冷轧带肋钢筋混凝土受弯构件疲劳性能研究
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摘要
为推广冷轧带肋钢筋在水泥混凝土路面中的应用,对配有不同配筋率的冷轧带肋钢筋混凝土简支标准梁进行了等幅疲劳荷载试验研究,针对不同的疲劳破坏形式,分析其产生的原因,提出了界限配筋率的概念,并推导了折断破坏与弯拉破坏之间和弯拉破坏与剪压破坏之间的界限配筋率。提出了考虑不同配筋率影响的、可供配筋混凝土路面设计参考的疲劳方程。通过研究发现:受弯构件适当配置冷轧带肋钢筋不仅具有良好的抗裂性能和延性,而且其疲劳寿命也有显著提高。
In order to popularize the using of cold-rolled deformed steel bar in concrete pavement,experiment of simply supported concrete standard beams loaded by equal amplitude fatigue loading was studied.Aimed at different fatigue failure types of beams,failure causes were analysed.A concept of critical reinforcement ratio was offered,and limit reinforced ratios between broken and bending-tensile failure and between bending-tensile and shear-compression failure were derived.The fatigue equation for design of reinforced concrete pavement was suggested.The beams of concrete reinforced by adequate cold-rolled deformed steel bar had well resisting-crack ability and ductility,and their fatigue lives enhanced eminently.A fatigue equation that affection of different reinforcement ratio had been considered was offered.
In order to popularize the using of cold-rolled deformed steel bar in concrete pavement,experiment of simply supported concrete standard beams loaded by equal amplitude fatigue loading was studied.Aimed at different fatigue failure types of beams,failure causes were analysed.A concept of critical reinforcement ratio was offered,and limit reinforced ratios between broken and bending-tensile failure and between bending-tensile and shear-compression failure were derived.The fatigue equation for design of reinforced concrete pavement was suggested.The beams of concrete reinforced by adequate cold-rolled deformed steel bar had well resisting-crack ability and ductility,and their fatigue lives enhanced eminently.A fatigue equation that affection of different reinforcement ratio had been considered was offered.
引文
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[19]欧进萍,林燕清.混凝土高周疲劳损伤的性能劣化试验研究[J].土木工程学报,1999,32(5):15-22.
[2]陈宝春,陈友杰,王来永,等.钢管混凝土偏心受压应力—应变关系模型研究[J].中国公路学报,2004,17(1):24-28.
[3]胡世德,苏虹,王君杰,等.钢管混凝土拱桥的三维弹塑性地震反应理论分析[J].中国公路学报,2004,17(1):57-61.
[4]李秀芬,吴佩刚,赵光仪.高强混凝土梁抗弯疲劳性能的试验研究[J].土木工程学报,1997,30(5):37-42.
[5]梅葵花,吕志涛.CFRP斜拉索的静力特性分析[J].中国公路学报,2004,17(2):43-45.
[6]增志斌,李志榕.普通混凝土梁用钢筋S-N曲线研究[J].土木工程学报,1999,32(5):10-14.
[7]王清湘,赵大洲,关萍.轴心受压钢骨—钢管混凝土组合短柱力学性能研究[J].中国公路学报,2004,17(3):36-40.
[8]WILLIAM G B,MARLEY M J,MOHAMMADI J,JIELSEN R J,SARKANI S.Fatigue ReassessmentApplications:State-of-the-Art Paper[J].Journal ofStructural Engineering,1997,123(3):277-285.
[9]韩林海,杨有福,游经团,等.圆钢管混凝土压弯构件滞回性能的试验研究与理论分析[J].中国公路学报,2004,17(3):51-56.
[10]TENG S,MA W,TAN K H,KONG F K.Shear Strengthof Concrete Deep Beams under Fatigue Loading[J].ACIStructural Journal,2000,97(4):572-580.
[11]狄谨,周绪红,刘永健.矩形钢管混凝土桁架节点极限承载力研究[J].中国公路学报,2004,17(3):62-67.
[12]武建民,李晓军.沥青混合料小梁疲劳试验的有限元模拟[J].长安大学学报:自然科学版,2004,24(1):5-8.
[13]谢峻,韩大建.钢筋混凝土简支T型梁桥损伤识别的数值模拟[J].中国公路学报,2004,17(4):45-49.
[14]尧国皇,韩林海.钢管混凝土轴压与纯弯荷载—变形关系曲线实用计算方法研究[J].中国公路学报,2004,17(4):50-54.
[15]季天剑,王辉,陈荣生.再生水泥混凝土疲劳性能[J].交通运输工程学报,2002,2(2):16-17.
[16]祝明桥,方志,胡秀兰,等.配筋钢纤维高强混凝土薄壁箱梁纯扭试验研究[J].中国公路学报,2005,18(3):43-47.
[17]钟铭,王海龙,王海良,等.高强混凝土梁在疲劳荷载作用下的裂缝宽度计算[J].中国公路学报,2005,18(4):48-53.
[18]黄承逵,赵国藩,彭骏.二级配钢纤维混凝土疲劳性能的研究[J].中国公路学报,1994,7(3):29-35.
[19]欧进萍,林燕清.混凝土高周疲劳损伤的性能劣化试验研究[J].土木工程学报,1999,32(5):15-22.
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