本文選題：鋼橋面鋪裝 + 組合結(jié)構(gòu)　； 參考：《重慶交通大學(xué)》2015年碩士論文

【摘要】：隨著我國(guó)公路的高速發(fā)展,大跨徑鋼橋在公路運(yùn)輸中起著越來越重要的作用,而正交異性鋼橋面板有著質(zhì)量輕,施工期短,結(jié)構(gòu)性能優(yōu)良等特點(diǎn),受到越來越多大跨徑鋼橋設(shè)計(jì)者的青睞。澆注式瀝青混凝土因其優(yōu)良的抗老化性、抗疲勞性、防水性以及追隨正交異性鋼橋面板變形的能力,使其經(jīng)常被使用于正交鋼橋面鋪裝,在歐洲以及日本的大跨徑鋼橋面鋪裝中也有著極其廣泛的應(yīng)用。經(jīng)過十余年的研究與實(shí)踐證明,鋼橋面瀝青鋪裝層的病害不僅僅是瀝青混合料的材料性能問題,因?yàn)椴徽摬牧闲阅苋绾蝺?yōu)良,畢竟有其局限性,而鋪裝的支撐面剛性不足或不均勻卻能嚴(yán)重地抵消材料在性能上的提升。因此,研究澆注式瀝青混凝土的疲勞性能應(yīng)該把它與鋼橋面板結(jié)合起來研究。本文通過對(duì)德國(guó)和日本評(píng)定澆注式瀝青路用性能的方法進(jìn)行了分析,并結(jié)合我國(guó)氣候情況及澆注式瀝青混合料應(yīng)用情況,認(rèn)為日本用車轍動(dòng)穩(wěn)定度來衡量澆注式瀝青混合料熱穩(wěn)定性的方法缺乏控制性,因此認(rèn)為采用貫入度以及貫入度增量的試驗(yàn)方法作為熱穩(wěn)定性的控制指標(biāo)更加符合我國(guó)的情況,并根據(jù)不同氣候分區(qū)分別提出技術(shù)要求,同時(shí)以流動(dòng)性指標(biāo)反映澆注式瀝青混合料的和易性,要求240℃時(shí)不宜大于60s。在研究澆注式瀝青混凝土的疲勞損傷時(shí),主要根據(jù)正交異性鋼橋面鋪裝結(jié)構(gòu)受力的特性,對(duì)比分析了國(guó)內(nèi)外疲勞試驗(yàn)?zāi)Ｐ偷募虞d方式和破壞特點(diǎn);以研究鋪裝材料的疲勞性能為目的,選取東南大學(xué)三點(diǎn)加載疲勞實(shí)驗(yàn)?zāi)Ｐ?建立了與實(shí)橋受力特點(diǎn)一致的鋼橋面鋪裝組合結(jié)構(gòu)體(由正交異性板和澆注式瀝青混凝土組成)測(cè)試模型。該模型可以表征實(shí)橋正交異性鋼橋面體系的結(jié)構(gòu)特性,反應(yīng)鋼橋面鋪裝的真實(shí)形變特性,并可以對(duì)鋪裝體系的疲勞特性進(jìn)行統(tǒng)一、快速、有效的評(píng)估。而后運(yùn)用Chaboche和Lemaitre提出了疲勞損傷演化模型,從力學(xué)近似法的角度出發(fā)推導(dǎo)出單一瀝青矩形截面梁的疲勞壽命模型。再運(yùn)用抗彎剛度等效的原理簡(jiǎn)化復(fù)合結(jié)構(gòu)體為單一矩形截面梁,將鋼板轉(zhuǎn)化為瀝青鋪裝層疊加至矩形截面梁上,從而推導(dǎo)出復(fù)合結(jié)構(gòu)的疲勞壽命模型。最后在實(shí)驗(yàn)室成型由組合結(jié)構(gòu)體測(cè)試模型,采用UTM-100伺服液壓瀝青混合料動(dòng)態(tài)疲勞試驗(yàn)系統(tǒng)進(jìn)行疲勞實(shí)驗(yàn),并收集相應(yīng)數(shù)據(jù),對(duì)實(shí)驗(yàn)數(shù)據(jù)進(jìn)行分析和整理后用于對(duì)組合結(jié)構(gòu)疲勞壽命的理論模型中的參數(shù)進(jìn)行擬合求解,最后完善復(fù)合結(jié)構(gòu)的疲勞壽命模型。
[Abstract]:With the rapid development of highway in our country, long span steel bridge plays a more and more important role in highway transportation, and orthotropic steel bridge face plate has the characteristics of light weight, short construction period, excellent structure performance, etc. It is favored by more and more designers of long span steel bridges. Due to its excellent aging resistance, fatigue resistance, waterproofing and the ability to follow the deformation of orthotropic steel bridge panels, cast asphalt concrete is often used in orthotropic steel deck pavement. It is also widely used in long span steel deck pavement in Europe and Japan. After more than ten years of research and practice, it has been proved that the disease of asphalt pavement on steel bridge deck is not only the problem of material performance of asphalt mixture, because no matter how good the material performance is, after all, it has its limitations. However, the rigidity of the supporting surface of the pavement is insufficient or uneven, but it can seriously counteract the improvement of the properties of the material. Therefore, the fatigue performance of cast asphalt concrete should be combined with steel bridge slab. In this paper, the methods of evaluating the performance of pouring asphalt in Germany and Japan are analyzed, and the climate of our country and the application of pouring asphalt mixture are analyzed. It is considered that the method of measuring the thermal stability of pouring asphalt mixture by rutting stability in Japan is lack of controllability. Therefore, it is considered that the test method of penetration and penetration increment as the control index of thermal stability is more suitable for the situation of our country. According to different climate zones, the technical requirements are put forward, and the flowability index is used to reflect the portability of pouring asphalt mixture, which should not be greater than 60 s at 240 鈩，

本文編號(hào)：1965104