正交异性钢箱梁U型肋加劲板极限承载力试验  

Experiment on Ultimate Bearing Capacity of U-stiffened Plate of Orthotropic Steel Box Girder

作　　者：狄谨[1] 周绪红[1,2] 吕忠达[1] 乔朋[1] 宁立[1] 

机构地区：[1]长安大学公路学院,陕西西安710064 [2]兰州大学土木工程与力学学院,甘肃兰州730000

出　　处：《中国公路学报》2009年第2期59-64,共6页China Journal of Highway and Transport

基　　金：国家自然科学基金项目(50608005)

摘　　要：以杭州湾跨海大桥通航孔斜拉桥钢箱梁U型肋加劲板为研究对象,按照相似理论设计制作了9块缩尺比例为1∶3的扁平钢箱梁闭口U型肋加劲板模型,通过极限承载力试验研究加劲板稳定极限承载力。研究结果表明:9块加劲板模型在轴向荷载作用下发生的失稳破坏形态主要有3种,即母板破坏、母板与加劲肋共同破坏以及加劲肋破坏;各种破坏形态下模型的位移与应变具有相似的变化规律;模型的极限承载力随母板和加劲肋厚度的增加而增大,随着加劲肋高度和间距的增大而减小。Taking the U-stiffened plate of steel box girder of south channel cable-stayed bridge of Hangzhou Bay Bridge as the research object, according to similarity theory, 9 testing models of U-stiffened plate with 1 ： 3 scale of steel box girder were made. The stability ultimate hearing capacity of stiffened plate was studied by ultimate bearing capacity experiment. The results show that there are three unstable failure modes under axial pressure, i.e. motherboard failure, the motherboard and stiffening rih joint failure and the stiffening rib failure. All failure modes have the similar regularity on displacement and strain. The ultimate bearing capacity of the model increases along with the increase of the thickness of the motherboard and the stiffening rib, and decreases along with the increase of the height of the stiffening rib and the distance between the stiffening ribs.

关 键 词：桥梁工程 斜拉桥 试验研究 极限承载力 加劲板 钢箱梁 

分 类 号：U448.213[建筑科学—桥梁与隧道工程]