单边连接高强角钢受压力学性能的试验研究

通过对48根Q460高强角钢单边连接压杆承载力试验,对其受力性能和变形进行研究。由试验可知:试件绕平行于连接板的轴线发生弯曲变形,同时伴有绕角钢纵轴的扭转变形,小长细比试件大多为局部屈曲,大长细比试件为整体屈曲。将试验极限荷载值与美国ASCE 10—1997《输电铁塔设计导则》理论值进行对比,结果表明,试验值略大于美国规范值,因此,可以用美国ASCE 10—1997对单边连接Q460高强等边角钢压杆进行设计,且设计偏于安全。

EXPERIMENTAL STUDY ON THE MECHANICAL PROPERTIES OF HIGH STRENGTH ANGLE STEEL ATTACHED BY ONE LEG

Experiment on bearing capacity of 48 Q460 high strength angle steel for compression members attached by one leg was carried out, the results of mechanical behavior and deformation for specimens were analyzed. The experiment result shows: the bending deflection of the angle occurred in a direction parallel to the connected leg, meanwhile, the twisting deformation occurred in a longitudinal direction of specimen. Most of small slenderness members were controlled by local buckling, and large members were controlled by overall buckling. Then compared with the experimental results and American Design ofLatticed Steel Transmission Structures ASCE 10-1997 results, the results show experiment results are slightly larger than American ASCE 10-1997 results. Therefore, Q460 high-strength equal angle steel compression members attached by one leg can be designed using ASCE 10-1997, and the design is in favor of a security.