【摘要】：鋼-混凝土組合梁橋作為新興橋梁類型,近年來在大、中跨徑橋梁中得到廣泛應(yīng)用。然而,現(xiàn)行路面和橋梁設(shè)計規(guī)范缺少這一類橋梁的鋪裝層設(shè)計的詳細(xì)規(guī)定。近年來隨著我國交通量的顯著增加,鋪裝層出現(xiàn)了很多病害,造成了巨大的經(jīng)濟(jì)損失。橋面鋪裝的受力狀況與一般路面顯著不同,其工作狀態(tài)既有路面工程的特點,又有橋梁工程的特征。因此亟需從力學(xué)分析入手,建立一套完整的鋼-混凝土梁橋橋面鋪裝分析方法,為鋪裝層的設(shè)計提供指導(dǎo)。本文以京臺高速公路(北京段)工程瀛海鎮(zhèn)高架B段鋼-混凝土組合連續(xù)梁橋為背景,采用有限元分析方法,根據(jù)鋼-混凝土組合梁橋結(jié)構(gòu)特點,建立全橋模型,對鋪裝層受力狀況進(jìn)行了系統(tǒng)研究。首先,根據(jù)橋面鋪裝病害類型及其產(chǎn)生原因,考慮橋梁整體變形與局部車輪荷載的共同作用,得出橋梁墩頂位置處的鋼梁腹板頂部正對位置為荷載最不利作用位置,并據(jù)其應(yīng)力狀態(tài)將鋪裝上層表面縱向拉應(yīng)力、鋪裝上層表面縱向剪應(yīng)力、鋪裝層與橋面板層間剪應(yīng)力作為橋面鋪裝材料力學(xué)性能控制指標(biāo)。然后,通過計算比較橋面鋪裝在不同模量、不同厚度條件下的受力狀態(tài),分析了鋪裝層各參數(shù)對其各項力學(xué)指標(biāo)的影響,給出鋪裝層模量、厚度選擇建議。結(jié)合我國國情,探討了溫度變化、汽車荷載變化對鋪裝層受力的影響,總結(jié)了鋪裝層在惡劣條件下的受力規(guī)律。最后,把橋面鋪裝材料、結(jié)構(gòu)、氣候、超載等因素聯(lián)系在一起,提出了鋼-混凝土組合梁橋鋪裝層設(shè)計流程及方法。
[Abstract]:As a new type of bridge, steel-concrete composite beam bridge has been widely used in large and medium span bridges in recent years. However, the current pavement and bridge design codes lack detailed provisions for the pavement design of this kind of bridges. In recent years, with the significant increase of traffic volume in China, there are many diseases in pavement, resulting in huge economic losses. The stress state of bridge deck pavement is obviously different from that of general pavement. The working state of bridge deck pavement has the characteristics of both pavement engineering and bridge engineering. Therefore, it is urgent to establish a complete analysis method of steel-concrete bridge deck pavement from mechanical analysis to provide guidance for pavement design. In this paper, based on Yinghai elevated B Duan Gang concrete composite continuous beam bridge of Jingtai Expressway (Beijing Section), the full bridge model is established according to the structural characteristics of steel-concrete composite beam bridge by using finite element analysis method. The stress state of pavement is studied systematically. Firstly, according to the types of bridge deck pavement diseases and their causes, considering the joint action of bridge deformation and local wheel load, it is concluded that the top of steel beam web at the top of bridge pier is the most unfavorable position of load. According to its stress state, the longitudinal tensile stress on the upper surface, the longitudinal shear stress on the upper surface of the pavement and the shear stress between the pavement and the bridge deck are taken as the control indexes of the mechanical properties of the deck pavement. Then, by calculating and comparing the stress state of bridge deck pavement under different modulus and thickness, the influence of each parameter of pavement on its mechanical index is analyzed, and the suggestions of pavement modulus and thickness selection are given. Combined with the situation of our country, the influence of temperature change and vehicle load change on the stress of pavement is discussed, and the stress law of pavement under bad conditions is summarized. Finally, the design process and method of steel-concrete composite beam bridge pavement layer are put forward by connecting the factors of bridge deck pavement material, structure, climate, overload and so on.
【學(xué)位授予單位】：北京工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U443.33
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本文編號：2332555