Research On The Design Method Of Basement-wall Vibration Isolation For Metro Surrounding Building Structures

Along with the urbanization in China,the subway transportation has been popularized enthusiastically in order to solve urban traffic problems brought by the population explosion.However,with the subway bringing much convenience to citizens,it also causes slab vibration of surrounding buildings,which will bring some inconvenience to the residents nearby.The subject of this research is to isolate the vibrations of structures along the subway routes,and the main isolation solution is setting isolation layer with weak shear stiffness on the outer surface of basement wall.This paper combines research with the actual engineering project along metro line no.8 in ChangPing District of Beijing.This paper contains theoretical deduction,finite element analysis,product design and vibration isolation experiment,studying the basement-wall vibration isolation design method for structures along subway routes.The main research contents are as follows:1)Studies are carried out for the artificial boundaries set in the subway-related vibration simulation.This research selects the infinite element boundary to simulate the damping characteristics of soil and the propagation of vibration wave in the infinite district.For the the subway-related vibration simulation,this paper concentrates on the contact analysis and summarizes the building slab vibration discrepancy caused by the different normal and tangential contact properties,providing important reference to subway-related vibration simulation.2)Combined with the actual engineering project,authentic ABAQUS finite element model is established in this paper.Through the numerical simulation analysis,this paper finishes the theoretical design of basement-wall vibration isolation method as well as attains the basement-wall vibration isolation effect.As for underground rail vibration problem,the vibration isolation effect of the weak shear stiffness products is explored and analyzed,enlarging the application range of basement-wall vibration isolation products.3)By carrying out the full-scale test,theoretical analysis,numerical simulation,this paper finishes the theoretical design of basement-wall vibration isolation.Moreover,studies on product assembly and constructive crafts are carried out,providing guidance for engineering application of the basement-wall vibration isolation product.4)The design of basement-wall vibration isolation experiment is finished in order to acquire the practical vibration isolation effect of vibration isolation,thus constructing the "theoretical study-scheme design-numerical simulation-product design-design-experiment" mode to study on the basement-wall vibration isolation design method of structures along subway routes.