CAJ | 학술논문

对6根铝合金配筋新型混凝土梁试件进行了单调静载试验，研究该类新型混凝土梁的破坏机理，分析铝合金配筋混凝土梁的破坏过程、荷载‐跨中挠度曲线以及纵筋应变和弯曲裂缝等的变化规律。研究结果表明：铝合金配筋新型混凝土梁发生弯曲破坏和粘结破坏2种典型模式，其中受弯破坏模式表现为铝合金纵筋拉断失效或受压区混凝土压溃失效，粘结破坏模式主要由“拱机理”导致，表现为试件在支座处锚固破坏或斜截面混凝土剪压破坏；该类新型混凝土梁的极限荷载和名义屈服荷载非常接近，二者之比均小于1．15；发生弯曲破坏的铝合金配筋混凝土梁试件的荷载‐跨中挠度曲线可分为弹性阶段、带裂缝工作阶段和破坏失效阶段。
대6근려합금배근신형혼응토량시건진행료단조정재시험，연구해류신형혼응토량적파배궤리，분석려합금배근혼응토량적파배과정、하재‐과중뇨도곡선이급종근응변화만곡렬봉등적변화규률。연구결과표명：려합금배근신형혼응토량발생만곡파배화점결파배2충전형모식，기중수만파배모식표현위려합금종근랍단실효혹수압구혼응토압궤실효，점결파배모식주요유“공궤리”도치，표현위시건재지좌처묘고파배혹사절면혼응토전압파배；해류신형혼응토량적겁한하재화명의굴복하재비상접근，이자지비균소우1．15；발생만곡파배적려합금배근혼응토량시건적하재‐과중뇨도곡선가분위탄성계단、대렬봉공작계단화파배실효계단。
According to the experiment investigation on six new type concrete beams reinforced with aluminum alloy bars under monotonic static loading , the failure mechanism of new type concrete beams was researched .The failure process ,load‐deflection curve ,longitudinal strain distribution and flexural crack development were analyzed .The study results indicate that there are two typical failure patterns of new type concrete beams reinforced with aluminum alloy bars :flexural failure and bond failure .The flexural failure pattern always occurs with tensile rupture of aluminum alloy bars or crushing failure of concrete .Owing to the“arch action” ,the bond failure pattern always occurs with anchor failure of aluminum alloy bars at the supports or shear‐compression failure of concrete in shear‐compression zone .Moreover ,the ultimate load is quite near with the nominal yielding load of new type concrete beams reinforced with aluminum alloy bars ,the average ratio between the ultimate loads and the nominal yielding loads is less than 1 .15 .In addition ,the load‐deflection curves of flexural failure specimen can be divided into three stages:elastic stage ,crack stage and failure stage .