FRP阻裂增强梁的有限元分析与试验研究
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摘要
基于断裂力学原理的钢筋混凝土结构破坏过程的分析,作者所在的课题组经过大量的试验研究,提出了基于“放”、“阻”、“抗”的三种裂纹控制方法和相应的多种新型钢筋混凝土结构。新型结构具有优良的力学性能,是对传统的混凝土结构的有益的补充。新型复合钢筋混凝土结构大量的试验和实践已经证明了其强大的生命力。
本文针对基于“阻”的裂纹控制思想的含“FRP”阻裂增强层的混凝土结构的阻裂机理进行了深入的分析、有限元计算和试验研究。首先对新型复合结构的两条断裂力学机理进行了认真深入的分析表明FRP是通过两种方式:即以集中闭合力和变边裂纹为内部裂纹的方式发挥作用。然后利用有限元计算软件MSC.Marc对FRP阻裂增强机理进行了有限元计算分析,验证了了FRP优越的阻裂增强性能,并且针对影响FRP阻裂增强效果的因素进行了深入的计算,揭示了阻裂增强层厚度,弹性模量以及剥离长度对阻裂增强效果的影响规律得出了FRP的作用将使混凝土梁的裂纹在0.7~0.75倍梁高度止裂的重要结论,以及多裂纹下新裂纹的发展规律;最后通过对不同FRP材料、不同粘贴方式和不同粘贴层数以的小梁试件的试验,验证了这些影响规律。
本文为新型复合钢筋混凝土结构的阻裂增强机理提供了可靠的理论和试验验证,并为阻裂增强材料的选取提出了有益的建议。
The analysis of the failure process of the reinforcement concrete structure based on the fracture mechanics, after many experiment research, the research team which author have been in put forward the three crack-resistance technique named“Retarding”,“Releasing”and“Resisting”and relative new type reinforcement concrete structures. The new structures has many excellent mechanics behavior, and is a supplement to the traditional structure. It already proves its powerful life-force by many experimental and practice.
The paper based on the fracture mechanic principle, point at the concrete structure with crack-arresting layer which is based on the“Retarding”, analysis the crack-arresting principle in-depth, and compute it by using the finite element analysis method and experimental validate. First, the in-depth analysis the two fracture mechanic mechanism indicates that the FRP is bring into play by concentrate close force and change the edge crack into inside crack. Then, by using the software MSC.Marc, the crack-arresting principle is calculated by finite element analysis, validate that the FRP crack-arresting layer have predominant crack-arresting behavior, and calculated the law of thickness of the FRP crack-arresting, elastic model, peeling length which effect the crack-arresting result, concluded that the crack-height will be stopped at the height of 0.7 to 0.75 girder’s height, the growth law of new crack under more cracks . Last, small girders experiments have been done to validate the law of different FRP material, different stick method, different FRP layers.
Through the calculation of finite element method and experiment, the law of FRP crack-arresting has been explored. It’s provide reliable theory and experiment validate to the FRP crack-arresting, and is useful for the select of FRP material.
本文针对基于“阻”的裂纹控制思想的含“FRP”阻裂增强层的混凝土结构的阻裂机理进行了深入的分析、有限元计算和试验研究。首先对新型复合结构的两条断裂力学机理进行了认真深入的分析表明FRP是通过两种方式:即以集中闭合力和变边裂纹为内部裂纹的方式发挥作用。然后利用有限元计算软件MSC.Marc对FRP阻裂增强机理进行了有限元计算分析,验证了了FRP优越的阻裂增强性能,并且针对影响FRP阻裂增强效果的因素进行了深入的计算,揭示了阻裂增强层厚度,弹性模量以及剥离长度对阻裂增强效果的影响规律得出了FRP的作用将使混凝土梁的裂纹在0.7~0.75倍梁高度止裂的重要结论,以及多裂纹下新裂纹的发展规律;最后通过对不同FRP材料、不同粘贴方式和不同粘贴层数以的小梁试件的试验,验证了这些影响规律。
本文为新型复合钢筋混凝土结构的阻裂增强机理提供了可靠的理论和试验验证,并为阻裂增强材料的选取提出了有益的建议。
The analysis of the failure process of the reinforcement concrete structure based on the fracture mechanics, after many experiment research, the research team which author have been in put forward the three crack-resistance technique named“Retarding”,“Releasing”and“Resisting”and relative new type reinforcement concrete structures. The new structures has many excellent mechanics behavior, and is a supplement to the traditional structure. It already proves its powerful life-force by many experimental and practice.
