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随着输电线路荷载的增大,单肢角钢无法满足铁塔结构的强度要求,主材根部通常采用双拼或者四拼组合构件,但上部构件的内力相对较小,采用双拼或者四拼角钢时利用率较低,一般采用单肢角钢来达到节约材料的目的,因此,研究单角钢和双角钢的过渡节点具有重要意义。利用ANSYS软件建立单、双角钢过渡节点有限元模型,分析长细比、靴板厚度以及过渡节点板厚度等因素对其破坏模式、轴压承载力性能的影响规律。研究结果表明:随着长细比的增大,过渡节点的承载力降低;靴板的厚度与过渡节点承载力呈正比,当过渡节点板较薄时,节点发生弯曲失稳破坏,当厚度增加时,节点发生弯扭失稳破坏。
With the increase of transmission line load, the single-angle steel can not meet the strength requirements of the tower structure. The main timber usually adopts double-splicing or four-splicing components, but the internal components of the upper component are relatively small. When using double-splicing or splicing angle steel The utilization rate is low, and single limbs are usually used to save materials. Therefore, it is of great significance to study the transition joints of single angle and double angle. ANSYS software was used to establish the finite element model of single and double angle transition joints. The influence of slenderness ratio, shoe thickness and the thickness of transition plate on the failure mode and axial compressive load capacity was analyzed. The results show that as the slenderness ratio increases, the bearing capacity of the transition joints decreases. The thickness of the boot plate is directly proportional to the bearing capacity of the transition joints. When the transition joints are thinner, the joints buckled and buckled. When the thickness increases When the node bending and buckling instability damage.