CAJ | 학술논문

为研究钢管复合桩的承载性能，进行了剪力环、泥皮和防腐涂层共同作用下的钢管复合桩和钢筋混凝土桩室内模型试验，对比分析了试件的荷载-变形曲线、钢管变形等参数，并采用分解分析法对钢管复合桩的套箍效应进行了分析．试验及计算结果表明，钢管复合桩承载性能较钢筋混凝土桩显著提高，套箍效应使得钢管复合桩承载力较空钢管和钢筋混凝土桩承载之和提高9．8％，混凝土抗剪强度提高了1．2倍；钢管对核心混凝土产生的紧箍作用沿界面长度增大，且随荷载的增加而增大；在防腐涂层、泥皮和剪力环（间距90 cm）共同作用下，钢管套箍效应带来的混凝土紧箍力最大值可达2．32 MPa；规范ACI （2005）适合于泥皮、防腐涂层和剪力环共同作用时钢管复合桩极限承载力的计算．
위연구강관복합장적승재성능，진행료전력배、니피화방부도층공동작용하적강관복합장화강근혼응토장실내모형시험，대비분석료시건적하재-변형곡선、강관변형등삼수，병채용분해분석법대강관복합장적투고효응진행료분석．시험급계산결과표명，강관복합장승재성능교강근혼응토장현저제고，투고효응사득강관복합장승재력교공강관화강근혼응토장승재지화제고9．8％，혼응토항전강도제고료1．2배；강관대핵심혼응토산생적긴고작용연계면장도증대，차수하재적증가이증대；재방부도층、니피화전력배（간거90 cm）공동작용하，강관투고효응대래적혼응토긴고력최대치가체2．32 MPa；규범ACI （2005）괄합우니피、방부도층화전력배공동작용시강관복합장겁한승재력적계산．
In order to investigate the bearing capacity of steel tubular composite (STC )piles,two groups of piles,including a group of STC piles with shear ring,drilling mud skin and anticorrosion coating and a group of reinforced concrete piles,were used to conduct comparative model tests. The load-deformation curves and steel tube deformations of specimens in the two groups were compared, and the confinement effect of STC piles was analyzed by decomposition analysis method. The test and calculation results show that the bearing capacity of the STC pile was larger than that of the reinforced concrete pile significantly. Due to the confinement effect,the bearing capacity of the STC pile was increased by 9 . 8%even compared with the sum of the bearing capacity of a hollow steel tube and a reinforced concrete pile;at the same time,the shear strength of the core concrete was increased by 1. 2 times. The confining stress of the STC pile increases with load and pile depth. The maximum confining stress of the STC pile with anticorrosion coating,drilling mud skin,and shear ring could reach 2. 32 MPa. In addition,the specification ACI (2005 )could apply to the ultimate bearing capacity calculation of STC piles with anticorrosion coating,drilling mud skin,and shear ring,in a way to calculate the internal strength.