Structural Assessment of Concrete Bridges in Germany—Shear Resistance under Static and Fatigue Loading
Structural Assessment of Concrete Bridges in Germany—Shear Resistance under Static and Fatigue Loading
复制标题
德国混凝土桥梁的结构评估——静态和疲劳荷载下的抗剪强度
DOI：
--
复制
发表时间：
2015
期刊：
影响因子：
--
通讯作者：
J. Hegger
中科院分区：
文献类型：
--
作者：
F. Teworte;M. Herbrand;J. Hegger
摘要近几十年来，由于交通量和重量的增加，对桥梁承载能力的要求越来越高。在未来，预计会有更大的增长。由于德国现有的大部分桥梁建于20世纪60年代和70年代，因此对这些结构的评估被认为是至关重要的。因此，德国交通部于2011年推出了指导方针，与目前的德国桥梁设计规范相比，可以更准确地确定承载能力。然而，许多混凝土桥梁在抗剪和抗疲劳方面存在缺陷。因此，2015年发布了指南的补充，以纳入新的研究成果。本文介绍了考虑提供抗剪钢筋的静力和疲劳剪切验证方法。这些方法是指具有可变压杆倾角的桁架模型。此外，还介绍了典型路网箱梁桥的应用，说明了提高承载力设计值的潜力。
Abstract The demands on the load-carrying capacity of bridges have increased over the last few decades because of the higher traffic volumes and weights. In the future, an even greater increase is expected. Since a large part of the existing bridges in Germany was built in the 1960s and 1970s, the assessment of these structures is deemed crucial. Therefore, the German Ministry of Transport introduced guidelines in 2011 allowing for a more accurate determination of the bearing capacity compared to the current German bridge design code. Nevertheless, many concrete bridges show deficits in shear and fatigue resistance. Consequently, a supplement to the guideline was published in 2015 to incorporate new research results. This paper describes the approaches for static and fatigue shear verification that consider the provided shear reinforcement. These methods refer to a truss model with variable compression strut inclination. Further, an application to a typical box-girder bridge in the road network is presented, demonstrating the potential for increasing the design value of the bearing capacity.