THE INFLUENCE OF RESIDUAL WELD STRESSES ON THE BUCKLING BEHAVIOUR OF ARCH BRIDGES
Steel tied arch bridges form a frequently used design concept for medium span bridges in Belgium. One of the determining factors in the design of these bridges is the out-of-plane buckling behavior of the arches. While considerable international research has been undertaken, focusing on the determination of the geometrical imperfection, using non-destructive testing as well as by analytical calculation methods, the effect of residual weld stresses has not been studied in depth, becauseit has always been assumed that these residual stresses would have only limited influence on the buckling behavior, because of the considerable sizes of the arch sections. Still, this manuscript claims the residual stresses, which surely are present in the arches because of the welds connecting the arch plates, to be of importance,since they do influence the out-of-plane shape of the arch. The residual stresses are thus studied in much more detail. Firstly, a more fundamental approach is followed by developing a three-dimensional finite element model of the influence of the welding operation on the stress distribution in a typical arch section, using a detailed time-dependent model of the weld flux and the temperature dependent material behavior of the material during welding. In addition, the resulting residual weld stresses can be used as initial stresses for an elastic-plastic calculation of a finite element model of the entire bridge. This will allow for calculation the buckling behavior of an arch as realistically as possible, resulting in actual scientific proof of the influence of residual stresses on out-of-plane buckling.
tied arch bride buckling out-of-plane residual stresses
A Outtier H De Backer B De Pauw Ph.Van Bogaert
Ghent University, Belgium
国际会议
The 9th International Conference on Steel Space & Composite Structures(第九届国际钢材、空间结构、组合结构会议)
烟台·北京
英文
201-208
2007-10-10（万方平台首次上网日期，不代表论文的发表时间）