is of no permission. The effective measure of insulating and reducing of vibration must be applied. In real project, successful application of the research results is obtained.