【摘要】：在地下空間結(jié)構(gòu)大規(guī)模開(kāi)發(fā)的背景下，隨著行車(chē)速度和行車(chē)密度日益加大以及隧道里程的不斷增加，各類(lèi)隧道事故發(fā)生的數(shù)量和頻率也相應(yīng)增加。其中，火災(zāi)發(fā)生頻率高居各災(zāi)害之首，除煙霧使人窒息以外，高溫下結(jié)構(gòu)損壞甚至倒塌是造成人員傷亡的原因之一，更是造成直接和間接經(jīng)濟(jì)損失的主要原因，因此研究隧道襯砌結(jié)構(gòu)火災(zāi)下溫度場(chǎng)分布特點(diǎn)及受損特性對(duì)深入認(rèn)識(shí)襯砌結(jié)構(gòu)的火災(zāi)反應(yīng)和抗火性能具有重大意義。并為隧道結(jié)構(gòu)的健康監(jiān)測(cè)提供指導(dǎo)。 本文的研究主體為高溫火災(zāi)作用下的隧道襯砌結(jié)構(gòu)，采用數(shù)值模擬作為主要的研究手段，，著重從隧道襯砌結(jié)構(gòu)形狀、襯砌混凝土強(qiáng)度等級(jí)、不同受火場(chǎng)景等方面對(duì)其力學(xué)特性和穩(wěn)定性進(jìn)行分析研究，具體研究?jī)?nèi)容包括以下幾方面： （1）分析研究隧道襯砌結(jié)構(gòu)在高溫火災(zāi)作用下的一般力學(xué)特性和受損規(guī)律，得出受火時(shí)間長(zhǎng)短和受火范圍大小直接影響襯砌結(jié)構(gòu)溫度場(chǎng)的分布，并擬合出破損規(guī)律曲線(xiàn)； （2）考慮隧道斷面形狀、混凝土強(qiáng)度等級(jí)及隧道受火時(shí)間對(duì)高溫火災(zāi)下隧道溫度場(chǎng)和應(yīng)力場(chǎng)的影響規(guī)律，得到受火時(shí)間為影響襯砌溫度和位移的主要因素，隧道斷面形狀和混凝土強(qiáng)度等級(jí)為次要因素； （3）模擬分析襯砌結(jié)構(gòu)在防火保護(hù)層作用下的溫度分布及動(dòng)態(tài)破壞特性，并提出有效的隧道襯砌結(jié)構(gòu)火災(zāi)時(shí)的預(yù)防保護(hù)措施，最終得到防火保護(hù)層導(dǎo)熱系數(shù)越低，其隔熱隔溫效果越好； （4）用有限元軟件模擬分析工程實(shí)例，并與實(shí)例結(jié)果相對(duì)比，得到有限元軟件火災(zāi)模擬可行性及可靠性。
[Abstract]:Under the background of large-scale development of underground space structure, with the increasing of driving speed and driving density and the increasing of tunnel mileage, the number and frequency of various tunnel accidents also increase correspondingly. In addition to smog suffocating, structural damage or even collapse at high temperature is one of the causes of casualties, and it is also the main cause of direct and indirect economic losses. Therefore, it is of great significance to study the characteristics of temperature field distribution and damage characteristics of tunnel lining structure under fire in order to deeply understand the fire response and fire resistance of lining structure. It also provides guidance for health monitoring of tunnel structure. The main body of this paper is tunnel lining structure under the action of high temperature fire. Numerical simulation is used as the main research means, especially from the shape of tunnel lining structure and the strength grade of lining concrete. The mechanical properties and stability of tunnel lining structures under high temperature fire are analyzed and studied in different fire scenarios, including the following aspects: (1) the general mechanical properties and damage rules of tunnel lining structures under the action of high temperature fire are analyzed and studied. The distribution of temperature field of lining structure is directly affected by the duration of fire and the range of fire, and the curve of damage law is fitted out. (2) considering the shape of tunnel section, The influence law of concrete strength grade and tunnel fire time on tunnel temperature field and stress field under high temperature fire, it is concluded that fire time is the main factor affecting lining temperature and displacement, tunnel section shape and concrete strength grade are secondary factors. (3) the temperature distribution and dynamic failure characteristics of lining structure under the action of fire protection layer are simulated and analyzed, and the effective protection measures are put forward. Finally, the lower the thermal conductivity of fire protection layer is obtained. The better the effect of heat insulation and temperature insulation is; (4) the feasibility and reliability of fire simulation of finite element software are obtained by using finite element software to simulate and analyze engineering examples.
【學(xué)位授予單位】：中國(guó)礦業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：U451.4

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 陳立道,王錦,吳曉宇;道路隧道火災(zāi)預(yù)防與控制研究[J];地下空間;2003年01期

2 洪麗娟,劉傳聚;隧道火災(zāi)研究現(xiàn)狀綜述[J];地下空間與工程學(xué)報(bào);2005年01期

3 閆治國(guó);朱合華;張建軍;;火災(zāi)對(duì)隧道襯砌結(jié)構(gòu)的損害及防范措施研究[J];地下空間與工程學(xué)報(bào);2006年04期

4 姚堅(jiān);朱合華;閆治國(guó);曾令軍;;隧道襯砌混凝土高溫后力學(xué)性能試驗(yàn)研究[J];地下空間與工程學(xué)報(bào);2007年01期

5 韓新;崔力明;;國(guó)內(nèi)外隧道火災(zāi)試驗(yàn)研究進(jìn)展簡(jiǎn)述[J];地下空間與工程學(xué)報(bào);2008年03期

6 閆治國(guó);朱合華;;隧道襯砌結(jié)構(gòu)火災(zāi)安全及高溫力學(xué)行為研究[J];地下空間與工程學(xué)報(bào);2010年04期

7 常岐;閆治國(guó);朱合華;郭銳;;火災(zāi)下隧道襯砌結(jié)構(gòu)力學(xué)行為的熱力耦合分析[J];地下空間與工程學(xué)報(bào);2010年S1期

8 閻善郁;劉巖;趙軼;;地鐵隧道火災(zāi)煙氣湍流反應(yīng)的數(shù)值模擬研究[J];大連交通大學(xué)學(xué)報(bào);2010年06期

9 丁蓬萊;王霆;張巍;;隧道火災(zāi)時(shí)空溫度場(chǎng)小波分析[J];防災(zāi)減災(zāi)工程學(xué)報(bào);2011年01期

10 寧波;劉永軍;;隧道結(jié)構(gòu)抗火研究進(jìn)展及趨勢(shì)[J];防災(zāi)減災(zāi)工程學(xué)報(bào);2012年S1期

本文編號(hào)：2121533