本文選題：瀝青混合料 + 瀝青砂漿　； 參考：《哈爾濱工業(yè)大學(xué)》2017年碩士論文

【摘要】：瀝青路面是我國(guó)高速公路的主要結(jié)構(gòu)形式,瀝青混合料作為外部結(jié)構(gòu)物,時(shí)刻與各種形態(tài)的水分接觸,加之行車(chē)荷載的聯(lián)合作用,致使材料內(nèi)部的微缺陷逐漸萌生、擴(kuò)展直至造成不可逆的材料或宏觀(guān)力學(xué)性能的劣化,最終導(dǎo)致路面結(jié)構(gòu)的破壞。需要注意的是,一方面,道路工程一直采用連續(xù)均質(zhì)的方法研究瀝青混合料的力學(xué)行為,這與瀝青混合料本身的結(jié)構(gòu)組成不符,未考慮細(xì)觀(guān)特征對(duì)整體宏觀(guān)性能的影響。另一方面,對(duì)于水對(duì)瀝青路面材料的作用,人們往往聯(lián)系為瀝青路面的水損害,忽略了在形成水損害的過(guò)程中,由于水分存在對(duì)材料性能影響,加之荷載及周?chē)h(huán)境的聯(lián)合作用,瀝青混合料材料性能的局部弱化和失效。因此,有必要將瀝青混合料的細(xì)觀(guān)結(jié)構(gòu)特征考慮進(jìn)來(lái),分析在水分存在的情況下,荷載作用下的瀝青混合料內(nèi)部材料性能的局部損傷或失效。首先,基于工業(yè)X-ray CT掃描和數(shù)字圖像處理技術(shù),建立考慮真實(shí)細(xì)觀(guān)結(jié)構(gòu)的瀝青混合料三維有限元模型,通過(guò)空隙率等體積指標(biāo)驗(yàn)證了模型的組成正確性;基于瀝青混合料三維重構(gòu)成果,揭示了復(fù)雜孔隙結(jié)構(gòu)下瀝青混合料內(nèi)部水分流動(dòng)場(chǎng)的分布規(guī)律,獲取了流速、飽和度等關(guān)鍵信息。其次,采用動(dòng)態(tài)力學(xué)測(cè)試方法,對(duì)不同水環(huán)境下的典型級(jí)配瀝青砂漿進(jìn)行頻率掃描試驗(yàn)和切口小梁三點(diǎn)彎曲試驗(yàn),研究水分的存在對(duì)瀝青砂漿材料性能的影響規(guī)律,并獲取相關(guān)黏彈參數(shù)和斷裂力學(xué)參數(shù);基于水流場(chǎng)分布和水分對(duì)材料性能影響規(guī)律,采用擴(kuò)展有限元方法(XFEM)分析荷載作用下瀝青混合料的響應(yīng)規(guī)律和局部損傷。結(jié)果表明,水分的存在會(huì)顯著加劇瀝青混合料的材料損傷。最后,以動(dòng)態(tài)模量為評(píng)價(jià)指標(biāo)研究水分的存在對(duì)瀝青混合料整體材料性能的影響規(guī)律;以劈裂強(qiáng)度為評(píng)價(jià)指標(biāo)研究長(zhǎng)期浸水對(duì)瀝青混合料整體材料性能的影響規(guī)律;與有限元模擬的結(jié)果相結(jié)合,研究細(xì)觀(guān)尺度域下瀝青混合料損傷規(guī)律。本文分析由于水分的存在對(duì)瀝青混合料整體性能造成的影響,揭示在水-荷載耦合狀態(tài)下瀝青混合料的局部材料響應(yīng)及損傷規(guī)律。為研究水對(duì)瀝青混合料的作用提供了新思路,也為研究路面材料的破壞機(jī)理奠定基礎(chǔ)。
[Abstract]:Asphalt pavement is the main structural form of highway in our country. As an external structure, asphalt mixture is always in contact with various forms of water, combined with the combined action of driving load, which results in the gradual initiation of micro-defects in the material. Expansion results in irreversible deterioration of material or macroscopic mechanical properties, which ultimately leads to pavement structure damage. It should be noted that, on the one hand, road engineering has been using the method of continuous homogeneity to study the mechanical behavior of asphalt mixture, which does not accord with the structural composition of asphalt mixture, and does not take into account the effect of meso characteristics on the overall macro performance. On the other hand, for the effect of water on asphalt pavement materials, people often relate to the water damage of asphalt pavement. Combined with load and surrounding environment, the local performance of asphalt mixture is weakened and invalidated. Therefore, it is necessary to take into account the meso-structural characteristics of asphalt mixture, and analyze the local damage or failure of the internal material performance of asphalt mixture under the condition of moisture. Firstly, based on industrial X-ray CT scanning and digital image processing technology, a three-dimensional finite element model of asphalt mixture considering real mesoscopic structure is established, and the validity of the model is verified by volume index such as voidage. Based on the results of 3D reconstruction of asphalt mixture, the distribution law of water flow field in asphalt mixture with complex pore structure is revealed, and the key information such as velocity and saturation are obtained. Secondly, using dynamic mechanical test method, the frequency scanning test and notch trabecular three-point bending test of typical graded asphalt mortar under different water environment are carried out to study the influence of moisture content on the performance of asphalt mortar. Based on the distribution of water flow field and the effect of water content on material performance, the response law and local damage of asphalt mixture under load are analyzed by extended finite element method (EFEM). The results show that the presence of moisture will significantly aggravate the material damage of asphalt mixture. Finally, the dynamic modulus is taken as the evaluation index to study the influence law of the existence of moisture on the performance of asphalt mixture, and the splitting strength is taken as the evaluation index to study the effect of long-term water immersion on the performance of asphalt mixture. Combined with the results of finite element simulation, the damage law of asphalt mixture in mesoscale range is studied. In this paper, the influence of moisture on the whole performance of asphalt mixture is analyzed, and the local material response and damage law of asphalt mixture under water-load coupling state are revealed. It provides a new way to study the effect of water on asphalt mixture and lays a foundation for studying the failure mechanism of pavement material.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：U414

