CAJ | 학술논문

通过钢筋开槽内贴应变片的试验方法和有限元模拟两种手段，得到不同再生粗骨料取代率（30％、50％、100％）与不同锚固长度（180、360、450 mm）下的再生混凝土与钢筋之间的荷载-滑移曲线，研究粗骨料取代率和锚固长度的耦合作用对钢筋与再生混凝土间粘结性能的影响规律。结果表明，在相同锚固长度下，粗骨料取代率为100％的试件的粘结强度最大；在相同粗骨料取代率下，锚固长度为450 mm的粘结强度最大，分别比锚固长度为360 mm和180 mm的试件高出14.3％与25.7％；增加锚固长度可以降低加载端的应变值。另外，通过有限元分析软件ANSYS程序对粘结强度与荷载-滑移曲线进行模拟分析，证明模拟结果与试验结果吻合良好。
통과강근개조내첩응변편적시험방법화유한원모의량충수단，득도불동재생조골료취대솔（30％、50％、100％）여불동묘고장도（180、360、450 mm）하적재생혼응토여강근지간적하재-활이곡선，연구조골료취대솔화묘고장도적우합작용대강근여재생혼응토간점결성능적영향규률。결과표명，재상동묘고장도하，조골료취대솔위100％적시건적점결강도최대；재상동조골료취대솔하，묘고장도위450 mm적점결강도최대，분별비묘고장도위360 mm화180 mm적시건고출14.3％여25.7％；증가묘고장도가이강저가재단적응변치。령외，통과유한원분석연건ANSYS정서대점결강도여하재-활이곡선진행모의분석，증명모의결과여시험결과문합량호。
In order to study the impacts of recycled aggregate replacement rates and the anchorage length on the bond strength between the recycled aggregate concrete and rebar , the load-slip curves between recycled concrete with different recycled coarse aggregate replacement percentages ( 30%, 50%and 100%) and different anchorage length (180, 360, 450 mm) were recorded by means of a pull-out test in which strain gauges are pasted on rebar and a finite element simulation .The study showed that the bond strength was highest when the recycled coarse aggregate replacement percent -age was 100%under the same anchorage length;the bond strength of anchorage length of 450 mm was respectively 4.3%and 25.7% higher than that of 360 mm and 180 mm specimens under the same recycled coarse aggregate replacement percentage; the strain decreased gradually with the in-crease of the anchorage length at the loading end .Meanwhile , the finite element analysis by ANSYS confirms that the simulation results and testing tests are in good agreement .