钢纤维高强钢筋混凝土梁剪切韧性试验研究
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摘要
通过6根钢纤维高强钢筋高强混凝土梁及2根对比梁的斜截面受剪试验,研究钢纤维掺量和混凝土强度对高强钢筋混凝土梁剪切性能的影响。结合弯曲韧度指数确定方法和梁受剪破坏特点,以梁受剪试验荷载挠度曲线为基础,提出改进多特征点法计算剪切韧性指标,定量分析钢纤维掺量及混凝土强度对剪切韧性的影响。结果表明,改进多特征点法能够客观、全面地表达梁的剪切韧性。
The shear capacity tests for six steel fiber high-strength reinforced concrete beams and two beams without steel fiber are taken to research the influences of the steel fiber contents and concrete strength on shear performance of the high-strength reinforced concrete beams.Based on the load-deflection curves of the beams,considering the determination method of bend toughness indexes and the beams failure features,the modified multi-feature points theory is put forward to calculate the shear toughness indexes and analyse the influences of the steel fiber content and concrete strength to shear toughness quantitatively.The results show the multi-feature points theory can express the shear toughness of the beams objectively and comprehensively.
The shear capacity tests for six steel fiber high-strength reinforced concrete beams and two beams without steel fiber are taken to research the influences of the steel fiber contents and concrete strength on shear performance of the high-strength reinforced concrete beams.Based on the load-deflection curves of the beams,considering the determination method of bend toughness indexes and the beams failure features,the modified multi-feature points theory is put forward to calculate the shear toughness indexes and analyse the influences of the steel fiber content and concrete strength to shear toughness quantitatively.The results show the multi-feature points theory can express the shear toughness of the beams objectively and comprehensively.
引文
[1]杜修力,袁健,周宏宇.钢筋混凝土梁在低周反复荷载作用下受剪性能的尺寸效应试验研究[J].地震工程与工程振动,2011,31(5):30-38.
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[6]张宏战,黄承逵.钢筋钢纤维高强混凝土箍筋梁剪切延性分析[J].大连理工大学学报,2005,45(3):422-426.
[7]林小松,杨果林.钢纤维高强与超高强混凝土[M].北京:科学出版社,2002.
[8]丁一宁,刘思国.钢纤维自密实混凝土弯曲韧性和剪切韧性试验研究[J].土木工程学报,2010,43(11):55-63.
[9]姚大立,贾金青,余芳.预应力超高强混凝土梁剪切延性分析[J].哈尔滨工程大学学报,2013,34(5):1-6.
[10]李克杰,陶清林.型钢混凝土柱骨架曲线特征点计算方法研究[J].安徽工业大学学报:自然科学版,2013,30(1):71-77.
[2]张宏战.钢纤维高强混凝土构件受剪性能试验研究[D].大连:大连理工大学,2005.
[3]姜鹏.钢筋钢纤维高强混凝土梁斜截面受力性能试验研究[D].郑州:郑州大学,2005.
[4]中国工程建设标准化协会标准.CECS13-1989钢纤维混凝土试验方法[S].北京:中国计划出版社,1996.
[5]张宏战,黄承逵.钢筋钢纤维高强混凝土箍筋梁的剪切变形与延性研究[J].混凝土,2003(11):27-30.
[6]张宏战,黄承逵.钢筋钢纤维高强混凝土箍筋梁剪切延性分析[J].大连理工大学学报,2005,45(3):422-426.
[7]林小松,杨果林.钢纤维高强与超高强混凝土[M].北京:科学出版社,2002.
[8]丁一宁,刘思国.钢纤维自密实混凝土弯曲韧性和剪切韧性试验研究[J].土木工程学报,2010,43(11):55-63.
[9]姚大立,贾金青,余芳.预应力超高强混凝土梁剪切延性分析[J].哈尔滨工程大学学报,2013,34(5):1-6.
[10]李克杰,陶清林.型钢混凝土柱骨架曲线特征点计算方法研究[J].安徽工业大学学报:自然科学版,2013,30(1):71-77.
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