The paper based on the fracture mechanic principle, point at the concrete structure with crack-arresting layer which is based on the“Retarding”, analysis the crack-arresting principle in-depth, and compute it by using the finite element analysis method and experimental validate. First, the in-depth analysis the two fracture mechanic mechanism indicates that the FRP is bring into play by concentrate close force and change the edge crack into inside crack. Then, by using the software MSC.Marc, the crack-arresting principle is calculated by finite element analysis, validate that the FRP crack-arresting layer have predominant crack-arresting behavior, and calculated the law of thickness of the FRP crack-arresting, elastic model, peeling length which effect the crack-arresting result, concluded that the crack-height will be stopped at the height of 0.7 to 0.75 girder’s height, the growth law of new crack under more cracks . Last, small girders experiments have been done to validate the law of different FRP material, different stick method, different FRP layers.
Through the calculation of finite element method and experiment, the law of FRP crack-arresting has been explored. It’s provide reliable theory and experiment validate to the FRP crack-arresting, and is useful for the select of FRP material.
引文
[1]江见鲸、李杰、金伟良·高等钢筋混凝土结构·中国建筑工业出版社·2007
[2]周志祥·高等钢筋混凝土结构·人民交通出版社·2002
[3]王传志、滕智明·钢筋混凝土结构理论·中国建筑工业出版社·1985
[4]天津大学、同济大学、东南大学·混凝土结构·中国建筑工业出版社(第二版)·1998
[5]叶见曙·结构设计原理·人民交通出版社·2003
[6]丁大钧(主编)、丁大钧等·钢筋混凝土结构学·上海科学技术出版社·1985
[7](美)A. H. 尼尔逊、G. 温特尔(著)·过镇海、方鄂华、王娴明(译校)·混凝土结构设计·中国建筑工业出版社·1994
[8](德)F. 莱昂哈特(著)、胡贤章、程积高(译)·钢筋混凝土结构裂缝与变形的验算·水利水电出版社·1983
[9] 沈浦生、罗国祥·混凝土结构疑难释义·武汉工业大学出版社·1992
[10]易志坚等·基于断裂力学原理的钢筋混凝土复合新结构设计理论研究·国家自然科学基金项目·2006
[11] 杨庆国·基于断裂力学原理的一种复合钢筋混凝土新结构·硕士论文·2002
[12] 陈强·FRP 复合钢筋混凝土受弯构件实验研究及承载力极限状态数值模拟分析·硕士论文·2003
[13] 何小兵·复合钢筋混凝土新结构进一步研究与“放阻”相结合的裂缝控制新方法·硕士论文·2004
[14] 陈舣亦·GFRP 复合钢筋混凝土梁增强性能分析研究·硕士论文·2005
[15] 车承志·“放阻”结合的复合钢筋混凝土新结构的力学原理与实验研究·硕士论文·2005 [16 甘贤军·GFRP 加固钢筋混凝土梁(受弯构件)试验研究·硕士论文·2004
[17]常国强·预裂高强钢筋混凝土结构疲劳实验研究·2007
[18]李建伟·预裂预应力混凝土疲劳性能分析·2007
[19] 赵国藩·高等钢筋混凝土结构·中国建筑工业出版社·2002
[20]林同炎、NED H.BURNS 著·路湛沁、黄棠、马誉美译·预应力混凝土结构设计·中国铁道出版社·1983
[21]洪起超·工程断裂力学基础·上海交通大学出版社·1987
[22] 徐芝纶·弹性力学简明教程·高等教育出版社·第二版·1983
