本文選題：反應(yīng)位移法　切入點：隧道抗震　出處：《青島理工大學(xué)》2014年碩士論文

【摘要】：伴隨經(jīng)濟(jì)持續(xù)增長，我國城市化進(jìn)程越來越快，一線城市的交通問題日益惡化，放眼全世界的超級大都市，無一例外地都把發(fā)展城市地下軌道交通作為緩解地面交通壓力的重要手段，因此大規(guī)模地開發(fā)地下空間將成為今后很長一段時期的發(fā)展趨勢。與此同時，我國也是一個地震多發(fā)國家，鑒于歷次大地震都給人民生命和財產(chǎn)造成了巨大損失，而地下結(jié)構(gòu)特別是隧道在城市基礎(chǔ)設(shè)施中占據(jù)重要地位，所以對于隧道工程，，必須預(yù)先進(jìn)行嚴(yán)格的地震反應(yīng)分析，以保證建成以后的使用過程中具有可靠的抗震性能。這方面，日本在地下工程抗震領(lǐng)域長期積累下來的經(jīng)驗值得我們學(xué)習(xí)和借鑒�；谝陨媳尘�，本文主要做了以下工作： ⑴開挖隧道地震反應(yīng)分析相關(guān)理論和方法研究。主要探討了反應(yīng)位移法在隧道地震反應(yīng)分析中的應(yīng)用，對其中一些關(guān)鍵參數(shù)的求解原理作了詳細(xì)說明，另外也總結(jié)了抗震規(guī)范中規(guī)定的抗震性能要求，概括了隧道抗震設(shè)計流程的通用步驟。 ⑵以日本某城市擬建地下交通隧道的結(jié)構(gòu)設(shè)計方案為例，基于反應(yīng)位移法對隧道結(jié)構(gòu)進(jìn)行建模與地震反應(yīng)分析，驗證隧道抗震性能。隧道結(jié)構(gòu)用梁單元模擬，用土-結(jié)構(gòu)共同作用彈簧模擬土和結(jié)構(gòu)的相互作用，用連接彈簧模擬分段結(jié)構(gòu)箱體之間的鋼筋連接，并得到一系列的地震反應(yīng)結(jié)果，主要包括隧道箱體的內(nèi)力反應(yīng)和箱體之間連接處的變形反應(yīng)，并依據(jù)相關(guān)抗震規(guī)范對所研究隧道設(shè)計方案的抗震安全性做出判斷。 ⑶提出優(yōu)化設(shè)計建議并將其反映到結(jié)構(gòu)模型中再計算直到得出理想反應(yīng)結(jié)果。對隧道設(shè)計方案中無法達(dá)到可靠抗震性能的部位提出優(yōu)化設(shè)計建議，主要是調(diào)整箱體連接使用的鋼筋量、增加結(jié)構(gòu)分段數(shù)量以及改變結(jié)構(gòu)分段箱體之間的連接方式來降低隧道結(jié)構(gòu)的地震反應(yīng)。 通過本文的研究，主要得到了以下相關(guān)有價值的結(jié)論：結(jié)合反應(yīng)位移法理論與有限元建模方法的隧道結(jié)構(gòu)動力反應(yīng)時程分析在隧道抗震性能設(shè)計中具有良好的實用性；隧道結(jié)構(gòu)的整體性與抗震性能是相矛盾的；將隧道結(jié)構(gòu)分段，選用合適的連接方式可以有效提高抗震性能。
[Abstract]:With the sustained economic growth, China's urbanization process is getting faster and faster, traffic problems in first-tier cities are worsening day by day, looking at the world's mega-cities.Without exception, the development of urban underground rail transit is regarded as an important means to relieve the pressure of surface traffic. Therefore, the large-scale development of underground space will become the development trend in a long period of time in the future.At the same time, China is also an earthquake-prone country. In view of the enormous loss of life and property caused by all the major earthquakes, underground structures, especially tunnels, play an important role in urban infrastructure, so for tunnel engineering,Strict seismic response analysis must be carried out in advance in order to ensure reliable seismic performance after completion.In this respect, Japan has accumulated long-term experience in the field of earthquake resistance of underground engineering.Based on the above background, the main work of this paper is as follows:1 study on the theory and method of seismic response analysis of excavated tunnel.This paper mainly discusses the application of response displacement method in tunnel seismic response analysis, explains in detail the principle of solving some of the key parameters, and summarizes the seismic performance requirements stipulated in the seismic code.The general steps of tunnel seismic design flow are summarized.(2) taking the structural design scheme of the proposed underground traffic tunnel in a Japanese city as an example, the seismic behavior of the tunnel is verified by modeling and seismic response analysis of the tunnel structure based on the response displacement method.The tunnel structure is simulated by beam element, the interaction between soil and structure is simulated by soil-structure interaction spring, and the connection of steel bar between segmented structure box is simulated by connection spring, and a series of seismic response results are obtained.It mainly includes the internal force response of the tunnel box and the deformation response of the joint between the boxes, and the seismic safety of the tunnel design scheme is judged according to the relevant seismic code.(3) the optimal design suggestion is put forward and reflected in the structure model and then calculated until the ideal reaction result is obtained.The paper puts forward some suggestions for optimal design of the parts of tunnel design that can not achieve reliable seismic performance, mainly by adjusting the amount of steel bar used in connecting the box body.The seismic response of tunnel structure can be reduced by increasing the number of sections and changing the connection between sections.Through the research of this paper, the following valuable conclusions are obtained: the dynamic response time history analysis of tunnel structure based on the theory of response displacement method and finite element modeling method has good practicability in the design of tunnel seismic performance;The integrity of tunnel structure is contradictory to the seismic performance, and the seismic performance can be improved effectively by dividing the tunnel structure into sections and selecting the appropriate connection mode.
【學(xué)位授予單位】：青島理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U452.28

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