CAJ | 학술논문

为得到钢纤维增强活性粉末混凝土( RPC)的受拉应力—应变曲线，采用自行设计的试验装置，完成了不同钢纤维体积掺量( Vf )时活性粉末混凝土的轴向拉伸试验，测出了Vf=1%、2%的活性粉末混凝土受拉应力—应变全曲线。试验结果表明，钢纤维增强RPC的受拉应力—应变全曲线分为上升段、峰值后应力骤降段、应力稳定段和下降段；随钢纤维掺量的增加，钢纤维增强RPC的抗拉强度、峰值应变、弹性模量增大，受拉破坏形式从脆性转变为延性。 RPC的受拉峰值应变与其他混凝土相比无明显提高，其裂后延性优势应结合配筋形式发挥。
위득도강섬유증강활성분말혼응토( RPC)적수랍응력—응변곡선，채용자행설계적시험장치，완성료불동강섬유체적참량( Vf )시활성분말혼응토적축향랍신시험，측출료Vf=1%、2%적활성분말혼응토수랍응력—응변전곡선。시험결과표명，강섬유증강RPC적수랍응력—응변전곡선분위상승단、봉치후응력취강단、응력은정단화하강단；수강섬유참량적증가，강섬유증강RPC적항랍강도、봉치응변、탄성모량증대，수랍파배형식종취성전변위연성。 RPC적수랍봉치응변여기타혼응토상비무명현제고，기렬후연성우세응결합배근형식발휘。
In order to obtain the tensile stress-strain curve of steel fiber reinforced reactive powder concrete ( RPC) , axial tensile tests on reactive powder concrete were completed using a self-de-signed equipment. The complete tensile stress-strain curve of RPC with different volume fraction of steel fiber ( Vf=1%, 2%) were obtained through the test. The results indicate that the tensile stress-strain curve of RPC strengthened with steel fiber is composed of an upward section, a rapid drawdown section after the peak stress, a stable section and a downward section. With the increase of volume fraction of steel fiber, the tensile strength, the peak strain and the modulus of elasticity of the steel fiber reinforced RPC enlarge, and the tensile failure mode turns from brittleness to ductili-ty. Compared with other types of concretes, RPC has a tensile peek strain which is not obviously higher. The ductility of RPC should be applied with steel bars.