Cold Curving Steel Bridge Girders
Cold Curving Steel Bridge Girders
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冷弯钢桥大梁
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
R. Sen
中科院分区：
文献类型：
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作者：
A. Gergess;R. Sen
水平弯曲钢梁广泛应用于桥梁建设中。概述了一种用于弯曲钢梁的创新冷弯技术，该技术是专门为满足佛罗里达州迈阿密 Metromover 严格的施工公差要求而开发的。保留了制造商使用的弯曲程序，并开发了详细的分析，以提供与弯曲对称、非对称、加劲和非加劲梁的变形有关的封闭形式解决方案。这消除了钢铁车间操作中的试错性质。对最大载荷和相应的塑性应变施加限制，以防止损坏。数值例子说明了所提出的方法的应用，并就如何使冷弯适用于桥梁使用对未来的工作提出了建议。
Horizontally curved steel girders are extensively used in bridge construction. An overview on a new, innovative cold bending technique for curving steel girders, specifically developed to meet the tight construction tolerance requirements of the Miami, Florida, Metromover, is presented. The curving procedure used by the fabricator was retained and detailed analyses were developed to provide closed-form solutions relating loads to deformation for curving symmetrical, asymmetrical, stiffened, and unstiffened girders. This eliminates the trial-and-error nature of the operation in the steel shop. Limits are imposed on the maximum load and corresponding plastic strain to prevent damage. Numerical examples illustrate the application of the proposed method and suggestions for future work are made on how cold bending may be adapted for bridge use.