[23] 尹双增.断裂损伤理论及应用·清华大学出版社·1992
[24]陈箎、蔡其巩、王仁智·工程断裂力学·国防工业出版社·1977
[25] 蔡四维、蔡敏·混凝土的损伤断裂·人民交通出版社·1999
[26] 徐世烺、赵国藩·混凝土断裂力学研究·大连理工大学出版社·1991
[27]江见鲸、陆新征、叶列平·混凝土结构有限元分析·清华大学出版社·2005
[28] 张泽华、彭图让· 水泥和混凝土的断裂韧度测试·第六届全国断裂学术会议论文集·1991
[29]中国航空研究院·应力强度因子手册·科学出版社·1981
[30]腾锦光、陈建飞等·FRP 加固混凝土结构·中国建筑工业出版社·2004
[31]岳清瑞、杨勇新·复合材料在建筑加固、修复中的应用·化学工业出版社·2006
[32]练章华 现代 CAE 技术与应用教程·石油工业出版社·2004
[33]阚前华、常志宇·MSC.Marc 工程应用实例分析与二次开发·中国水利水电出版社·2006
[34]陈火红、于军泉 、席源山·MSC.Marc/Mentat 2003 基础与应用实例·科学出版社·2004
[35]陈火红·MSC.Marc 有限元实例分析教程·机械工业出版社·2002
[36]朱伯方·有限单元法原理与应用·中国水利水电出版社·2004
[37]Smith,S.T.and Teng,J.G.· Interfacial stresses in plated RC beams · Engineering Structures · Vol.23,No.7·2001
[38] Varastehpour, H.and Hamelin,P.· Strengthening of concrete using fiber-reinforced plastics·Materials and Structures,Vol.30·1997
[39]Oh B.H. Fatigue analysis of plain concrete in flexure·Journal of Structural Engineering·1986· 112(2) ·273-288.
[40] W. Jansze ·Strengthening of Reinforced Concrete Members in Bending by Externally Bonded Steel Plates.·Delft University Press· 1997.
[41] Hamid Saadatmanesh and Mohammad R. Ehsani· Experimental Study of Concrete Girders Retrofitted with Epoxy-Bonded Composite Laminates· Journal of Structural Engineering · ASCE · V. 117 · No. 11 · November 1991.
[42]John F. Bonacci and Mohamed Maalej·Externally Bonded Fiber-Reinforced Polymer for Rehabilitation of Corrosion Damaged Concrete Beams · ACI Structure Journal· September-October 2000
[43] Stephen Kurtz and P. Balaguru. · Comparison of Inorganic and Organic Matrices for Strengthening of RC Beams With Carbon Sheets · Journal of Structural Engineering· January 2001.
[44] Hussain M. etc. · Flexural Behavior of Precracked Reinforced Concrete Beams Strengthened Externally by Steel Plates · ACI Structure Journal Vol. 91, No 1 · Jan-Feb 1995.
[2]周志祥·高等钢筋混凝土结构·人民交通出版社·2002
[3]王传志、滕智明·钢筋混凝土结构理论·中国建筑工业出版社·1985
[4]天津大学、同济大学、东南大学·混凝土结构·中国建筑工业出版社(第二版)·1998
[5]叶见曙·结构设计原理·人民交通出版社·2003
[6]丁大钧(主编)、丁大钧等·钢筋混凝土结构学·上海科学技术出版社·1985
[7](美)A. H. 尼尔逊、G. 温特尔(著)·过镇海、方鄂华、王娴明(译校)·混凝土结构设计·中国建筑工业出版社·1994
[8](德)F. 莱昂哈特(著)、胡贤章、程积高(译)·钢筋混凝土结构裂缝与变形的验算·水利水电出版社·1983
[9] 沈浦生、罗国祥·混凝土结构疑难释义·武汉工业大学出版社·1992
[10]易志坚等·基于断裂力学原理的钢筋混凝土复合新结构设计理论研究·国家自然科学基金项目·2006
[11] 杨庆国·基于断裂力学原理的一种复合钢筋混凝土新结构·硕士论文·2002
