纤维增强塑料筋与珊瑚混凝土粘结滑移本构模型
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摘要
鉴于FRP筋与钢筋之间、珊瑚混凝土与普通混凝土之间的物理力学特性差别,现有的钢筋-混凝土粘结滑移理论无法准确描述FRP筋-珊瑚混凝土间的粘结滑移行为。在已有研究成果和试验的基础上,建立了适用于FRP筋与珊瑚混凝土粘结滑移本构模型,并求解基于该模型上升段的粘结-滑移微分方程解答,利用该模型推导出FRP筋在珊瑚混凝土构件中的最小锚固长度的理论公式,并引入珊瑚混凝土修正系数。结果表明:该模型测算结果与试验数据吻合良好,研究成果为FRP筋与珊瑚混凝土的粘结理论研究提供了有益的参考。
The bonding property between FRP bars and coral concrete is the basis for their cooperative work. However, there are plenty of relative experimental studies,but less theoretical researches. In view of the difference of physical and mechanical properties between FRP bars and steel bars, and between coral concrete and ordinary concrete, the existing bond-slip theory of reinforced concrete cannot accurately describe the bond-slip behavior between FRP bars and coral concrete. On the basis of experimental data and existing research, this study established a bond-slip constitutive model for FRP bars and coral concrete. Then we solved the bond-slip differential equation solution based on the model. Finally, the theoretical formula of the minimum embedment length of FRP bars in coral concrete is derived from the model. The results show that this constitutive model is in good agreement with the experimental data, and the calculated value of embedment length is close to the standard. The research results provide a useful theoretical basis for the study of bond between FRP bars and coral concrete.
The bonding property between FRP bars and coral concrete is the basis for their cooperative work. However, there are plenty of relative experimental studies,but less theoretical researches. In view of the difference of physical and mechanical properties between FRP bars and steel bars, and between coral concrete and ordinary concrete, the existing bond-slip theory of reinforced concrete cannot accurately describe the bond-slip behavior between FRP bars and coral concrete. On the basis of experimental data and existing research, this study established a bond-slip constitutive model for FRP bars and coral concrete. Then we solved the bond-slip differential equation solution based on the model. Finally, the theoretical formula of the minimum embedment length of FRP bars in coral concrete is derived from the model. The results show that this constitutive model is in good agreement with the experimental data, and the calculated value of embedment length is close to the standard. The research results provide a useful theoretical basis for the study of bond between FRP bars and coral concrete.
引文
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[7]Benmokrane B,Zhang B R,Chennouf A.Tensile properties and pullout behaviour of AFRP and CFRP rods for grouted anchor applications[J].Construction and Building Materials,2000,14(3):157-170.
[8]赵艳林,韩超,张栓柱,等.海水拌养珊瑚混凝土抗压龄期强度试验研究[J].混凝土,2011 (2):43-45.
[9]王磊,刘存鹏,熊祖菁.剑麻纤维增强珊瑚混凝土力学性能试验研究[J].河南理工大学学报(自然科学版),2014,33(6):826-830.
[10]袁银峰.全珊瑚海水混凝土的配合比设计和基本性能[D].南京:南京航空航天大学,2015.
[11]Eligehausen R,Popov E P,Bertero V V.Local bond stress-slip relationships of deformed bars under generalized excitations[C]//Proceedings of the 7th European Conference on Earthquake Engineering.Vol.4.Athens :Techn.Chamber of Greece,1982,S:69-80.
[12]Cosenza E,Manfredi G,Realfonzo R.Bond characteristics and anchorage length of FRP rebars[C]//Proceedings of the 2nd International Conference on Advanced Composites Materialsin Bridge Struction,M.El-Badry,ed.1996.
[13]Malvar L J.Bond stress-slip characteristics of FRP rebars[R].Rep.TR-2013-SHR,Naval Facilities Engineering Service Center,California:Port Hueneme,1994.
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[15]张海霞.FRP 筋与混凝土粘结滑移性能研究[D].沈阳:东北大学,2006.
[16]高丹盈,李趁趁,李士会,等.GFRP筋与混凝土粘结滑移性能试验研究[J].工业建筑,2009(S):107-112.
[2]陈兆林,陈天月,曲勣明.珊瑚礁砂混凝土的应用可行性研究[J].海洋工程,1991,9(3):67-80.
[3]Howdyshell P A.The use of coral as an aggregate for Portland cement concrete structures[R].Construction Engineering Research Laboratory(Army) Champaign IL,1974.
[4]叶列平,冯鹏.FRP在工程结构中的应用与发展[J].土木工程学报,2006,39 (3):24-36.
[5]吴芳.玄武岩纤维筋与混凝土粘结性能试验研究 [D].大连:大连理工大学,2009.
[6]薛伟辰,康清梁.纤维塑料筋粘结锚固性能的试验研究[J].工业建筑,1999,29(12):5-7.
[7]Benmokrane B,Zhang B R,Chennouf A.Tensile properties and pullout behaviour of AFRP and CFRP rods for grouted anchor applications[J].Construction and Building Materials,2000,14(3):157-170.
[8]赵艳林,韩超,张栓柱,等.海水拌养珊瑚混凝土抗压龄期强度试验研究[J].混凝土,2011 (2):43-45.
[9]王磊,刘存鹏,熊祖菁.剑麻纤维增强珊瑚混凝土力学性能试验研究[J].河南理工大学学报(自然科学版),2014,33(6):826-830.
[10]袁银峰.全珊瑚海水混凝土的配合比设计和基本性能[D].南京:南京航空航天大学,2015.
[11]Eligehausen R,Popov E P,Bertero V V.Local bond stress-slip relationships of deformed bars under generalized excitations[C]//Proceedings of the 7th European Conference on Earthquake Engineering.Vol.4.Athens :Techn.Chamber of Greece,1982,S:69-80.
[12]Cosenza E,Manfredi G,Realfonzo R.Bond characteristics and anchorage length of FRP rebars[C]//Proceedings of the 2nd International Conference on Advanced Composites Materialsin Bridge Struction,M.El-Badry,ed.1996.
[13]Malvar L J.Bond stress-slip characteristics of FRP rebars[R].Rep.TR-2013-SHR,Naval Facilities Engineering Service Center,California:Port Hueneme,1994.
[14]Cosenza E,Manfredi G,Realfonzo R.Behavior and modeling of bond of FRP rebars to concrete[J].Journal of Composites for Construction,1997,1(2):40-51.
[15]张海霞.FRP 筋与混凝土粘结滑移性能研究[D].沈阳:东北大学,2006.
[16]高丹盈,李趁趁,李士会,等.GFRP筋与混凝土粘结滑移性能试验研究[J].工业建筑,2009(S):107-112.