钢管混凝土是由混凝土壤入薄壁圆形钢管内而形成的阻合结构材料。其基本原理有二:(1)借助内填混凝土增强钢管壁的稳定性;(2)借助钢管对核心混凝土的套箍(约束)作用,使核心混凝土处于三向受压状态,从而使核心混凝土具有更高的抗压强度和压缩变形能力。钢管混凝土除具 Steel-concrete-filled concrete is a structural material that is formed by the infiltration of concrete into a thin-walled circular steel tube. The basic principles are as follows: (1) Reinforce the stability of the steel pipe wall with the help of the infill concrete; (2) Apply the effect of the pipe to the ferrule (constraint) of the core concrete, so that the core concrete is in the three-direction compression state, thus making the core concrete Has higher compressive strength and compressive deformation. Concrete filled steel tube