CAJ | 학술논문

为了研究配置高强钢筋的UPC梁的预应力筋极限应力增量的影响因素，进行了9根UPC试验梁静载试验。试验结果表明，配置HRB500级非预应力钢筋的UPC梁的预应力筋极限应力增量随HRB500级非预应力筋配筋率的提高而降低；相对低强度等级的非预应力筋，HRB500级钢筋作为非预应力筋能提高UPC梁的预应力筋极限应力增量，且预应力筋为抛物线型布置的UPC梁的极限应力增量大于预应力筋直线型布置时的值；非预应力钢筋采用高等级钢筋时，按JGJ92-2004《无粘结预应力混凝土结构技术规程》给出的公式计算无粘结预应力筋极限应力增量值偏于安全。
위료연구배치고강강근적UPC량적예응력근겁한응력증량적영향인소，진행료9근UPC시험량정재시험。시험결과표명，배치HRB500급비예응력강근적UPC량적예응력근겁한응력증량수HRB500급비예응력근배근솔적제고이강저；상대저강도등급적비예응력근，HRB500급강근작위비예응력근능제고UPC량적예응력근겁한응력증량，차예응력근위포물선형포치적UPC량적겁한응력증량대우예응력근직선형포치시적치；비예응력강근채용고등급강근시，안JGJ92-2004《무점결예응력혼응토결구기술규정》급출적공식계산무점결예응력근겁한응력증량치편우안전。
In order to investigate the influence factor of ultimate stress increment of prestressed tendons of the UPC beams with high strength reinforced steels, 9 UPC beams are designed for the static load test. The research results show that ultimate stress increment of prestressed steel of UPC beams with HRB500 reinforced bars decreases with the increas-ing of the reinforcement ratio of HRB500 reinforced bars; Compared with low intensity grades of non-prestressed rein-forcement, HRB500 reinforced bars as a prestressed reinforcement can improve the ultimate stress increment of pre-stressed steel of UPC beams, and ultimate stress increment of prestressed steels arrangement as parabolic type of UPC beams is greater than that of the linear arrangement of prestressed reinforcement; ultimate stress increment of unbounded prestressed tendons should be safe according to the formula from the JGJ92-2004 "Technical specification for concrete structures prestressed with unbounded tendons".