不同连接形式下共享铁塔挂载连接件性能研究

Study on Performance of Mounting Connector of Shared Tower in Different Connection Types

目的 研究不同连接方式下共享铁塔挂载连接件的力学性能,分析挂载连接件的承载能力、变形能力、破坏模式以及各部件之间的协同工作性能,给出各参数的取值范围,为工程实践提供参考。方法 以两种不同连接方式的挂载连接构件为试验对象进行静力试验,并使用ABAQUS有限元分析软件对试验进行模拟验证和参数分析,进一步研究挂载连接件节点板厚、螺栓个数、螺栓间距和螺栓直径对挂载连接件受力性能的影响。结果 在水平荷载下,两种不同连接方式的试件均未出现滑移;试件的破坏形态均呈现在方钢管加劲肋处或顶部端板处的断裂;试件KL-2的极限荷载略大于试件KL-1,初始刚度略小于试件KL-1。结论 同等条件下连接方式1与方式2连接性能差异较小,当双板件的厚度不小于12 mm、螺栓间距不小于60 mm、螺栓个数不少于6个、直径不小于20 mm时,若想进一步提高挂载连接件的承载能力,可从双板件之外的部件考虑。

The mechanical properties of the shared steel tower mounting connections under different connection types were studied in this paper, and the bearing capacity, deformation capacity, failure type and the synergistic performance between the components of the hanging connections were.To provide reference for the engineering practice, the ranges of the parameters were given.A static test in mounting connection members with two different connection types as test objects was conducted.Finally, a parameter analysis was carried out using ABAQUS,the effects of joint plate thickness, number of bolts, bolt spacing and bolt diameter on the mechanical properties of mounting were further demonstrated.Under horizontal load, no slip occurred in the with two different connection types.T he failure types of the specimens show the fracture at the stiffening rib of square steel tube or at the top end plate.The ultimate load of specimen KL-2 is slightly larger than that of specimen KL-1,and the initial stiffness is slightly lower than that of specimen KL-1.Under the same conditions, t he performance difference between connection type 1 and 2 is small.When the thickness of double plates is not less than 12 mm, the distance between bolts is not less than 60 mm, the number of bolts is not less than 6 and the diameter is not less than 20 mm, the load-bearing capacity of mounting connections can be further improved by considering components other than double plates.