CFRP筋预应力粗纤维混凝土梁抗震性能的试验研究
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摘要
基于碳纤维增强塑料筋(Carbonfiber reinforced plastic,CFRP)预应力粗纤维混凝土梁的低周反复加载试验,对其受力过程、破坏形态、滞回曲线、骨架曲线、延性、刚度退化、耗能能力等抗震性能进行较为深入的研究与分析。研究表明,预应力FRP(fiber reinforced plastic)筋能明显提高试件梁的承载力,中等预应力度的CFRP预应力粗纤维混凝土梁有较好的抗震性能和延性。并用ANSYS软件进行模拟分析,计算值与试验结果吻合良好。
Based on experiments of CFRP(Carbon fiber reinforced plastic)prestressed macro-fiber concrete beams under low reversed cyclic loading,failure pattern,hysteresis curves,ductility,rigidity degeneration,energy dissipation are studied systematically.Studies show prestressed FRP(fiber reinforced plastic) tendons can obviously improve the carrying capacity of concrete beams,and FRP prestressed macro-fiber concrete beams has better seismic performance and ductility.The simulation analysis of concrete beams based on ANSYS program is carried out,calculation results are in good agreement with those of the tests.
Based on experiments of CFRP(Carbon fiber reinforced plastic)prestressed macro-fiber concrete beams under low reversed cyclic loading,failure pattern,hysteresis curves,ductility,rigidity degeneration,energy dissipation are studied systematically.Studies show prestressed FRP(fiber reinforced plastic) tendons can obviously improve the carrying capacity of concrete beams,and FRP prestressed macro-fiber concrete beams has better seismic performance and ductility.The simulation analysis of concrete beams based on ANSYS program is carried out,calculation results are in good agreement with those of the tests.
引文
1Raafat El-hacha,Mamdouh Elbadry.Strengthening concrete beams with ex-ternally prestressed Carbonfiber composite cables.FifthInternational Confer-ence on Fiber-Reinforced Plastics for Reinforced Concrete,London,2001.699～708.
2Patrick X WZou.Flexural behavior and deformability of fiber reinforced polymer-restressed concrete beams.Journal of Composites for Construction,2003,7(4):275～284.
3薛伟辰,程斌,李杰.低周反复载荷下预应力高性能混凝土梁的抗震性能.地震工程与工程振动,2003,23(1):78～83.XUE WeiChen,CHENG Bin,LI Jie.Seismic performance of prestressed high performance beams under lowreversed cyclic loading.Earthquake Engi-neering and Engineering Vibration,2003,23(1):78～83(In Chinese).
4薛伟辰,程斌,李杰.预应力与非预应力高性能混凝土梁的抗震性能试验研究与有限元分析.建筑结构学报,2004,25(1):1～9.XUE WeiChen,CHENGBin,LI Jie.Experimental studies and FEManalysis of seismic behavior of prestressed and non-prestressed high performance con-crete beams.Journal of Building Strctures,2004,25(1):1～9(In Chi-nese).
5邓宗才.高性能合成纤维混凝土.北京:科学出版社,2003.DENG ZongCai.High performance synthetic fiber reinforced concrete.Bei-jing:Science Press,2003(In Chinese).
2Patrick X WZou.Flexural behavior and deformability of fiber reinforced polymer-restressed concrete beams.Journal of Composites for Construction,2003,7(4):275～284.
3薛伟辰,程斌,李杰.低周反复载荷下预应力高性能混凝土梁的抗震性能.地震工程与工程振动,2003,23(1):78～83.XUE WeiChen,CHENG Bin,LI Jie.Seismic performance of prestressed high performance beams under lowreversed cyclic loading.Earthquake Engi-neering and Engineering Vibration,2003,23(1):78～83(In Chinese).
4薛伟辰,程斌,李杰.预应力与非预应力高性能混凝土梁的抗震性能试验研究与有限元分析.建筑结构学报,2004,25(1):1～9.XUE WeiChen,CHENGBin,LI Jie.Experimental studies and FEManalysis of seismic behavior of prestressed and non-prestressed high performance con-crete beams.Journal of Building Strctures,2004,25(1):1～9(In Chi-nese).
5邓宗才.高性能合成纤维混凝土.北京:科学出版社,2003.DENG ZongCai.High performance synthetic fiber reinforced concrete.Bei-jing:Science Press,2003(In Chinese).
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