Research On Mechanical Properties Of The Q460 High-strength Angle Struts Eccentricity At Both Ends

In recent years,along with our country economy development,electric power industry keep high speed development,transmission line to high voltage, large capacity,multi-loop and compact development.In order to enable the design of power transmission tower economic rationality,to use the high strength steel has became a reasonable choice.This paper main union the test on struts eccentricity at both ends,has confirmed the validity of finite element analysis,has carded out the parametric analysis.For the study of angle Q460 high-strength mechanical properties,so the 48 Q460 high-strength angle struts eccentricity at both ends have been tested,and test results are analyzed.For the better understanding the mechanical properties of Q460 high-strength angle,this article make use of large-scale general-purpose finite element program ANSYS to struts eccentricity at both ends analyzed.The results of the analysis carried out finite element analysis of variable parameters. In the analysis took into account the geometric nonlinearity,material nonlinearity and state nonlinearity.Finite element analysis taking into account the slenderness ratio of angle,width-to-thickness ratio of angle,connecting plate length,connecting plate thickness,bolt diameter,the number of bolts,pretension force of bolt's the impact on the ultimate bearing capacity,and have analyzed initial out-of-straightness the actual size and initial out-of-straightness's the impact on the ultimate beating capacity.Study shows that:when the struts for the small slenderness ratio,the destruction of the form of local buckling;when the struts for the large slenderness ratio,the destruction of the form of the overall buckling with mild rotation,the overall deformation of struts for around limbs parallel to the x-axis connecting the bending deformation.The changes of width-to-thickness ratio in the ultimate bearing capacity of the struts has a significant influence,for the same wide angle limb,regardless of whether the change in slenderness ratio, with the width-to-thickness ratio lower than its ultimate bearing capacity has increased significantly.Changes thickness of connecting plate to the ultimate bearing capacity of the struts have a certain influence,slenderness ratio in the small term,the impact is small,in the large slenderness ratio,the impact is greater.The actual size of struts to its ultimate bearing capacity also have a certain influence;other factors on the struts the impact of the ultimate bearing capacity can be neglected.