【摘要】：地震災(zāi)害在近幾年來(lái)發(fā)生的較為頻繁,原本被廣大學(xué)者認(rèn)為具有較好抗震性能的地下結(jié)構(gòu),在地震中有些發(fā)生了破壞,特別是穿越斷層破碎帶隧道的破壞尤為嚴(yán)重,因此對(duì)于尋找出斷層隧道地震動(dòng)力響應(yīng)因素研究已然迫在眉睫,本文主要在以下幾個(gè)方面對(duì)斷層隧道動(dòng)力響應(yīng)敏感性進(jìn)行分析： 1.詳細(xì)闡述了數(shù)值模擬中有關(guān)的基本原理,地震波的選取、輸入、修正、阻尼的選取、巖土體本構(gòu)關(guān)系及邊界條件,對(duì)斷層隧道動(dòng)力響應(yīng)分析的影響。 2.本文采用了正交試驗(yàn)的科學(xué)手段解決了多因素共同作用條件下對(duì)斷層隧道縱向響應(yīng)長(zhǎng)度及斷層隧道襯砌結(jié)構(gòu)安全性分析,選用了斷層寬度、斷層傾角、圍巖級(jí)別三種因素及三種不同的水平。本次試驗(yàn)應(yīng)用有限元軟件進(jìn)行隧道地震動(dòng)力相應(yīng)分析的模擬,并引入安全系數(shù)法對(duì)隧道襯砌結(jié)構(gòu)的破壞最為評(píng)價(jià)標(biāo)準(zhǔn),最后采用了直觀分析法和方差分析法尋找出三種因素對(duì)斷層隧道的敏感性大小及其響應(yīng)程度。 3.最后結(jié)合酒家埡隧道工程實(shí)例進(jìn)行簡(jiǎn)要闡述,對(duì)酒家埡隧道斷層核心段和隧道普通段震害做簡(jiǎn)要說(shuō)明,得出在斷層破碎帶處隧道振動(dòng)響應(yīng)強(qiáng)烈,并且對(duì)F1和F4斷層從響應(yīng)范圍及襯砌破壞的情況做簡(jiǎn)要分析,其破壞的規(guī)律同計(jì)算結(jié)果相一致,通過(guò)工程實(shí)例的說(shuō)明,因此可以得出計(jì)算結(jié)果的準(zhǔn)確性。
[Abstract]:Earthquake disasters occur more frequently in recent years. The underground structures, which were originally considered by the majority of scholars as having better seismic performance, have some damage in the earthquake, especially the damage of tunnels crossing the fault fracture zone. Therefore, it is urgent to find out the seismic dynamic response factors of fault tunnel. In this paper, the sensitivity of dynamic response of fault tunnel is analyzed in the following aspects: 1. The basic principles of numerical simulation, the selection of seismic wave, input, modification, damping selection, constitutive relation of rock and soil and boundary conditions are described in detail, and the influence of seismic wave selection on dynamic response analysis of fault tunnel is discussed. 2. In this paper, the orthogonal test is used to solve the problem of the longitudinal response length of the fault tunnel and the safety analysis of the lining structure of the fault tunnel under the condition of multiple factors acting together. The width of the fault and the angle of fault inclination are selected. Three factors of surrounding rock grade and three different levels. In this experiment, the finite element software is used to simulate the seismic dynamic analysis of the tunnel, and the safety factor method is introduced to evaluate the damage of the tunnel lining structure. Finally, the sensitivity and response of three factors to the fault tunnel are found by using visual analysis method and variance analysis method. Finally, combined with the example of Jiujiaya tunnel project, the earthquake damage of the fault core section and the common section of Jiujiaya tunnel is briefly explained, and the strong vibration response of the tunnel in the fault broken zone is obtained. The failure rules of F1 and F4 faults are consistent with the calculated results, and the accuracy of the calculation results can be obtained through the illustration of engineering examples.
【學(xué)位授予單位】：西南交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U452.28

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