Study On Seismically Resistant Issue Of Hongtudi Subway Station Structure

In recent years, natural disasters occurs frequently. Among them the earthquakedisaster is the most serious one. Potential earthquake disasters must be taken intoaccount in the process of the design and construction of underground railway andappropriate measures should be taken in order to reduce losses as much as possible oreven avoid them when earthquakes happen. Therefore, the study on earthquake resistantissue of underground railway structure is of great significance.This paper is based on the engineering practice of Hongtudi subway station ofChongqing metro line6.The structure of the station is modeled in Midas-GTS FEMsoftware and it`s seismic response characteristics and seismic performance are analyzed,the main research contents are summarized as follows：①The seismic response characteristics on some important part of secondary lining,shotcrete and bolt in the Hongtudi railway station structure are analyzed, theimprovement measures for the seismic performance of the station structure are proposedaccording to these characteristics.②Comparative analysis of the seismic response characteristics of all parts in thestation structure are done in the cases of different secondary lining thickness. Thecharacteristics of influences of lining thickness on seismic performance are concluded,and provide a reference basis for the design of lining thickness.③Simulation analysis of the seismic performance of subway station structures indifferent depth are done, the characteristics of influences of depth on the seismicperformance are concluded, and provide a reference basis for the design of stationdepth.④Analysis based on the large amount of computation results are done and someconstructive suggestions about the improvement of seismic performance of undergroundrailway station are proposed. These suggestions provide a reference to other similarprojects.