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 李佳;萬(wàn)成;蔡旭;;基于數(shù)字圖像相關(guān)方法的瀝青混合料顆粒運(yùn)動(dòng)軌跡分析[J];武漢理工大學(xué)學(xué)報(bào)(交通科學(xué)與工程版);2015年03期

2 盛燕萍;萬(wàn)成;李海濱;青維;;瀝青混合料CT圖像中粘連集料顆粒分離方法[J];建筑材料學(xué)報(bào);2015年04期

3 王林;徐青;;基于蒙特卡羅隨機(jī)有限元法的三維隨機(jī)滲流場(chǎng)研究[J];巖土力學(xué);2014年01期

4 田冬梅;鄧德華;田青;潘云瑞;唐斯;;水對(duì)水泥乳化瀝青砂漿動(dòng)態(tài)力學(xué)性能的影響[J];硅酸鹽學(xué)報(bào);2013年11期

5 胡靖;錢(qián)振東;;環(huán)氧瀝青混合料細(xì)觀(guān)尺度水損壞特性[J];東南大學(xué)學(xué)報(bào)(自然科學(xué)版);2013年02期

6 陳俊;汪林兵;黃曉明;;Micromechanical modeling of asphalt concrete fracture using a user-defined three-dimensional discrete element method[J];Journal of Central South University;2012年12期

7 萬(wàn)成;張肖寧;賀玲鳳;王端宜;張吉慶;;基于真實(shí)細(xì)觀(guān)尺度的瀝青混合料三維重構(gòu)算法[J];中南大學(xué)學(xué)報(bào)(自然科學(xué)版);2012年07期

8 陳俊;黃曉明;;采用離散元方法評(píng)價(jià)集料的骨架結(jié)構(gòu)[J];東南大學(xué)學(xué)報(bào)(自然科學(xué)版);2012年04期

9 萬(wàn)成;張肖寧;賀玲鳳;王紹懷;段躍華;;瀝青混合料動(dòng)態(tài)模量數(shù)值預(yù)測(cè)方法[J];中國(guó)公路學(xué)報(bào);2012年04期

10 蔣澤民;高俊啟;季天劍;盛余祥;張春海;徐姣;;壓電傳感器測(cè)量路面動(dòng)水壓力研究[J];傳感器與微系統(tǒng);2012年04期

相關(guān)博士學(xué)位論文 前2條

1 胡靖;基于瀝青混凝土三維細(xì)觀(guān)結(jié)構(gòu)的路面性能及安全評(píng)估研究[D];東南大學(xué);2015年

2 潘寶峰;動(dòng)水壓力作用下路面材料損傷的評(píng)價(jià)方法研究[D];大連理工大學(xué);2010年

相關(guān)碩士學(xué)位論文 前4條

1 姚形傲;非冰凍條件下瀝青混合料滲流機(jī)理研究[D];哈爾濱工業(yè)大學(xué);2014年

2 胡樂(lè)生;基于細(xì)觀(guān)模型的混凝土開(kāi)裂過(guò)程數(shù)值研究[D];浙江大學(xué);2011年

3 宮麗麗;顆粒型多孔介質(zhì)非線(xiàn)性滲流特性的實(shí)驗(yàn)研究[D];東北大學(xué);2009年

4 朱蔚;基于激光掃描數(shù)據(jù)的物體表面重建及輪廓顯示[D];哈爾濱工程大學(xué);2005年

，

本文編號(hào)：1782091