【摘要】 传统正交异性钢桥面板因优点众多而得到广泛应用,但也存在构造复杂、焊缝较多、疲劳问题突出等难题。为改善正交异性钢桥面板的静力及疲劳性能,提出一种新型大纵肋正交异性-PBL剪力键组合桥面板。这种新型正交异性桥面板通过增大纵肋尺寸,减少纵肋数量,在钢桥面板上方焊接PBL剪力键替代传统栓钉剪力键,来提高桥面板局部刚度,减少焊缝数量,从而达到改善其静力和疲劳性能的目的。以某既有斜拉桥正交异性钢桥面板为例,采用有限元软件Midas/Civil和ANSYS对新型正交异性桥面板和传统正交异性钢桥面板的静力性能和疲劳性能进行对比仿真分析。研究结果表明:本文提出的新型正交异性桥面板静力性能和疲劳性能较传统正交异性桥面板更为出色。更多还原

【Abstract】 The traditional orthotropic steel deck has been widely used because of its many advantages, but there are also some problems such as complicated structure, many welds and prominent fatigue problems. In order to improve the static and fatigue performance of orthotropic steel deck, a new type of large longitudinal rib-PBL shear bond composite orthotropic steel deck was proposed in this paper. The new type of orthotropic steel deck can improve the local stiffness of the deck and reduce the number of welds by increasing the size of the longitudinal ribs, reducing the number of longitudinal ribs, and welding PBL shear bond over the steel deck instead of the traditional shear studs, so as to improve the static and fatigue performance of the deck. In this paper, taking the orthotropic steel deck of an existing cable-stayed bridge as an example, the finite element software Midas/Civil and ANSYS were used to compare the static and fatigue performance of the new type of orthotropic steel deck with the traditional orthotropic steel deck. The analysis results show that the static and the fatigue performance of the new type of orthotropic steel deck proposed in this paper is better than those of the traditional orthotropic steel deck.更多还原