Research On Vibration Response And Anti-seismic Performance Of Superstructure Of Urban Traffic Tunnel

As China’s economy continues to develop and the scale of cities continues to expand,some developed cities have encountered a series of problems such as tight land area,traffic congestion,and high housing prices.It is imperative to build intensive and sustainable new ecological cities.As China’s economic development and urban underground space development increase,the collaborative construction of underground space and superstructure based on the integration of underground and above-ground space and functional integration is a new mode of urban underground and above-ground comprehensive development and construction,which is a transformation of urban old cities.Provides new development ideas.Based on transit flower lake tunnel project,under the guangzhou city Kang Wang tunnel and cover & housing structure as the research object,based on operation process& structure,two different kinds of automobile vibration and earthquake dynamic loading caused by environmental effects,through MIDAS GTS NX and MIDAS GEN entity analysis model is established,the analysis under the traffic load and earthquake load the vibration effect and the seismic performance of structures.The main research work of this paper is as follows:(1)Expounds the vibration influence index of building structure under urban environment,extensively investigates the vibration level evaluation standard of environmental vibration of different countries,comprehensively compares the vibration control standard of domestic and foreign,and formulates the vibration control standard of building structure with upper cover in combination with relevant evaluation standard of China.(2)Establish strata-traffic tunnel-cover structure 3 d model,simplifying the vehicle load to harmonic change of impact load,building frame structure of model,analysis of typical automobile traffic loads caused by buildings on the vibration response,vibration acceleration level VAL of evaluation index,analysis of vehicle type,speed,axle load,the degree of uneven pavement under different influencing factors,such as cover structure vibration influence law,according to the standard,evaluation on building structure vibration magnitude whether meet the requirements.(3)For traffic tunnel roof transfinite high-rise building structure seismic analysis,based on more severe earthquake,earthquake resistance,three different working conditions,severe earthquake research cover earthquake response of building structure,the results show that under different seismic action,cover structure comply with the relevant requirements,only one beam transfer structure appear stress concentration,conversion layer structure is reasonable.