CAJ | 학술논문

为了研究 CFRP 预应力混凝土棱柱体(carbon fiber reinforced plastics prestressed concrete prisms,简称CFRP-PCPs)复合筋嵌贴加固混凝土梁的抗裂性能,通过5根混凝土梁在单调荷载作用下的试验研究,对CFRP-PCPs 复合筋嵌贴加固钢筋混凝土梁的开裂性能进行分析,试验结果表明,CFRP-PCPs 复合筋嵌贴加固混凝土梁开裂荷载有所提高,裂缝高度和裂缝宽度均小于未加固梁的裂缝开展情况,且随着复合筋预应力的增加,有效的阻碍了加固梁裂缝的开展。通过分析,修正了 CFRP-PCPs 复合筋的弹性模量,提出了嵌贴CFRP-PCPs 复合筋加固混凝土梁开裂弯矩的计算方法,计算值与试验值之比的平均值为0.966,结果显示吻合较好。
위료연구 CFRP 예응력혼응토릉주체(carbon fiber reinforced plastics prestressed concrete prisms,간칭CFRP-PCPs)복합근감첩가고혼응토량적항렬성능,통과5근혼응토량재단조하재작용하적시험연구,대CFRP-PCPs 복합근감첩가고강근혼응토량적개렬성능진행분석,시험결과표명,CFRP-PCPs 복합근감첩가고혼응토량개렬하재유소제고,렬봉고도화렬봉관도균소우미가고량적렬봉개전정황,차수착복합근예응력적증가,유효적조애료가고량렬봉적개전。통과분석,수정료 CFRP-PCPs 복합근적탄성모량,제출료감첩CFRP-PCPs 복합근가고혼응토량개렬만구적계산방법,계산치여시험치지비적평균치위0.966,결과현시문합교호。
To study the anti-crack performance of concrete beam strengthened with near surface mounted carbon fiber reinforced plastics prestressed concrete prisms ( CFRP-PCPs), experimental studies on five concrete beams under monotonic loads were carried out, and the anti-crack perform-ance of concrete beam was analyzed. The results showed that the cracking load of reinforced concrete beam was improved; that the height and width of the crack are less than those of unreinforced beam;that the development of the crack in the reinforced beam had been effectively prevented with the in-crease of prestressing. Based on the analysis, the elastic modulus of CFRP-PCPs was modified, a numerical method for cracking moment of concrete beam strengthened with near surface mounted CFRP-PCPs was presented, and the average ratio of the calculated and experimental values was 0. 966. Comparisons show that the calculated values agree well with the experimental results.