摘要
在正交异性钢桥面板中,横梁腹板与纵肋连接部位会因为各种原因而产生相互作用,包括横梁腹板的弯剪作用、横梁腹板对纵肋的面内支撑作用,这2种作用属于面内作用,另外还有不对称加载作用、相对纵向位移作用,这2种作用属于面外作用。通过对4种作用下设置纵肋小隔板和不设置纵肋小隔板的正交异性板结构各考察点主拉应力对比研究得到如下结论:(1)在面内作用下,设置纵肋小隔板可以提高横梁腹板与纵肋连接焊缝端部纵肋腹板的疲劳性能,但却增加了横梁腹板发生疲劳开裂的可能性;(2)在面外作用下,设置纵肋小隔板对正交异性板横梁腹板与纵肋连接焊缝端部的疲劳性能影响不大。
In orthotropic steel bridge deck, the mutual effects between the crossbeam web and the longitudinal rib may be resulted because of many factors, among which both the bending-shearing effect of crossbeam web and the in-plane supporting effect of crossbeam web on the longitudinal rib belong to in-plane effects, while both the unsymmetrical loading effect and the relative longitudinal displacement effect belong to out-of-plane effects. Through comparative study on principal tensile stresses of all investigated points of orthotropic steel bridge deck using longitudinal rib bulkhead and not using longitudinal rib bulkhead under the four effects, some conclusions are obtained ： 1 ） Under the action of in-plane effects, using longitudinal rib bulkhead can enhance anti-fatigue performance of longitudinal rib web near the end of weld joint between crossbeam web and longitudinal rib, but will increase the cracking possibility of the crossbeam web. 2） Under the action of out-of-plane effects, using longitudinal rib bulkhead has little effect on fatigue performance of orthotropic steel deck near the end of weld joint between crossbeam web and longitudinal rib.
出处
《铁道标准设计》
北大核心
2013年第3期66-70,共5页
Railway Standard Design
基金
铁道部重大课题子课题(2009G004-C-2)
关键词
正交异性钢桥面板
纵肋小隔板
疲劳
应力分析
orthotropic steel bridge deck
longitudinal rib bulkhead
fatigue
stress analysis
