Comfort Of Evaluation Of The Jointly-Structure Of Train Traffic And Buildings Under The Train Loading

As people’s life pace speeding up, transportation efficiency problem of different cities or even inside a city has become people’s focus. Thus large-scale integrated transportation hub buildings arise under the background. Since the size of the building is quite large, architects can use its vertical, horizontal hierarchy in space to cover plane, subway, inter-city railway, bus and other transportation seamlessly integrated transfer mode to improve the efficiency of the transportation development trend.However trains’stop in station, frequently traffic, as well as trains’moving will produce certain quantity of random vibration excitation to tracks, this motivation transmit through the ballast bed, column and slab to the above building structure. Although the vibration caused train will not produce structure security problems, it will make works and passengers in the structure feel uncomfortable, thus bring them anxiety which will affect their mood. This will obviously lower the applicability of the structure.Since the history of the integrative structure which combines building and rail transit is rather short, engineering application projects are few and academic research are quite limited. Therefore, this paper take the proposed building,Wuhan Tianhe Airport integrated transit center as the study object, illustrate the issue of vibration serviceability of such project systematically. The following research work are carried out:1. Review of domestic and foreign bibliography, summarize the recent national standards and guidelines on vibration serviceability systematically. The standards to evaluate the vibration serviceability of the buildings above subway are finally decided in this paper.2. In order to obtain the sourec of train’s vibration acceleration, the field measurements are carried out at the site of BaWangFen car depot of Beijing subway and the top of box girder of WuHan station. The train vibration load which is vibration accleleration collected when the train passed through will be entered in the building finite element model.3. According to PKPM model provided by the designer and related CAD structure design drawings, using the large general finite element analysis software ANSYS and considering soil-structure interaction effects at the same time, the upper structure finite element model and soil-Jointly-built structure finite element model of comprehensive transportation center of WuHan TianHe airport are established and the two kinds of models of general mode, the frequency and the local first step vertical bending mode, frequency are analyzed; Inputting the measured accelerations of train-induced vibration, the dynamic response of each floor above the trian line is obtained by the large mass method modified, meanwhile the vibration serviceability is evaluated based on the selected standards. In the final analysis, the response characteristics of the jointly-built structure’s vibration and influence of soil structure interaction for the dynamic response are summarized.Finally, based on the summaries and conclusions of all research works, some suggestions and prospect for further researches are put forward.