薄壁钢管矿渣混凝土短柱的轴压性能试验研究

通过12根内置大尺度矿渣的薄壁钢管矿渣混凝土短柱的轴压试验,以核心混凝土强度、截面含钢率、矿渣块体取代率为变化参数,分析了新型短柱的破坏模式、荷载-位移关系,同时探讨了三种因素对新型短柱轴压承载力的影响程度.结果表明:全部试件均发生了剪切破坏,且试件都具有较高的轴压承载力和后期变形的能力;核心矿渣混凝土强度等级对新型短柱轴压承载力的影响程度最大,其次是含钢率,影响能力最小的是矿渣块体取代率.研究成果说明薄壁钢管矿渣混凝土短柱在承载力、延性方面有较多的优越性,有进一步研究和推广应用的价值.

Axial Behavior Experimental Study on Thin-walled Steel Stub Columns Filled with Slag Concrete

Considering the core slag concrete strength,steel ratio,substitution rateof slaglump as experimental parameter,through the axial test on 12 thin-walled steel stub columns filled with slag concrete and large-scale slag the context analyzed the collapse mode and mechanism,axial load-displacement relationship of the new short columns,also discussed the impact of axial bearing capacity of three factors of the new short column.The result shows that all specimens have occurredshear destruction,and specimens have high axial compressive bearing capacity and the ability to resist deformation;The influence of the core slag concrete strength grade on the axial compression bearing capacity of the new short columns is the largest,followed by the steel ratio,and the least influence is substitution rateof slaglump.Research results indicate that thin-walled steel stub columns filled with slag and large-scale slag have more advantages in capacity,ductility,it is worthy of further research and extension applications.