摘要
碳纤维增强混凝土是在混凝土中掺入具有优良性能的碳纤维形成的一种复合材料。掺入的碳纤维可以增强混凝土的强度,减缓裂缝的发展,还有一定的耗能作用。另外,利用碳纤维自身的物理性能还可以将碳纤维混凝土作成一种新型智能材料。钢—混凝土组合肋壳是一种新型的大跨度空间组合结构,它同时拥有钢材和混凝土材料的优异性能。将钢肋置于肋梁的下部,钢肋内浇筑混凝土形成的组合肋,使钢材的受拉性能和混凝土的受压性能发挥到了极致。作为一种薄壳,其壳体在允许范围内做得越薄越好。本文提出将碳纤维混凝土材料用于组合肋壳,以其优良的性能,有望将薄壳做得更薄,同时能提高整个结构的承载力。论文利用ANSYS有限元软件对不同材料形式的薄壳及组合肋壳整体结构进行分析并将结果加以对比。论文主要内容如下:
1.在大量国内外实验数据的支持下,对碳纤维混凝土的各项力学性能及其智能性做了较系统地总结,并分析碳纤维混凝土自身的力学性能参数及其本构关系。
2.利用ANSYS有限元软件对不同跨度不同厚度的短切碳纤维增强混凝土和碳纤维配筋混凝土薄壳和开裂荷载、正常使用极限状态荷载及其极限承载力进行分析。另外,将碳纤维混凝土薄壳与钢筋混凝土薄壳进行对比分析选出较优材料方案做组合肋壳。结果显示碳纤维增强混凝土薄壳有一定优势。
3.利用ANSYS对碳纤维混凝土组合肋柱面壳进行弹塑性分析并与钢筋混凝土组合肋柱面壳性能做以对比。分析结果表明:大跨度空间钢—碳纤维混凝土组合肋壳的内力分布比较合理,是一种比较理想的空间结构形式。无论是弹性阶段还是塑性阶段,碳纤维混凝土组合肋壳都比钢筋混凝土表现出更好的变形、反力、内力及应力性能。
最后,对本文的研究内容做了总结,并对钢—碳纤维混凝土组合肋壳和碳纤维混凝土材料的发展前景及可能的研究方向做了展望。
The carbon fiber enhanced concrete is one of compound materials which mix the fine performance's carbon fiber in the concrete.With the carbon fiber mixed in,it will strengthen the intensity of the concretes,slows down the development of the crack,and has a function that can consumes energy.Moreover,by using the carbon fiber own physical property,the carbon fiber reinforced concrete will be changed to one kind of new intelligent material.The steel - concrete composite ribbed shell is one kind of new large span space structure,it has outstanding performance of both the steel and the concretes material.As one kind of thin shell,it can be casted as thinly as better in allows. It is proposed that the rib shell can be applied in the carbon fiber reinforced concrete material to use its fine performance,we hope to make the shell as thinly as we can or can enhance the supporting capacity of the entire structure.The paper uses the ANSYS finite element software to analyze the different material form's shell and the overall construction of the composite ribbed shell and contrasts the result at the same time.The papers primary coverage is listed as follows:
1.Under the massive domestic and foreign empirical datum's support,it is summarized on the carbon fiber concretes' each mechanical properties and its intelligence properties systematically,meanwhile,the paper analyzes the carbon fiber concretes own mechanical properties parameter and its O - erelationships.
2.The analysis is carried out on the dehiscence load,the normal use limiting condition load,the limit supporting capacity of the carbon fiber enhanced concretes and the carbon fiber reinforced bars concretes shell which with the different span different thickness by using the ANSYS finite element software.Moreover,the contrastive analysis on the carbon fiber concretes shell and the reinforced concrete shell is carried out to select the superior material plan applied in the composite ribbed shell.The result showed that the carbon fiber enhanced concretes shell has certain superiority.
