中文摘要：

以江东大桥为背景,对自锚式悬索桥索梁锚固区借助通用有限元软件建立锚固区的精细板壳模型,研究锚固区各板件在最不利荷载组合作用下的受力特性,根据各板件的应力应变关系模型,分析锚箱结构的极限承载能力。计算结果表明：钢锚箱应力沿着传力路径由锚固位置向加劲梁方向逐渐减小。在最不利荷载组合作用下,Mises应力最大值为144MPa出现在铸造块背面加劲板上。对于锚箱结构,其最终的承载破坏形式是由于板件过大的变形导致了结构局部或全局丧失了稳定而退出工作,此时其主要受力板件尚未达到极限强度。锚箱的极限承载能力为设计荷载的7.4倍,锚箱具有足够的安全储备。

英文摘要：

In design of the Jiangdong Bridge,by using the fine shell element model,a Finite Element study is carried out to investigate the behavior of joints of girder to cables for this self-anchored suspension bridge under the most adverse load combinations,and the bearing capacity of these anchored joints are analyzed in accordance with the stress and strain relationships inherent in each individual panel component.The FE results illustrate that stress in the steel anchored box decreases along the load transverse path as the distance to the stiffened girder decreases.In the most adverse load combinations,the maximum Mises stress of 144 MPa will develop in the stiffeners back to the cast steel block.The ultimate failure of the anchored joint box occurs when the extra amount of deformation develops in the steel panels,hence leading to localized panel buckling or full panel buckling in the joint,while the main steel components are still unyielding.Value of the ultimate bearing capacity is verified as 7.4 times of that in the design load,and the anchored joints of girders to cables possess substantial strength reservation.