桥梁建设
橋樑建設
교량건설
BRIDGE CONSTRUCTION
2009年
z2期
97-100
,共4页
混杂纤维%高性能混凝土%开裂弯矩%抗裂度%试验%有限元分析%桥梁加固
混雜纖維%高性能混凝土%開裂彎矩%抗裂度%試驗%有限元分析%橋樑加固
혼잡섬유%고성능혼응토%개렬만구%항렬도%시험%유한원분석%교량가고
hybrid fibers%high-performance concrete%cracking moment%cracking resistance degree%test%finite element analysis%bridge strengthening
对16根混凝土梁进行抗裂试验研究和数值模拟,分析其开裂弯矩与纤维体积掺量的关系,并将试验结果与有限元分析结果进行对比.结果表明,适量加入钢-聚丙烯混杂纤维,可提高混凝土梁正截面开裂弯矩,并且随着钢纤维体积率的增加呈增长趋势,当聚丙烯纤维体积率固定为0.055%、0.11%、0.165%,钢纤维体积率达到最高1%时,其抗裂弯矩分别比普通高性能混凝土梁提高了26%、42.9%、26%,同时,影响其抗裂度大小的主要因素为钢纤维的体积掺量.
對16根混凝土樑進行抗裂試驗研究和數值模擬,分析其開裂彎矩與纖維體積摻量的關繫,併將試驗結果與有限元分析結果進行對比.結果錶明,適量加入鋼-聚丙烯混雜纖維,可提高混凝土樑正截麵開裂彎矩,併且隨著鋼纖維體積率的增加呈增長趨勢,噹聚丙烯纖維體積率固定為0.055%、0.11%、0.165%,鋼纖維體積率達到最高1%時,其抗裂彎矩分彆比普通高性能混凝土樑提高瞭26%、42.9%、26%,同時,影響其抗裂度大小的主要因素為鋼纖維的體積摻量.
대16근혼응토량진행항렬시험연구화수치모의,분석기개렬만구여섬유체적참량적관계,병장시험결과여유한원분석결과진행대비.결과표명,괄량가입강-취병희혼잡섬유,가제고혼응토량정절면개렬만구,병차수착강섬유체적솔적증가정증장추세,당취병희섬유체적솔고정위0.055%、0.11%、0.165%,강섬유체적솔체도최고1%시,기항렬만구분별비보통고성능혼응토량제고료26%、42.9%、26%,동시,영향기항렬도대소적주요인소위강섬유적체적참량.
The test study and numerical simulation were made for the cracking resistance of 16 hybrid fiber high performance concrete beams, the relationship between the cracking moment and the volume adding amount of the fibers of the beams were analyzed and the results of the test study were compared to those of the finite element analysis. The results show that the appropriate adding of the steel and polypropylene hybrid fibers to the beams can improve the cracking moment of the normal sections of the beams and the improvement tends to increase with the increase of the volume percentage of the steel fiber. When the volume percentage of the polypropylene fiber is fixed as 0. 055% , 0.11% and 0.165% and the volume percentage of the steel fiber reaches the maximum of 1 % , the cracking moment of the beams are respectively improved 26%, 42. 9% and 26% in comparison to that of the common high performance concrete beams. In addition, the principal factor having influence on the degrees of the cracking resistance of the beams is the volume adding amount of the steel fiber.
