新型K型弯管锥头节点与传统管桁架节点的力学性能对比研究

新型K型弯管锥头节点在超大跨度结构中具有节约材料、便于施工等优势,为了使该节点能应用于工程实践中,本文将其与普通管桁架弯管节点、变截面管桁架弯管节点进行了对比研究.通过有限元计算软件ANSYS进行参数化分析,对比了三类节点的破坏模式、极限承载力、强屈比和延性系数.分析表明,K型弯管锥头节点的承载力明显优于其余两类节点,该节点也表现出与另外两类节点同样良好的强屈比与延性系数,可知该节点同样具有充足的安全储备和耗能性能.

Comparative Study on Mechanical Properties of A New Bend Circular Steel Tube Cone-Head K-joints and Traditional Tube Truss Joints

The New Bend Circular Steel Tube Cone-Head K-joints has a great many advantages in the large span structures, including material savings, facilitating construction and so on. In order to get the joint used in engineering practice, this thesis compares it with ordinary tube bending joint truss and non-uniform tube bending joint truss. With the Calculation software ANSYS parametric analysis, three aspects of the three types of joints are in comparison, consisting of failure modes through finite element analysis, ultimate bearing capacity, high yield ratio and ductility factor. The analysis shows that the capacity of bend circular steel tube cone-head K-joints is obviously better than the other two types of joints, which also shows the same advantages with the other two joints with good strength and ductility factor. Therefore, this joint also has properties of enough safety margin and energic performance.