方钢管混凝土柱的角部对核心混凝土的约束能力较强,钢管边中部对核心混凝土的约束较弱,为提高钢管边中部对核心混凝土的约束能力,在方钢管混凝土柱中配置螺旋箍筋来约束核心混凝土,从而提高方钢管混凝土柱的极限承载力和塑性变形的能力。 The confined capacity of the square concrete filled square steel tube columns to the core concrete is strong, and the central part of the steel tube side has a weak constraint on the core concrete. To enhance the restraint ability of the central part of the steel tube to the core concrete, spiral stirrups are arranged in the square steel tube concrete columns Constraint of core concrete, thereby enhancing the ultimate bearing capacity of square concrete filled steel columns and the ability of plastic deformation.