發(fā)布時(shí)間：2018-05-09 08:41

  本文選題：交叉盾構(gòu)隧道 + 聯(lián)絡(luò)橫通道　； 參考：《西南交通大學(xué)》2017年碩士論文

【摘要】：針對(duì)交叉盾構(gòu)隧道在長(zhǎng)期運(yùn)營(yíng)過程中容易出現(xiàn)振動(dòng)損傷問題,依托國(guó)家自然科學(xué)基金項(xiàng)目(51278425),采用理論分析和數(shù)值模擬方法,開展了交叉隧道結(jié)構(gòu)振動(dòng)響應(yīng)及疲勞累積損傷研究。根據(jù)改進(jìn)的混凝土疲勞本構(gòu)模型,考慮列車行駛效應(yīng),分析含聯(lián)絡(luò)橫通道結(jié)構(gòu)交叉盾構(gòu)隧道和近距離空間交叉盾構(gòu)隧道的疲勞壽命,以及兩種交叉隧道結(jié)構(gòu)在不同運(yùn)營(yíng)年限的動(dòng)力響應(yīng)和累積損傷。主要工作和成果如下:(1)根據(jù)現(xiàn)行混凝土設(shè)計(jì)規(guī)范中混凝土單軸本構(gòu)模型,考慮疲勞損傷導(dǎo)致的混凝土剛度退化、強(qiáng)度下降和疲勞殘余應(yīng)變?cè)黾拥纫蛩?改進(jìn)并提出了混凝土疲勞本構(gòu)模型,該模型適合開展高周列車振動(dòng)疲勞分析;(2)分別建立了結(jié)構(gòu)交叉和空間交叉盾構(gòu)隧道兩種交叉隧道模型,考慮列車行駛效應(yīng),模擬了列車在隧道中行駛的全過程。基于列車首次行駛引起的結(jié)構(gòu)動(dòng)力響應(yīng),采用名義應(yīng)力法,獲得了兩種交叉盾構(gòu)隧道的疲勞壽命;(3)基于改進(jìn)的混凝土疲勞本構(gòu)模型,分析了不同運(yùn)營(yíng)年限結(jié)構(gòu)交叉和空間交叉盾構(gòu)隧道的應(yīng)力、加速度等動(dòng)力響應(yīng)特性。結(jié)果表明:觀測(cè)點(diǎn)振動(dòng)具有明顯的階段性;列車所在主隧道中部位置振動(dòng)最為劇烈,鄰近主隧道振動(dòng)相對(duì)平緩;隨著列車運(yùn)營(yíng)年限的增加,隧道結(jié)構(gòu)的應(yīng)力和加速度均有一定程度的增加;(4)采用混凝土塑性損傷模型,分析了在運(yùn)營(yíng)不同年限后結(jié)構(gòu)交叉和空間交叉盾構(gòu)隧道的壓致累積損傷和拉致累積損傷特性。結(jié)果表明:對(duì)于交叉盾構(gòu)隧道,主隧道累積損傷隨運(yùn)營(yíng)時(shí)間呈兩階段發(fā)展特性,而聯(lián)絡(luò)橫通道累積損傷隨運(yùn)營(yíng)時(shí)間呈三階段發(fā)展特性;主隧道累積損傷主要集中在隧道仰拱位置,而聯(lián)絡(luò)橫通道累積損傷主要集中在其兩側(cè)邊墻墻角位置;隧道結(jié)構(gòu)拉致累積損傷大小和范圍均大于壓致累積損傷,拉致?lián)p傷是結(jié)構(gòu)損傷破壞的控制性因素。
[Abstract]:In view of the problem of vibration damage in the long run of cross shield tunnel, the vibration response and fatigue cumulative damage of cross shield tunnel structure are studied by theoretical analysis and numerical simulation method, relying on the project of National Natural Science Foundation of China (NSFC) of 51278425. Based on the improved concrete fatigue constitutive model, the fatigue life of cross shield tunnel and close space cross shield tunnel are analyzed by considering the train running effect. As well as the dynamic response and cumulative damage of two kinds of cross-tunnel structures under different operating life. The main work and results are as follows: (1) according to the uniaxial constitutive model of concrete in the current concrete design code, the factors such as the degradation of concrete stiffness caused by fatigue damage, the decrease of strength and the increase of fatigue residual strain are considered. The concrete fatigue constitutive model is improved and put forward. The model is suitable for the vibration fatigue analysis of high cycle trains. Two kinds of cross tunnel models, namely structural crossing tunnel and space crossing shield tunnel, are established to consider the train running effect. The whole process of train running in tunnel is simulated. Based on the structural dynamic response caused by the first running of a train and the nominal stress method, the fatigue life of two kinds of cross shield tunnel is obtained. The dynamic response characteristics such as stress and acceleration of shield tunnel with different operating years are analyzed. The results show that the vibration of the observation point has obvious stages, the vibration of the middle part of the main tunnel is the most intense, the vibration of the adjacent main tunnel is relatively gentle, and with the increase of the train operating life, The stress and acceleration of tunnel structure are increased to a certain extent. The concrete plastic damage model is used to analyze the cumulative damage caused by compression and tension in tunnel with cross and space crossing shield after different years of operation. The results show that the cumulative damage of the main tunnel develops in two stages with the operation time, while the cumulative damage of the connecting transverse tunnel develops in three stages with the operation time. The cumulative damage of the main tunnel is mainly concentrated in the position of the tunnel inverted arch, while the cumulative damage of the connecting transverse passage is mainly located at the corner of the sidewall on both sides of the tunnel, and the cumulative damage caused by the tensile damage of the tunnel structure is larger than that caused by the cumulative damage caused by compression. Tensile damage is the controlling factor of structural damage.
【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】：2017
【分類號(hào)】：U455.43

