Deck slabs of skew girder bridges
Deck slabs of skew girder bridges
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斜梁桥桥面板
DOI：
10.1139/l95-060
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发表时间：
1995
期刊：
影响因子：
--
通讯作者：
A. C. Agarwal
中科院分区：
文献类型：
--
作者：
B. Bakht;A. C. Agarwal
加拿大规范允许设计梁上板桥梁的混凝土桥面板，考虑到这些板在集中车轮荷载下的内部拱作用。在满足一定规定条件的情况下，如果甲板板上有一层钢筋，下有一层钢筋，每层钢筋由一正交钢筋网构成，且每一方向钢筋的横截面面积至少为甲板板有效横截面面积的0.3%，则认为甲板板符合设计标准。对于斜度大于20°的桥梁的桥面板，规范要求在斜度支承附近的末端区域的最小配筋量加倍。模型试验表明，通过在水平面上提供具有高抗弯刚度的复合材料端隔膜，可以消除对这种增加的需求。在无钢筋加固的纤维混凝土甲板模型上进行了试验。
Canadian codes allow the design of concrete deck slabs of slab-on-girder bridges by taking account of the internal arching action that develops in these slabs under concentrated wheel loads in particular. Provided that certain prescribed conditions are met, a deck slab is deemed to have met the design criteria if it is provided with a top and a bottom layer of steel reinforcement with each layer consisting of an orthogonal mesh of steel bars in which the area of cross section of the bars in each direction is at least 0.3% of the effective area of cross section of the deck slab. For deck slabs of bridges having skew angles greater than 20°, the codes require the minimum amount of reinforcement to be doubled in the end zones near the skew supports. Model testing has shown that need for such an increase can be eliminated by providing composite end diaphragms with high flexural rigidity in the horizontal plane. The proposed concept is tested on a model of fibre-reinforced concrete deck without steel reinforce...