3.By using the ANSYS,the detailed elastoplasticity analysis is studied in the carbon fiber concretes combination ribbed cylinder shell and the result contrasted with the reinforced concrete composite ribbed cylinder shell performance.The analysis result indicated:The distribution of large span space steel - carbon fiber concretes composite ribbed shell's endogenic force is quite reasonable,and this composte ribbedshell is one kind of quite ideal spatial structure form.Compared to the reinforced concrete, regardless of being the elastic stage or the plastic stage,the carbon fiber concretes composite ribbed shell performes a better distortion,reaction,endogenic force and the stress properties.
Finally,the thesis summarizes the research content and looks forward in the steel-carbon fiber concretes combination ribbed shell and the carbon fiber concretes material prospects' development and the possible research direction.
引文
[1]张毅刚等.大跨度空间结构.机械工业出版社.2005
[2]常玉珍.钢-混凝土组合肋壳非线性分析.西安:西安建筑科技大学,2007
[3]贺福,王茂章.碳纤维及其复合材料.北京:科学出版社,1995
[4]薛伟辰,康清梁.纤维筋在混凝土结构中的应用.工业建筑,1999(2):1-21
[5]耿志大.碳纤维增强混凝土.混凝土与水泥制品,1997(5):43-46
[6]邓宗才,孙成栋.碳纤维混凝土的压缩韧度指数.混凝土与水泥制品,2000(4):37-38
[7]张其颖,赵慧卿.碳纤维对超细水泥基体的增强作用.新型碳材料,1997(4):34-35
[8]张其颖.轻质碳纤维一水泥一硅粉复合材料.硅酸盐通报,1995(5):65-66
[9]郭全贵,李安邦,刘朗.碳纤维干混水泥及其力学性能研究.炭素技术,1996(6):13-17
[1O]郭全贵,岳秀珍,李安邦等.单丝拔出实验表征碳纤维增强水泥复合材料的界面.纤维复合材料,1995(3):42-46
[11]郭全贵,李安邦,刘朗.集束效应对CFRC复合材料界面及力学性能的影响.纤维复合材料,1996(3):34-37
[12]王起才,高悦.低掺量碳纤维混凝土试验研究.兰州铁道学院学报,1998(4):7-11
[13]王秀峰,王永兰,金志浩.碳纤维增强水泥复合材料的制备及性能.西安交通大学学报,1997
[14]D.D.L.Chung,Cement reinforced with short carbon fibers:a multifunctionai material,Composites,Part B 2000(31):511-526
[15]Jingyao Cao,D.D.L.Chung,Carbon fiber reinforced cement mortar improved by using acrylic dispersion as an admixture,Cement and Concrete Research,2001(31):1633-1637
[16]SihaiWen,D.D.L.Chung,Carbon fiber—reinforce cement as a thermistor,Cement and Concrete Research,1999(29):961-965
[17]SihalWen,D.D.L.Chung,Uniaxial tension in carbon fiber-reinforce cement,sensed by electrical resistivity measurement in longitudinal and transverse directions,Cement and Concrete Research,2000(30):1289-1294
