The Response Of Adjacent Buildings Under The Vibration By Vehicle Load

With the rapid development of industry,the process of urbanization is becoming quicker and quicker.At the same time,the number of vehicles has increased rapidly.The vibration caused by road vehicle load is more and more serious.The secondary vibration of adjacent buildings caused by road vehicle could impact amenity for residence and normal use of precision instruments directly.The finite element method is used to analyze the vibration response and environmental impact of building under the influence of vehicle load,the following work has been done in this paper:1.Based on the finite element method,In this paper,a 3Dimensional dynamic model of load-subgrade soil-structure model is established.The vehicle load is simplified into harmonic impact load,the building is selected frame consruction.The influence of different soil on the vibration response of building structure is also considered.Finally,the whole process of the vibration response of the building under the vehicle load is analyzed.2.In order to prevent the reflection of the vibration wave at the boundary of the finite element,this paper introduces the application of two kinds of boundary treatment methods including the visco elastic boundary method and the infinite element method,and compares the accuracy and the calculation time of the two methods with an example.The results show that the infinite element boundary has better accuracy.Therefore,as the boundary treatment method,the infinite element method has more advantages on foundation vibration.3.Based on the numerical model,this paper makes a deep analysis on the distance to vibration source,roughness of pavement,foundation soil,vehicle speed,axle load and other factors.The vibration response of the structure is evaluated by the vibration acceleration and amplitude frequency,and the environmental impact caused by vibration is evaluated by vibration level.The results show that the decrease of distance to vibration source,increasing pavement roughness,vehicle speed,axle load,vehicle load and soil softening all could make the building structure vibration response to become larger,the influence degree of environment to strengthen.