[12] 陈强·FRP 复合钢筋混凝土受弯构件实验研究及承载力极限状态数值模拟分析·硕士论文·2003
[13] 何小兵·复合钢筋混凝土新结构进一步研究与“放阻”相结合的裂缝控制新方法·硕士论文·2004
[14] 陈舣亦·GFRP 复合钢筋混凝土梁增强性能分析研究·硕士论文·2005
[15] 车承志·“放阻”结合的复合钢筋混凝土新结构的力学原理与实验研究·硕士论文·2005 [16 甘贤军·GFRP 加固钢筋混凝土梁(受弯构件)试验研究·硕士论文·2004
[17]常国强·预裂高强钢筋混凝土结构疲劳实验研究·2007
[18]李建伟·预裂预应力混凝土疲劳性能分析·2007
[19] 赵国藩·高等钢筋混凝土结构·中国建筑工业出版社·2002
[20]林同炎、NED H.BURNS 著·路湛沁、黄棠、马誉美译·预应力混凝土结构设计·中国铁道出版社·1983
[21]洪起超·工程断裂力学基础·上海交通大学出版社·1987
[22] 徐芝纶·弹性力学简明教程·高等教育出版社·第二版·1983
[23] 尹双增.断裂损伤理论及应用·清华大学出版社·1992
[24]陈箎、蔡其巩、王仁智·工程断裂力学·国防工业出版社·1977
[25] 蔡四维、蔡敏·混凝土的损伤断裂·人民交通出版社·1999
[26] 徐世烺、赵国藩·混凝土断裂力学研究·大连理工大学出版社·1991
[27]江见鲸、陆新征、叶列平·混凝土结构有限元分析·清华大学出版社·2005
[28] 张泽华、彭图让· 水泥和混凝土的断裂韧度测试·第六届全国断裂学术会议论文集·1991
[29]中国航空研究院·应力强度因子手册·科学出版社·1981
[30]腾锦光、陈建飞等·FRP 加固混凝土结构·中国建筑工业出版社·2004
[31]岳清瑞、杨勇新·复合材料在建筑加固、修复中的应用·化学工业出版社·2006
[32]练章华 现代 CAE 技术与应用教程·石油工业出版社·2004
[33]阚前华、常志宇·MSC.Marc 工程应用实例分析与二次开发·中国水利水电出版社·2006
[34]陈火红、于军泉 、席源山·MSC.Marc/Mentat 2003 基础与应用实例·科学出版社·2004
[35]陈火红·MSC.Marc 有限元实例分析教程·机械工业出版社·2002
[36]朱伯方·有限单元法原理与应用·中国水利水电出版社·2004
[37]Smith,S.T.and Teng,J.G.· Interfacial stresses in plated RC beams · Engineering Structures · Vol.23,No.7·2001
[38] Varastehpour, H.and Hamelin,P.· Strengthening of concrete using fiber-reinforced plastics·Materials and Structures,Vol.30·1997
[39]Oh B.H. Fatigue analysis of plain concrete in flexure·Journal of Structural Engineering·1986· 112(2) ·273-288.
[40] W. Jansze ·Strengthening of Reinforced Concrete Members in Bending by Externally Bonded Steel Plates.·Delft University Press· 1997.
[41] Hamid Saadatmanesh and Mohammad R. Ehsani· Experimental Study of Concrete Girders Retrofitted with Epoxy-Bonded Composite Laminates· Journal of Structural Engineering · ASCE · V. 117 · No. 11 · November 1991.
[42]John F. Bonacci and Mohamed Maalej·Externally Bonded Fiber-Reinforced Polymer for Rehabilitation of Corrosion Damaged Concrete Beams · ACI Structure Journal· September-October 2000
[43] Stephen Kurtz and P. Balaguru. · Comparison of Inorganic and Organic Matrices for Strengthening of RC Beams With Carbon Sheets · Journal of Structural Engineering· January 2001.
[44] Hussain M. etc. · Flexural Behavior of Precracked Reinforced Concrete Beams Strengthened Externally by Steel Plates · ACI Structure Journal Vol. 91, No 1 · Jan-Feb 1995.