Interaction between Cross Frames and Girders
Interaction between Cross Frames and Girders
复制标题
交叉框架和大梁之间的相互作用
DOI：
10.1061/(asce)0733-9445(1990)116:5(1319
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发表时间：
1990
期刊：
影响因子：
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通讯作者：
Wassef E. Elmir
中科院分区：
文献类型：
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作者：
A. Bishara;Wassef E. Elmir
本文提出了一种计算多梁组合钢桥中、端横梁内力的三维有限元算法。将该算法应用于4座中跨[137ft(41.75m)]简支多梁切向四车道桥，中间横梁为X型，端部横梁为竖直Warren桁架。其中一座为右桥，其余为20°、40°和60°斜角。结果表明：(1)大多数中间交叉框架构件可产生压力和拉力；(2)最大压缩力出现在与外张弦梁端部相连的交叉框架对角线上，靠近桥梁的钝角；(3)最大拉力出现在跨中的交叉框架弦上；(4)对于20°或更小的斜交角，斜交的影响可以忽略不计；(5)斜交角度越大，交叉框架构件产生的最大力越大；(6)交叉框架构件的最大拉力越大。
This paper presents a three‐dimensional finite element algorithm for computing internal forces in intermediate and end cross frames of multibeam composite steel bridges. The developed algorithm was applied to four medium‐span [137 ft (41.75 m)] simply supported multigirder tangent four‐lane bridges, with X‐type intermediate cross frames and end cross frames of the Warren truss with verticals type. One was a right bridge and the others had 20°, 40°, and 60° skew angles. It was found that: (1) Most members of the intermediate cross frames may develop compressive and tensile forces; (2) maximum compressive forces occur in the cross‐frame diagonals attached to the ends of exterior stringers, close to the obtuse angles of the bridge; (3) maximum tensile forces occur in the cross‐frame chords, at midspan; (4) the effect of skew may be neglected for skew angles of 20° or less; (5) the higher the skew angle, the higher the maximum forces induced in the cross‐frame members; (6) the larger the cross‐frame members' ...