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 晏啟祥;黃希;吳聰;陳誠;耿萍;;混凝土腐蝕后列車振動(dòng)對(duì)水下交叉隧道的影響分析[J];鐵道標(biāo)準(zhǔn)設(shè)計(jì);2017年03期

2 劉寧;彭立敏;施成華;;基巖軟化條件下仰拱結(jié)構(gòu)疲勞壽命的預(yù)測(cè)分析[J];振動(dòng)工程學(xué)報(bào);2016年05期

3 黃希;晏啟祥;陳誠;李彬嘉;;列車振動(dòng)荷載作用下交叉盾構(gòu)隧道動(dòng)力響應(yīng)與損傷分析[J];鐵道建筑;2016年08期

4 單仁亮;黃博;耿慧輝;白瑤;燕發(fā)源;;爆破動(dòng)載作用下新噴射混凝土累積損傷效應(yīng)的模型實(shí)驗(yàn)[J];爆炸與沖擊;2016年03期

5 王青;衛(wèi)軍;劉曉春;徐港;;鋼筋混凝土梁疲勞累積損傷過程的等效靜力分析方法[J];中南大學(xué)學(xué)報(bào)(自然科學(xué)版);2016年01期

6 晏啟祥;陳誠;黃希;周侶;何川;;盾構(gòu)隧道與橫通道交叉結(jié)構(gòu)的列車振動(dòng)響應(yīng)特性分析[J];土木工程學(xué)報(bào);2015年S1期

7 雷俊卿;肖峗;張坤;李忠三;王悅瑜;;預(yù)應(yīng)力混凝土梁變幅疲勞性能試驗(yàn)研究[J];振動(dòng)與沖擊;2013年18期

8 高丹盈;張明;朱海堂;;鋼筋鋼纖維高強(qiáng)混凝土梁疲勞試驗(yàn)研究及剛度計(jì)算[J];建筑結(jié)構(gòu)學(xué)報(bào);2013年08期

9 王啟云;張家生;孟飛;陳曉斌;陳俊樺;;高速鐵路路基模型列車振動(dòng)荷載模擬[J];振動(dòng)與沖擊;2013年06期

10 吳瑾;王晨霞;徐賈;肖珍;吳方華;;疲勞荷載下銹蝕鋼筋混凝土梁彎曲性能試驗(yàn)研究[J];土木工程學(xué)報(bào);2012年10期

，

本文編號(hào)：1865334