本文選題：盾構(gòu)擴(kuò)建　切入點(diǎn)：地鐵車站　出處：《北京交通大學(xué)》2017年碩士論文

【摘要】：在未來(lái)地鐵建設(shè)中,某些特殊地點(diǎn)可能沒(méi)有條件先行建造車站,但是為了方便乘客出行,需要把有條件通車但沒(méi)條件建站的地方先行通車運(yùn)營(yíng),等待時(shí)機(jī)成熟后,再擴(kuò)建地鐵車站。因此,未來(lái)的新線建設(shè),可能會(huì)遇到在運(yùn)行盾構(gòu)區(qū)間擴(kuò)建地鐵車站的情況。針對(duì)此問(wèn)題,課題組之前做了大量的研究工作。本文的目的在于對(duì)列車開(kāi)通運(yùn)營(yíng)條件下由盾構(gòu)區(qū)間擴(kuò)建形成的新型結(jié)構(gòu)型式的地鐵車站,進(jìn)行抗震性能研究。本文對(duì)盾構(gòu)內(nèi)徑分別為7m、8.1m、11.3m的盾構(gòu)區(qū)間擴(kuò)建地鐵車站結(jié)構(gòu)方案,使用MIDASGTS軟件進(jìn)行數(shù)值模擬,分別采用反應(yīng)位移法、反應(yīng)加速度法和時(shí)程分析法三種抗震設(shè)計(jì)方法對(duì)三種結(jié)構(gòu)方案的盾構(gòu)區(qū)間擴(kuò)建地鐵車站進(jìn)行抗震性能分析,驗(yàn)算其是否滿足抗震設(shè)防要求,為運(yùn)行盾構(gòu)區(qū)間擴(kuò)建地鐵車站工程的抗震設(shè)計(jì)提供技術(shù)參考,同時(shí)對(duì)比三種計(jì)算方法在計(jì)算結(jié)果上的差異。結(jié)果表明:1、同一車站結(jié)構(gòu),在地震荷載組合作用下,盾構(gòu)管片與橫通道連接處、車站側(cè)墻位置處的內(nèi)力值比在標(biāo)準(zhǔn)荷載組合作用下的內(nèi)力值大。綜合三種方法的計(jì)算結(jié)果,彎矩值大約增大67%,軸力值大約增大33%,剪力值大約增大51%。所以,在這種類型車站設(shè)計(jì)時(shí),結(jié)構(gòu)配筋需要考慮地震荷載作用的影響。2、對(duì)三種車站結(jié)構(gòu)方案,在同一地震波作用下,反應(yīng)加速度法和反應(yīng)位移法計(jì)算結(jié)果表明盾構(gòu)內(nèi)徑7m島式站臺(tái)方案抗震性能更好,時(shí)程分析法計(jì)算結(jié)果表明盾構(gòu)內(nèi)徑8.1m島式站臺(tái)方案抗震性能更好。綜合三種方法,本文認(rèn)為盾構(gòu)內(nèi)徑7m島式站臺(tái)方案抗震性能更好。從抗震設(shè)計(jì)的角度來(lái)看,選用盾構(gòu)內(nèi)徑7m島式站臺(tái)方案更有利于抗震設(shè)計(jì)。3、采用三種抗震設(shè)計(jì)方法對(duì)三種車站結(jié)構(gòu)方案進(jìn)行抗震性能驗(yàn)算,三種結(jié)構(gòu)方案立柱軸壓比均滿足設(shè)計(jì)要求,在E2地震作用下車站結(jié)構(gòu)整體變形滿足性能等級(jí)為Ⅰ的要求。所以,三種結(jié)構(gòu)方案安全性滿足設(shè)計(jì)要求。4、對(duì)同一車站結(jié)構(gòu),在計(jì)算頂?shù)装逑鄬?duì)位移時(shí),反應(yīng)加速度法計(jì)算結(jié)果是三種方法中最大的,時(shí)程分析法計(jì)算結(jié)果是三種方法中最小的;在計(jì)算彎矩值和軸力值時(shí),反應(yīng)位移法普遍比反應(yīng)加速度法的計(jì)算結(jié)果大,時(shí)程分析法計(jì)算結(jié)果較小;在計(jì)算剪力值時(shí),時(shí)程分析法的計(jì)算結(jié)果最大。
[Abstract]:In the future subway construction, some special locations may not have the conditions to build stations first, but in order to facilitate passengers to travel, it is necessary to open the places with conditions but no conditions to build a station in advance, waiting for the time to be ripe.The subway station was further expanded.Therefore, the future construction of new lines may encounter the situation of expanding subway stations in the running shield section.In view of this problem, the research group has done a lot of research before.The purpose of this paper is to study the seismic behavior of a new type of subway station which is formed by the expansion of shield section under the condition of train opening.In this paper, the scheme of expanding subway station structure in shield section with inner diameter of 7 m ~ 8.1 m ~ (-1) m ~ (11) m is numerically simulated with MIDASGTS software, and reaction displacement method is used respectively.The response acceleration method and time history analysis method are used to analyze the seismic performance of the shield section expansion subway station of the three structural schemes, and to check whether they meet the requirements of seismic fortification.This paper provides a technical reference for the seismic design of the subway station project running shield section expansion, and compares the differences of the three calculation methods in the calculation results.The results show that under the action of seismic load combination, the internal force of the same station structure is larger than that of the standard load combination at the junction of shield segment and transverse passage and the position of side wall of station.Combined with the results of the three methods, the bending moment value increases about 67%, the axial force value increases about 33%, and the shear value increases about 51%.Therefore, in the design of this type of station, the reinforcement of the structure should consider the effect of seismic load. For three kinds of station structure, under the action of the same seismic wave,The results of response acceleration method and response displacement method show that the aseismic performance of shield tunnel inner diameter 7 m island platform scheme is better, and that of shield tunnel inner diameter 8.1 m island platform scheme is better than that of shield tunneling internal diameter 8. 1 m island platform scheme.Combined with three methods, it is considered that the 7 m island platform scheme of shield tunneling has better seismic performance.From the point of view of seismic design, it is more favorable for seismic design to select 7m island platform scheme of shield tunneling, and three seismic design methods are used to check the seismic performance of three kinds of station structure schemes.The axial compression ratio of three structural schemes can meet the design requirements. Under the action of E2 earthquake, the overall deformation of the station structure can meet the requirements of performance grade 鈪，

本文編號(hào)：1688157