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一、特点 钢管混凝土是将普通混凝土填入薄壁圆型钢管内而形成的组合结构。钢管混凝土可借助于内填混凝土增强钢管壁的稳定性;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(图1),从而使核心混凝土具有更高的抗压强度和抗变形能力。它与传统的钢筋混凝土柱相比,具有以下几个优点:①重量轻、塑性好、耐疲劳、强度高、耐冲击。②可以承受较大的剪力及弯矩,抗震性能好。③钢管作为劲性承重骨架,省去
I. Characteristics Steel-filled concrete is a composite structure formed by filling ordinary concrete into thin-walled round steel pipes. Concrete-filled steel tubes can be used to enhance the stability of steel tube walls by means of in-filled concrete; by virtue of the effect of steel tubes on the cir- culation (constraint) of the core concrete, the core concrete is placed under three-way compression (Fig. 1), thus making the core concrete higher Compressive strength and deformation resistance. Compared with traditional reinforced concrete columns, it has the following advantages: 1 Light weight, good plasticity, fatigue resistance, high strength and impact resistance. 2 can withstand greater shear and bending moments, good seismic performance. 3 steel pipe as a load-bearing skeleton, save