Comparative Analysis of Bridge Superstructure Deterioration
Comparative Analysis of Bridge Superstructure Deterioration
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DOI：
10.1061/(asce)0733-9445(1994)120:7(2123
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发表时间：
1994-07
期刊：
影响因子：
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通讯作者：
D. Veshosky;C. R. Beidleman;G. Buetow;Muge Demir
中科院分区：
文献类型：
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作者：
D. Veshosky;C. R. Beidleman;G. Buetow;Muge Demir
本文介绍了钢和预应力混凝土桥梁上部结构的劣化率的研究结果。该研究包括形成桥梁样本组，这些桥梁在特性方面是均匀的，而不是上部结构材料，这预计会影响退化率。上部结构的条件评级回归对年龄和平均每日交通量的样本组均质钢和预应力混凝土桥梁在全国作为一个整体，以及在七个州选择代表不同的地形和环境。结果表明，年龄是上层建筑退化的主要决定因素，其次是平均每日交通量。结构材料的选择不会显著影响上部结构的劣化率。研究还发现，桥梁上部结构的退化随着时间的推移呈凸函数的形式，随着桥梁的老化，观察到的退化速度会减慢。
This paper presents the results of a study of rates of deterioration of steel and prestressed concrete bridge superstructures. The study involved forming sample groups of bridges that were homogeneous in terms of characteristics, other than superstructure material, which were expected to influence rates of deterioration. Superstructure condition rating was regressed against age and average daily traffic for sample groups of homogeneous steel and prestressed concrete bridges in the nation as a whole, as well as in seven states selected to represent diverse terrains and environments. Results indicated that age is the primary determinant of superstructure deterioration, followed by average daily traffic. Choice of structural material does not significantly affect superstructure deterioration rates. The study also found that deterioration of bridge superstructures takes the form of a convex function over time, with the rate of observed deterioration slowing as a bridge ages.