英文翻译
08级土木4班 王贤顺 20080420426
Because of the excellent mechanical performance and perfect shape,tubularstructures are widely used in space-shells and towers.The research on tube-joints is aninteresting topic internationally for the joints’shape diversity and complexity on loadproperties.At present,there has been full of study on X-type tubular joints’staticperformance under axial preure,however,there has been few research on guet plateto CHS X-joint and also little study on bending stiffne of X-type tubular joints.In thisthesis,the finite element method(FEM)is applied to investigate the static performanceof X-type tube-joints.The research includes:
(1)Ultimate strength of guet plate to CHS X-joints with the branch tubes underaxial preure.The mechanical performance and failure mode are analyzed by the FEMwith the parameters varying.The influence of geometric parameters and axial stre inchord on the ultimate strength are studied.
(2)Ultimate strength of guet plate to CHS XX-joints with the branch tubes underaxial preure.In addition to studying the effect of geometric parameters and axial strein chord on the ultimate strength,it also explores the influence of load properties andgeometric properties with different web loading proportion and angle between guets.
(3)The influence of geometric parameters on the in-plane and out-plane bendingstiffne of X-type tubular joints is considered.
(4)The effects of geometric parameters,axial stre in chord and load properties ofweb on the in-plane and out-plane bending performance and ultimate capacity of X-typetubular joints.
钢管结构因其良好的受力性能、美观简洁的造型，常被用于空间网壳以及塔架等结构中。钢管节点因为其形式变化多样，受力复杂，因此一直是国内外研究热点。目前对X型相贯节点在支管受轴力作用下的静力性能研究已较充分，而对于X型钢管-板连接节点受力性能以及相贯节点抗弯刚度的研究还较少。本文应用有限元方法对X型钢管节点静力性能进行研究，内容包括：
（1）X型钢管-板连接节点在支管受轴向荷载作用下的承载力。通过变参数分析考察了节点受力性能和破坏模式，研究了几何参数和主管应力比对节点受力性能和极限承载力的影响规律。
（2）XX型钢管-板连接节点在支管受轴向荷载作用下的承载力。除了研究了几何参数和主管应力比等因素对承载力影响，还着重考察了支管的加载比例、两平面节点板之间夹角对节点受荷及几何空间效应的影响。
（3）几何参数对X型相贯节点平面内、外抗弯刚度的影响。
（4）几何参数、主管应力比和支管拉压状况对X型相贯节点平面内、外受弯性能以及承载力的影响。
