摘要
针对目前尚无整体式桥台无缝桥梁抗洪性能研究的现状,通过有限元软件MIDAS/Civil对福建永春上坂大桥的受力性能进行分析,并将分析结果与实桥的静载试验结果进行比较,验证了模型的正确性.以上坂大桥为原型,建立了相同上部结构形式、不同跨数的无缝与有缝桥梁的有限元模型,并对各桥的支座反力、桥墩内力以及墩顶位移等进行比较和分析.通过比较得出:当跨数大于2跨时,整体式桥台无缝桥梁在洪水作用下弹性阶段的受力特性能优于普通有缝桥梁;当将跨数减少至2跨后,整体式桥台无缝桥梁的竖向受力和横桥向的受力明显优于有缝桥梁.分析结果表明,跨数大于2跨使得整体式桥台无缝桥梁的优势在弹性阶段不能充分发挥;当桥梁的跨数为单跨或2跨时,整体式桥台无缝桥梁在弹性阶段的受力性能和抗倒塌能力相对于有缝桥梁都有明显的提高.
With the problem of lacking flooding- resistant performance research, a finite element model （FEM） of integral abutment jointless bridge, the Shangban bridge of Yongchun, was estab- lished by MIDAS CIVIL and was compared with static loading test from real bridge to verify the model＇ s validity. Then make it compared with the model of joint bridge which was remoulded from Shangban bridge. Finally, some conclusions are obtained from above analysis. The flooding -resistant performance of integral abutment jointless bridge are little better than those in joint bridge. But when the spans number are changed into 2, the superstructure performance whether in longitudinal or trans- verse are more reasonable than those in joint bridge. More spans cannot make jointless bridge full use of the advantages of integral abutment, and there is no much span can effectively improve flooding - resistant performance of the bridge.
出处
《福州大学学报（自然科学版）》
CAS
北大核心
2016年第4期472-479,486,共9页
Journal of Fuzhou University(Natural Science Edition)
基金
国家自然科学基金资助项目(51278126
51578161)
福建省自然科学基金资助项目(2013J01187)
关键词
整体式桥台无缝桥梁
有缝桥梁
抗洪性能
静载试验
integral abutment jointless bridge
joint bridge
flooding -resistant performance
static loading test
