输电铁塔曲“K节点”地震响应

Seismic response of ‘K node' on transmission tower crane arm

为研究输电铁塔曲臂"K节点"在地震作用下的响应,通过采用三角级数叠加法,数值模拟典型地震烈度下各场地地震加速度时程;将各地震烈度和场地组合下的地震加速度数值导入ANSYS中,进行了输电铁塔曲臂"K节点"地震响应分析。结果表明:在地震作用上,输电铁塔曲臂"K节点"产生了一定的位移,有限的位移没有影响杆件的极限承载力;杆件最大应力并不在"K节点"杆件处,应力值也并没有超过材料屈服极限。

This paper presents an investigation of the ‘K node’response of transmission tower crane arm under seismic loading, by using trigonometric series superposition method The typical time history seismic intensity at each site seismic acceleration was input into the numerical model.The obtained acceleration values for each earthquake seismic intensity and site combinations were imported into ANSYS to conduct the seismic analysis.The results show that a certain amount of displacement is generated on ‘K node’,while the limited displacement of the rod does not affect the ultimate bearing capacity In addition,the maximum stress does not occur on ‘K node’,and it is also does not exceed the allowable value of the material.