[18]Zeng--Qiangshi,D.D.L.Chung,Carbon fiber-reinforce concrete for traffic monitoring and weighing in motion,Cement and Concrete Researeh1999(29):435-439
[19]毛起熠,赵斌元,李卓球等.水泥基碳纤维复合材料压敏性的研究.复合材料学报,1996(4):8-11
[20]毛起熠,杨元霞,李卓球等.碳纤维增强水泥压敏性的研究.硅酸盐学报,1997(6):734-742
[21]姚武,陈兵,吴科如.碳纤维水泥基材料的机敏特性研究.复合材料学报,2002(2):49-53
[22]陈兵,姚武,吴科如等.受压载荷下碳纤维水泥基材料机敏性研究.建筑材料学报,2002(2):108-113
[23]吴科如,陈兵,姚武.碳纤维机敏水泥基材料性能研究.同济大学学报,2002(4):456-463
[24]Bushnell.Computerized buckling analysis of shells,Kluwer Academic Publishers,Dordrecht,The Netherland.1989
[25]Billington,D.P.Thin Shell Concrete Structures.McGraw-Hill Book Compony.1965
[26]何军拥,姚立宁.碳纤维混凝土的特征及应用探讨.新型建筑材料,2006(4):12-13
[27]周建方,吴国松.碳纤维增强混凝土的研究现状和发展.河海大学常州分校学报,2002(4):1-6
[28]张其颖.碳纤维增强水泥发展概况.纤维复合材料,1995(2):50
[29]贺福,王茂章著.碳纤维及其复合材料,第1版,北京:科学出版社,1995
[30]Sarah Lynn Orton,Development of a CFRP System to Provide Continuity in Existing Reinforced Concrete Buildings Vulnerable to Progressive Collapse,The University of Texas at Austin,August 2007
[31]王曼霞,赵稼祥.碳纤维的发展、问题和对策.玻璃钢/复合材料,2000(1):48-51
[32]王荣国,武卫莉.复合材料概论,第1版.哈尔滨:哈尔滨工业大学出版社,1999
[33]吴人洁主编.复合材料,第1版.天津:天津大学出版社,2000
[34]孙家跃,杜海燕编.无机材料制造与应用,第1版.化学工业出版社,2001
[35]廖肃然,魏嫒.碳纤维的结构与表面性质.郑州纺织工学院学报,1998(1):54-58
[36]吕立斌,苟勇.碳纤维及其复合材料性能与应用.山东纺织科技,2004(6)53-56
[37]黄承逵.纤维混凝土结构.机械工业出版社,2004
[38]胡兴军.碳纤维:一种重要的建筑材料.四川建材,2004(3):15-18
[39]赵稼祥.世界高性能碳纤维的生产、市场与应用[J].新材料产业,2003,112(3):18-22
[40]刘丽娟,徐梁华,王广林.碳纤维增强水泥基复合材料的应用研究.材料科学与工程,2002(02):283-286
[41]刘慧一.FRP在混凝土结构中的应用[J].中南公路工程,1995(2):47-51
[42]张鹏,陆慎,邓字韦,树英.碳纤维塑料筋普通混凝土梁的试验研究.建筑技术,2004(12):933-935
[43]王勃,欧进萍,张新越等.FRP筋与混凝土粘结性能的试验研究.低温建筑技术,2006(1):39-41
[44]高丹盈,Benmokrane B.纤维聚合物筋混凝土的粘结机理及锚固长度的计算方法[J].水利学报,2000(11):70-78
[45]郭恒宁,张继文.碳纤维筋与混凝土粘结性能的试验研究.新型建筑材料,2006(10):9-12
[46]Benmokrane B,Tighiouart B,Chaallal O.Bond strength and load distribution of composite GFRP reinforcing bars in concrete[J].ACI Materials Journal,1996,93(3):246-253
[47]Tighiouart B,Benmokrane B,Gao D.Investigation of bond in concrete member with fiber reinforced polymer(FRP) bars[J].Construction and BuildingMaterials,1998,(12):453-462
[48]张作诚.碳纤维筋增强混凝土的试验研究及力学性能分析.南京:河海大学,2007
[49]Mahmoud M.Reda T,Nigel G S.Enhancing fracture toughness of high-performance carbon fiber cement composites[J].ACI Materials Journal,2001(2):168-177
