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Prestressed Concrete Hollow Slab Bridge Deck Pavement Structure Performance Analysis

Author: ZhangJunWei
Tutor: ChenHuai
School: Zhengzhou University
Course: Structural Engineering
Keywords: Fabricated Hollow Slab Deck Pavement Deck Pavement disease Finite Element Analysis
CLC: U443.33
Type: Master's thesis
Year: 2007
Downloads: 228
Quote: 3
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Abstract

With the rapid development of China's transport services, traffic and heavy vehicles gradually increased, especially in recent years, serious overloading deck pavement of some of the more common diseases, not only impede traffic safety, affect the aesthetics of the bridge deck, also The maintenance work has brought great difficulties, resulting in enormous direct and indirect economic losses. Therefore, the bridge deck pavement problems in our country in recent years has been the universal attention, Deck Paving Technology has also become a bridge building needs to solve a technical problem. This paper the deck pavement various disease research, analysis of the reasons for the bridge deck pavement diseases, and proposed some measures to control the deck pavement diseases and mechanical indicators. Simply supported plate girder bridge has a wide range of large features on roads and bridges, the use of the finite element program MIDAS / Civil prefabricated prestressed concrete hollow slab bridge deck pavement the 3D element calculation model by analyzing Deck Pavement force characteristics of the vehicle loads, determine the horizontal and vertical most unfavorable load position, single-layer and double-layer steel mesh on the mechanical properties of the pavement layer vertical displacement and stress status, The results show that: the laying of double-layer steel mesh, so that the integrity of the pavement system to strengthen and increase the stiffness of the bridge deck pavement, improve the tensile properties of the bridge deck pavement, but for deck pavement shear The ability to raise little. In order to study the impact of pavement thickness Decks, divided into single-layer reinforced concrete pavement, a single layer of asphalt concrete pavement and double combination pavement situation analysis. The results show that: For single-layer pavement, with the increase in the thickness of the pavement layer, the overall stiffness of the pavement system gradually increased, the Pavement vertical displacement and various stress decreasing. Bunk pavement with reinforced concrete pavement layer thickness increases, the pavement of the vertical displacement of the asphalt surface and reinforced concrete pavement stress gradually decreases, however, with asphalt concrete pavement surface the layer thickness increases, the vertical displacement of the pavement layer, reinforced concrete pavement of the stress gradually decreases, while the asphalt surface force status showing diversity. To explore the impact of pavement layer elastic modulus Decks, divided into single-layer reinforced concrete pavement, a single layer of asphalt concrete pavement and double combination pavement situation analysis. The results show that: For single-layer pavement, as the pavement layer elastic modulus increases, the the pavement vertical displacement constantly decreases, but monolayer reinforced concrete pavement various stress changes, while the single-layer asphalt concrete pavement stress decreasing trend is obvious. With the increase of the elastic modulus of the reinforced concrete pavement layer bunk pavement, pavement layer vertical displacement continue to decrease, but the asphalt surface and reinforced concrete pavement stress are little changed. With the increase of the elastic modulus of asphalt concrete pavement surface layer, the shear stress of the asphalt surface and reinforced concrete pavement little change, but the asphalt surface of the normal stress and the first principal stress increases more. Summary of pavement layer elastic modulus Decks that pavement layer elastic modulus variation on the mechanical properties of Pavement little effect. The results of this analysis certain guiding significance for the design of the bridge and the bridge deck pavement, but also provide a theoretical reference for further development of the analysis of the bridge deck pavement research.

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CLC: > Transportation > Road transport > Bridges and Culverts > Bridges constructed > Superstructure > Bridge deck pavement
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