本文選題：防火涂層 + 混凝土箱梁　； 參考：《長(zhǎng)安大學(xué)》2014年碩士論文

【摘要】：隨著我國(guó)國(guó)民經(jīng)濟(jì)和交通建設(shè)的迅速發(fā)展，交通事故的數(shù)量隨之增加，給交通基礎(chǔ)設(shè)施帶來(lái)風(fēng)險(xiǎn)。其中，由于火災(zāi)引起的橋梁損害也逐漸引起了廣泛關(guān)注。橋梁發(fā)生火災(zāi)的概率不大，但其引起的橋梁損害能夠?qū)ι?cái)產(chǎn)安全造成巨大損失。通�？梢圆捎迷诨炷翗蛄簶�(gòu)件外側(cè)噴涂防火涂層的措施，降低橋梁因火災(zāi)受損的概率，從而提高橋梁的耐火性能。 本文采用有限元分析方法，主要對(duì)在火災(zāi)作用下受防火涂層保護(hù)的混凝土箱梁溫度場(chǎng)進(jìn)行分析研究。主要的研究?jī)?nèi)容如下： （1）借鑒國(guó)內(nèi)外學(xué)者對(duì)混凝土高溫?zé)峁?shù)和高溫力學(xué)性能的大量研究成果，對(duì)其進(jìn)行對(duì)比分析，最終確定混凝土箱梁截面在火災(zāi)高溫場(chǎng)時(shí)所需的材料熱工參數(shù)及高溫力學(xué)性能，為之后的計(jì)算分析墊定基礎(chǔ)。 （2）歸納總結(jié)傳熱學(xué)基本理論，得出橋梁火災(zāi)溫度場(chǎng)所采用的熱分析方法；總結(jié)不同的火災(zāi)升溫曲線，通過(guò)對(duì)各個(gè)升溫曲線的升溫趨勢(shì)及其使用范圍進(jìn)行對(duì)比分析，選取一種適宜于橋梁火災(zāi)情況的升溫曲線模擬橋梁火災(zāi)場(chǎng)場(chǎng)景。 （3）通過(guò)確定的混凝土熱工參數(shù)及熱分析方法，，應(yīng)用有限元分析軟件ANSYS建立求解三面不含翼緣板受防火涂層保護(hù)的混凝土箱梁溫度場(chǎng)有限元模型，分析防火涂料的導(dǎo)熱系數(shù)和涂層厚度對(duì)混凝土箱梁截面溫度場(chǎng)分布規(guī)律的影響。采用易語(yǔ)言程序研發(fā)“不同防火材料保護(hù)下混凝土箱梁火災(zāi)溫度場(chǎng)分析及計(jì)算系統(tǒng)V1.0”。 （4）通過(guò)ANSYS進(jìn)行溫度場(chǎng)數(shù)值模擬分析，以橋梁耐火等級(jí)為依據(jù)，計(jì)算使用不同導(dǎo)熱系數(shù)的防火涂料對(duì)混凝土箱梁截面進(jìn)行保護(hù)時(shí)涂層的理論厚度值。結(jié)合研究?jī)?nèi)容與成果，采用易語(yǔ)言編程軟件編譯“混凝土箱梁防火涂層理論厚度計(jì)算系統(tǒng)V1.0”。
[Abstract]:With the rapid development of national economy and traffic construction, the number of traffic accidents increases, which brings risks to traffic infrastructure. Among them, the bridge damage caused by fire has gradually aroused widespread concern. The probability of bridge fire is small, but the damage caused by bridge damage can cause huge loss to life and property safety. The fire resistant coating on the outside of concrete bridge members can be used to reduce the probability of damage caused by fire and improve the fire resistance of the bridge. In this paper, the finite element analysis method is used to analyze the temperature field of concrete box girder protected by fire resistant coating. The main contents of the study are as follows: 1) draw lessons from a large number of research results of high temperature thermal parameters and high temperature mechanical properties of concrete made by domestic and foreign scholars, compare and analyze them, and finally determine the material thermal parameters and high temperature mechanical properties of concrete box girder section in fire high temperature field. Lay the foundation for the subsequent calculation and analysis. 2) summing up the basic theory of heat transfer, obtaining the thermal analysis method used in bridge fire temperature field, summarizing different fire heating curves, comparing and analyzing the heating trend of each heating curve and its application scope. A kind of heating curve suitable for bridge fire is selected to simulate the scene of bridge fire field. Through the determined thermal parameters and thermal analysis method of concrete, the finite element model of temperature field of concrete box girder without flange plate protected by fire resistance coating is established by using finite element analysis software ANSYS. The influence of thermal conductivity and coating thickness on the distribution of temperature field of concrete box girder is analyzed. The system V1.0 for analyzing and calculating the fire temperature field of concrete box girder under the protection of different fire-proof materials is developed by easy language program. 4) numerical simulation analysis of temperature field is carried out by ANSYS. Based on the fire resistance grade of bridge, the theoretical thickness of the coating is calculated when the section of concrete box girder is protected by fire resistant coating with different thermal conductivity. Based on the research contents and results, the theoretical thickness calculation system V1.0 of concrete box girder anti-fire coating is compiled by easy language programming software.
【學(xué)位授予單位】：長(zhǎng)安大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U445.7

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 張建榮;周元強(qiáng);林建萍;劉照球;;混凝土結(jié)構(gòu)對(duì)流換熱效應(yīng)的研究[J];四川建筑科學(xué)研究;2007年03期

2 余志武,丁發(fā)興,羅建平;高溫后不同類型混凝土力學(xué)性能試驗(yàn)研究[J];安全與環(huán)境學(xué)報(bào);2005年05期

3 張崗;賀拴海;宋一凡;周勇軍;;鋼筋混凝土梁橋火災(zāi)高溫安全評(píng)價(jià)[J];安全與環(huán)境學(xué)報(bào);2008年03期

4 朱合華;閆治國(guó);梁利;沈奕;;不同火災(zāi)升溫曲線下隧道內(nèi)溫度場(chǎng)分布規(guī)律研究[J];地下空間與工程學(xué)報(bào);2012年S1期

5 單月圓;焦寶祥;;膨脹型防火涂料的研究進(jìn)展[J];材料導(dǎo)報(bào);2009年S1期

6 張崗;張鵬;郭琦;閆磊;;鋼筋混凝土T梁火災(zāi)高溫時(shí)變效應(yīng)研究[J];水利與建筑工程學(xué)報(bào);2008年02期

7 孫莉;劉釗;;2000～2008年美國(guó)橋梁倒塌案例分析與啟示[J];世界橋梁;2009年03期

8 陳榮毅,沈祖炎;鋼筋混凝土結(jié)構(gòu)抗火設(shè)計(jì)述評(píng)[J];工業(yè)建筑;1999年08期

9 鄭文忠,許名鑫,王英;鋼筋混凝土及預(yù)應(yīng)力混凝土材料抗火性能[J];哈爾濱建筑大學(xué)學(xué)報(bào);2002年04期

10 吳波;洪洲;;鋼筋混凝土簡(jiǎn)支梁的耐火極限[J];華南理工大學(xué)學(xué)報(bào)(自然科學(xué)版);2006年07期

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