小角度斜交杆件连接节点承载力研究

RESEARCH ON BEARING CAPACITY OF THE JOINT CONNECTED BY OBLIQUE CROSSING MEMBERS WITH SMALL ANGLE

对小角度斜交杆件节点连接做法提出一种新的连接构造方式,并对该连接方式的传力机理及其改进形式进行研究。利用有限元方法对小角度斜交杆件节点连接的4种方式进行了系统的研究,得到理想杆4种连接方式在轴心受拉时的极限承载力以及在轴心受压作用下的屈曲临界荷载,同时对非理想杆在受压时的屈曲荷载进行了计算。对4种连接方式的受力性能进行了分析和比较,并建议使用按所提出的改进型节点连接方式进行节点设计。另外针对小角度斜交杆件连接节点的设计也给出了一些建议。

A new connection method about oblique crossing members with small angle was proposed. And the loadtransferring mechanism and modified form of the connected joint was introduced. Using the finite element method,the four forms of connection of oblique crossing members with small angle were studied systematically. The ultimate bearing capacity of the joints connected by the idea members in the above 4 ways under the axial tensile force was obtained,as well as the critical buckling load under axial compressive action. The buckling load of the imperfect members under compression was also calculated. The mechanical properties of the four kinds of connection were analyzed. And it recommended for using a modified form by the proposed connection method in design. The paper also provided a number of other design proposals.