CAJ | 학술논문

为了研究冻融循环作用对钢筋混凝土柱偏心受压性能的影响，对经历0，75，100，125，150次冻融循环作用后的立方体试块进行了抗压强度试验，并设计制作了30根钢筋混凝土柱，将其经历0，75，100，125，150次冻融循环作用后进行偏心受压静力试验。分析了混凝土相对抗压强度、质量损失率、相对动弹性模量与冻融循环次数的关系，研究了冻融循环次数、轴向力偏心距对钢筋混凝土柱偏心受压性能的影响。研究结果表明，随着冻融循环次数的增加，试验柱的开裂荷载和极限荷载都逐渐减小，极限变形逐渐增大，部分试件由大偏心受压破坏转变为小偏心受压破坏。现行混凝土结构设计规范关于钢筋混凝土偏心受压柱极限承载力的计算理论适用于冻融循环作用后的钢筋混凝土柱。
위료연구동융순배작용대강근혼응토주편심수압성능적영향，대경력0，75，100，125，150차동융순배작용후적립방체시괴진행료항압강도시험，병설계제작료30근강근혼응토주，장기경력0，75，100，125，150차동융순배작용후진행편심수압정력시험。분석료혼응토상대항압강도、질량손실솔、상대동탄성모량여동융순배차수적관계，연구료동융순배차수、축향력편심거대강근혼응토주편심수압성능적영향。연구결과표명，수착동융순배차수적증가，시험주적개렬하재화겁한하재도축점감소，겁한변형축점증대，부분시건유대편심수압파배전변위소편심수압파배。현행혼응토결구설계규범관우강근혼응토편심수압주겁한승재력적계산이론괄용우동융순배작용후적강근혼응토주。
To investigate the eccentric compressive behaviors of reinforced concrete (RC)columns after freeze-thaw cycles,compressive strength tests of concrete cubes after 0,75,100,125,150 freeze-thaw cycles were carried out.Then,30 RC columns were fabricated,and the corresponding static eccentric compressive experiments after 0,75,100,125,150 freeze-thaw cycles were carried out.The relationships between the relative compressive strength of concrete,mass loss rate,relative dynamic elastic modulus and the number of freeze-thaw cycles were analyzed,respectively.The in-fluences of the number of freeze-thaw cycles and the eccentric distance of axial force on the compres-sive behaviors of RC columns were studied.The results show that with the increase of the number of freeze-thaw cycles,both the cracking load and the ultimate load of RC columns decrease while the deflection increases gradually.Moreover,large eccentric compression failures of some specimens turn into small eccentric compression failure.The current concrete structure design code about the ul-timate load is still suitable for RC columns after freeze-thaw cycles.