【摘要】：空心板橋是目前橋梁建設(shè)中使用率較高的橋型之一,而橋面鋪裝層對(duì)于橋梁結(jié)構(gòu)自身,起到了保護(hù)橋面板、改善橋梁上部結(jié)構(gòu)耐久性并提高使用年限的作用。橋面鋪裝處于橋梁與道路兩個(gè)專(zhuān)業(yè)的交叉領(lǐng)域。長(zhǎng)期以來(lái),其重要性沒(méi)有得到應(yīng)有的重視,相較于橋梁結(jié)構(gòu)和道路工程方向近些年的高速發(fā)展,橋梁鋪裝層的研究卻相對(duì)滯后。加之空心板橋結(jié)構(gòu)具有一定特殊性,其鋪裝層在實(shí)際運(yùn)營(yíng)過(guò)程中損壞較為嚴(yán)重。因此,為了改善空心板橋鋪裝層的受力性能,延長(zhǎng)空心板橋的使用壽命,對(duì)其鋪裝層進(jìn)行研究顯得十分必要�？招陌鍢蜾佈b層的受力狀況十分復(fù)雜,其力學(xué)特性不但受到自身材料的限制,還受到外界環(huán)境溫度、荷載條件的影響,所以對(duì)空心板橋鋪裝層的力學(xué)分析必須考慮各種因素的綜合作用。本文利用有限元分析軟件ANSYS建立了空心板橋的三維實(shí)體單元模型,通過(guò)在不同位置布置車(chē)輛荷載,確定其橫橋向和順橋向的荷載最不利位置。并在此基礎(chǔ)上,系統(tǒng)的研究了可能對(duì)鋪裝層受力性能造成影響的一系列因素,分別討論了瀝青面層及混凝土鋪裝層的厚度和彈性模量、鉸縫混凝土模量、梁體混凝土模量、梁體均勻升溫降溫和正、反溫度梯度作用下的鋪裝層受力情況,并系統(tǒng)探討了每一種影響因素對(duì)空心板橋鋪裝層的受力規(guī)律可能產(chǎn)生的影響。本文的分析結(jié)果對(duì)于空心板橋及其橋面鋪裝層的設(shè)計(jì)有一定的參考價(jià)值,也對(duì)進(jìn)一步研究空心板橋橋面鋪裝問(wèn)題具有指導(dǎo)意義。
[Abstract]:The hollow slab bridge is one of the bridge types with high utilization rate in the bridge construction at present, and the deck pavement plays the role of protecting the bridge deck, improving the durability of the bridge superstructure and increasing the service life for the bridge structure itself. Deck pavement is located in the intersection of bridge and road. For a long time, the importance of bridge pavement has not received due attention. Compared with the rapid development of bridge structure and road engineering in recent years, the study of bridge pavement is relatively lagging behind. In addition, the hollow slab bridge structure has some particularity, the pavement is damaged seriously in the actual operation process. Therefore, in order to improve the mechanical performance of hollow slab bridge pavement and prolong the service life of hollow slab bridge, it is necessary to study its pavement. The mechanical properties of the pavement of hollow slab bridge are not only limited by its own materials, but also affected by the external environment temperature and load conditions. Therefore, the mechanical analysis of hollow slab bridge pavement must consider the comprehensive effect of various factors. In this paper, the three-dimensional solid element model of hollow slab bridge is established by using the finite element analysis software ANSYS. The most disadvantageous position of the load on the transverse bridge and the downstream bridge is determined by arranging the vehicle load in different positions. On this basis, a series of factors which may affect the mechanical performance of pavement are systematically studied. The thickness and elastic modulus of asphalt surface and concrete pavement, the modulus of hinged joint concrete and the modulus of beam concrete are discussed respectively. Under the action of uniform heating and cooling and positive and inverse temperature gradient, the stress of the pavement is studied systematically, and the possible influence of each influencing factor on the stress law of the pavement of hollow slab bridge is discussed systematically. The analysis results of this paper have some reference value for the design of hollow slab bridge and its deck pavement, and also have guiding significance for further study of hollow slab bridge deck pavement.
【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】：2015
【分類(lèi)號(hào)】：U443.33

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