加劲拱肋对改善冷弯钢板桩局部屈曲性能的探究

Research about Stiffened Web to Improve Local Buckling of Cold-formed Steel Sheet Pile

冷弯薄壁型钢与热轧型钢相比,具有许多优越之处,正日益广泛地应用于工程结构之中.由于冷弯钢板桩具有薄板壁、大截面的形状,在向地面打桩等情况下受到轴向压力可能会导致局部的屈曲变形.因此,对冷弯钢板桩进行截面优化,提高屈曲强度很有必要.文中对现阶段采取加劲拱肋的方案进行分析,经过ANSYS软件进行有限元模拟,发现这一方案可以有效的改善结构受力,提高抗屈曲能力,说明加劲拱肋值得在钢板桩结构中进行推广.

Cold-formed thin-walled steel is used increasingly in a wide range of construction due to its many advantages compared with hot-rolled steel. Because of the shape of a thin wall and a large cross- section, the structure receives axial compression which may lead to local buckling when it is piled into the soil. Therefore, cross-section optimization of the cold-formed steel sheet pile to improve the buck- ling strength is necessary. For the plan of a stiffened web, through finite element simulation of ANSYS , it is found that this scheme can effectively improve the ability to resist buckling, it is worth- while to be promoted in the steel sheet pile structure.