Abstract Despite their successful use in many bridges across several countries around the world, corrugated web steel girders (CWSGs) haven't been yet recognized formally by mainstream design codes and standards. CWSGs can be an economical alternative to conventional welded plate girders; they can achieve higher shear strengths with lesser material usage. Corrugated webs have been demonstrated to carry about half of their ultimate shear strength after buckling, which is an important reserve strength to overcome sudden collapses of bridge structures. The current design practice combines the latest research in the field with engineering judgment with no regard for reliability-based design. In light of the new developments in the field of bridge design and reliability analysis techniques, this paper revisits first the reliability of welded plate girders in shear and verifies their target reliability index and the corresponding resistance factor as per AASHTO LRFD. Then, and in an attempt to prepare the inclusion of CWSGs shear design in AASHTO LRFD, a probabilistic-based calibration procedure is applied to calibrate the resistance factor for bridges having a range of span lengths and girder spacings, with consideration of different average daily truck traffic. A series of sensitivity analyses were carried out in order to quantify the relative contribution of each design parameter to the overall reliability of CWSGs in shear. The findings of this study suggest that, for CWSGs in shear, a resistance factor of 0.95 is appropriate to ensure a reliability level that is consistently close to the target. The sensitivity analysis showed that the web thickness, web depth, and the yield strength of the web's steel material are the most influential parameters on the reliability index of CWSGs.

中文翻译：

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根据 AASHTO LRFD 进行基于可靠性的波纹腹板钢梁剪切设计

摘要 尽管波形腹板钢梁(CWSGs) 在世界多个国家的许多桥梁中得到成功应用，但尚未得到主流设计规范和标准的正式认可。CWSG 是传统焊接板梁的经济替代品；它们可以用更少的材料获得更高的剪切强度。波纹腹板已被证明在屈曲后承载其极限剪切强度的一半左右，这是克服桥梁结构突然倒塌的重要储备强度。当前的设计实践将该领域的最新研究与工程判断相结合，而不考虑基于可靠性的设计。鉴于桥梁设计和可靠性分析技术领域的新发展，本文首先回顾了焊接板梁在剪切中的可靠性，并根据 AASHTO LRFD 验证了其目标可靠性指标和相应的阻力系数。然后，为了准备在 AASHTO LRFD 中包含 CWSG 剪切设计，应用基于概率的校准程序来校准具有一系列跨长和梁间距的桥梁的阻力系数，并考虑到不同的平均每日卡车交通。进行了一系列敏感性分析，以量化每个设计参数对 CWSG 剪切整体可靠性的相对贡献。这项研究的结果表明，对于剪切中的 CWSG，0.95 的阻力系数是合适的，以确保始终接近目标的可靠性水平。