Effective flange width provisions for composite steel bridges
Effective flange width provisions for composite steel bridges
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DOI：
10.1016/j.engstruct.2004.07.009
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发表时间：
2004-10
影响因子：
5.5
通讯作者：
I. Ahn;Methee Chiewanichakorn;Stuart S. Chen;A. Aref
中科院分区：
文献类型：
--
作者：
I. Ahn;Methee Chiewanichakorn;Stuart S. Chen;A. Aref
在桥梁钢-混凝土组合梁的分析和设计中，挠度、应力和强度通常是通过利用有效翼缘宽度的概念从基本梁弯曲理论中获得的。剪力滞效应是间接的，通过用适当的减少的“有效”宽度代替实际板宽度。除了桥梁数值分析所能给出的精确数值外，规范条款还必须提供评估有效翼缘宽度的简化实用方法，而不会显著降低精度。因此，每个代码实现不同的想法和方法来指定有效的翼缘宽度。比较它们突出了不同的哲学基础的各种有效的宽度代码配方，这是本文的主要目标。介绍并比较了美国、英国、加拿大、日本和欧盟委员会对有效翼缘宽度的规定。对每项规定的特点作了简要说明和总结。简支跨和连续跨负弯矩区的数值比较如下。本文件最后总结了所有这些条款的共同点和主要区别。
In the analysis and design of steel–concrete composite girders of a bridge, deflections, stresses, and strengths are typically obtained from elementary beam bending theory by utilizing the effective flange width concept. Shear lag effects are accounted for indirectly, by replacing the actual slab width by an appropriate reduced “effective” width. Besides the exact numerical values that can be given by numerical analysis of a bridge, it is necessary that code provisions should provide simplified practical method of evaluation of effective flange width without significant loss of accuracy. So each code implements different ideas and approaches for specifying effective flange width. Comparing them highlights distinct philosophies underlying the various effective width code formulations, which is the main objective of this paper. In this paper, the effective flange width provisions in the US, Britain, Canada, Japan, and European Committee are presented and compared. Characteristics of each provision are briefly described and summarized. Numerical comparisons for simply-supported spans and negative moment regions of continuous spans follow. The paper concludes with a summary outlining the commonalities and main differences among all these provisions.