学术论文

      单角钢轴压承载力试验对比及理论分析

      Experiemental and analytical research on axial bearing capacity of single steel angles

      摘要:
      国外线路工程按照ASCE 10-97设计,EPRI及SERC铁塔测试中心发现用该规范设计的铁塔失效概率为23%;而按照国标杆塔规范设计的输电塔经济指标过高.因此,有必要开展单角钢的轴压承载力试验,进一步提出合理的单角钢承载力设计方法.本文选取18根单角钢进行轴压承载力试验及有限元分析,考虑所用刀铰装置的有效计算长度系数,确定单角钢的轴压稳定承载力.随后,提出一个综合考虑长细比和宽厚比的轴压稳定承载力计算公式,并验证了其适用性,为国外线路工程杆塔设计提供可靠的依据.
      Abstract:
      Foreign transmission line project reported that the failure rate of tower which designed by ASCE 10-97 was 23% in the EPRI and SERC,in the meantime,prototype tower in accordance with DL/T 5154 may often be too expensive.Therefore,it is necessary to carry out the axial bearing capacity test of single steel angle and a new rational calculation equation for designing of steel angles.Axial bearing capacity tests and FEM simulations of single angles were carried out in this paper,considering the effective length factor of the knife hinge adopted here,it revealed the true axial bearing capacity of single angle.Subsequently,this paper proposed a comprehensive design practice for bearing capacity of axial compressed single angle with slenderness ratio and width to thickness ratio,and the suitability of the proposed calculation method was validated.The proposed method can be used for foreign transmission line engineering design for its simplicity.
      作者: 曹世山 [1] 张大长 [1] 高正平 [2]
      Author: CAO Shishan [1] ZHANG Dachang [1] GAO Zhenping [2]
      作者单位: 南京工业大学 土木工程学院,塔桅结构工程研究中心,江苏南京211800 江苏省电力公司经济技术研究院,江苏南京,210005
      年,卷(期): 2017, 39(3)
      分类号: TU392.3
      在线出版日期: 2017年7月3日
      基金项目: 江苏省科技厅前瞻性联合研究项目