[50]吴寅.碳纤维增强混凝土的力学性能[J].纤维复合材料,1995(3):47-49
[51]张卫东,徐学燕.碳纤维混凝土的特性及发展前景.森林工程,2004(1):61-63
[52]王秀峰,王永兰,金志浩.碳纤维增强水泥复合材料的电导性能及其应用[J].复合材料学报,1998,15(3):7580
[53]毛起熠,赵斌元,沈大荣,李卓球.水泥基碳纤维复合材料压敏性的研究[J].复合材料学报,1996,13(4):8-11
[54]D.D.L.Chung.Composites get smart[J].Materials Today.2002,5(1):30-35
[55]李广军,郑秀梅,王彬.碳纤维混凝土导电性能试验研究.佳木斯大学学报(自然科学版),2006(7):457-459
[56]沈文忠,张雄.碳纤维及碳纤维功能混凝土.上海建材,2004(2):16-18
[57]简华丽,谢慧才,刘金伟.碳纤维混凝土(粗骨料)中纤维含量对其力学、压敏性能的影响.混凝土,2003(12):21-32
[58]高路石,杨伟杰,陈利红.碳纤维混凝土技术及其在国内外研发的介绍.黑龙江交通科技,2006(7):5-6
[59]简华丽.多功能材料CFRC的性能及工程应用综述.混凝土与水泥制品,2003(05)40-42
[60]吴寅,李霞.碳纤维增强混凝土构件的力学性能研究.大连大学学报,1999(12):25-30
[61]唐祖全,李卓球,侯作富等.导电混凝土电热除冰化雪的功率分析[J].重庆建筑大学学报,2002,24(3):101-105
[62]D.D.L.Chung.Cement Reinforced with short Carbon Fibers:A Multi-functional Material,Composites,part B,2000,(31):511-526
[63]Park S B,Lee B I,Lim Y S.Experimental Study on the Engineering Properties of Carbon Fiber Reinforced Cement Composites.Cement and Concrete Research,1991,21(4):589-600
[64]周梅,刘海卿,曹启坤,刘书贤.短碳纤维增强高性能混凝土的性能和机理研究.应用基础与工程科学学报,2004(3):41-48
[65]张其颍.碳纤维增强水泥混凝土复合材料的研究与应用[J].纤维复合材料,2001(2):49-50
[66]韦文兵.短切碳纤维在水泥浆体中的分散性研究.建材与装饰,2007(9):17-18
[67]何建,石建军,杨建明,杨雨山.碳纤维增强轻骨料(陶粒)混凝土的单轴力学性能和断裂机理.邵阳学院学报(自然科学版),2007(3):78-81
[68]杨雨山,石建军,黄志刚.碳纤维增强轻骨料混凝土的试验研究.混凝土与水泥制品,2007(2):46-48
[69]邓宗才.碳纤维、钢纤维混凝土低周抗压疲劳特性的试验研究.水利学报,2002(2):39-43
[70]杨洪生,赵国才.碳纤维混凝土.2006(9):28-29
[71]钟光珞,赵冬.有限单元法及程序设计.陕西科学技术出版社.1997
[72]王新敏.ANSYS工程结构数值分析.人民准能出版社.2007
[73]江见鲸,陆新征,叶列平.混凝土结构有限元分析[M].北京:清华大学出版社.2004:86-141
[74]陈剑雄.碳纤维复合建材的开发与研究.中国搪瓷.2001,12(4):35-42
[75]过镇海,时旭东.钢筋混凝土原理和分析[M].北京:清华大学出版社.2003:82-127
[76]S.Timoshenko,Strength of Material,Part I,Elementary Theory and Problems,3rd Edition,D.Van Nostrand Co.,Inc.,New York,NY.1955:221-224
[77]王勖成.有限单元法[M].清华出版社,2003
[78]Yong Deng.Static and fatigue behaviors of RC beams strengthened with carbon fiber sheets bonded by organic and inorganic matrices.2002
[79]Eric Musselman.CHARACTERIZING BLAST AND IMPACT RESISTANCE OFLONG CARBON FIBER REINFORCED CONCRETE.2003
[80]钢筋混凝土薄壳结构设计规程(JGJ/T22-98).北京:中华人民共和国行业标准,1998
[81]邹君.柱面钢一混凝土组合肋壳竖向地震反应分析[D].西安:西安建筑科技大学,2007