Fatigue analysis of box-girder webs subjected to in-plane shear and transverse bending induced by railway traffic
Fatigue analysis of box-girder webs subjected to in-plane shear and transverse bending induced by railway traffic
复制标题
DOI：
10.1016/j.engstruct.2013.04.008
复制
发表时间：
2013-09
影响因子：
5.5
通讯作者：
Carlos Sousa;João Francisco Rocha;R. Calçada;A. S. Neves
中科院分区：
文献类型：
--
作者：
Carlos Sousa;João Francisco Rocha;R. Calçada;A. S. Neves
在分析细长钢筋混凝土箱形梁腹板时，必须考虑面内剪切和横向（面外）弯曲的影响。对于承受重要循环荷载的结构，如铁路桥面，还必须考虑疲劳。本文提出了一种考虑面内剪切和横向弯曲共同作用的钢筋混凝土梁腹板疲劳分析的数值方法。疲劳寿命的计算采用损伤累积法，这使得有可能分析变幅应力历史，由于真实的交通。所提出的方法的主要特点在于在箍筋和在网络混凝土的应力历史计算的算法。通过与文献中报道的实验结果的比较，验证了该算法的有效性，表明该方法提供了安全的结果。兴趣和实际后果，采用这种方法在新结构的疲劳分析说明通过应用到一个真实的案例研究。
The analysis of slender reinforced concrete box-girder webs, in bridge decks, must be carried out considering the effects of in-plane shear and transverse (out-of-plane) bending. In the case of structures subjected to important cyclic loads, such as railway bridge decks, fatigue must also be taken into account. This paper presents a numerical methodology for fatigue analysis of reinforced concrete girder webs, considering the combined effects of in-plane shear and transverse bending. Fatigue lives are calculated by using the damage accumulation method, which makes it possible to analyse variable amplitude stress histories due to real traffic. The main specificity of the proposed methodology lies in the algorithm for calculation of stress histories in the stirrups and in the web concrete. This algorithm is validated through the comparison with experimental results reported in the bibliography, which demonstrates that the proposed approach provides results on the safe side. The interest and practical consequences of employing this methodology in fatigue analyses of new structures are illustrated through the application to a real case study.