网状CBF增强砖砌体轴心受力性能试验研究
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摘要
网状CBF(Continuous Basalt Fiber,连续玄武岩纤维)增强砖砌体是将CBF布条按照特定的构造方式铺设在砌体水平灰缝砂浆层中,协同砖砌体共同工作的新型砌体结构形式。该文通过对5种不同横向配纤率,3种不同竖向纤维层构造的8组增强砖砌体试件进行轴心受压试验研究。初步试验结果表明:网状CBF增强砖砌体具有良好的强度储备,与无筋砖砌体相比,延性和轴心抗压强度都有明显改善。该文分析了试件的破坏形态和受力机理,以及对比横向配纤率和竖向配纤构造对砌体抗压性能的影响,最后,通过对试验数据的回归分析,给出了网状CBF增强砖砌体轴心承载力计算公式。
CBF(Continuous Basalt Fiber) Mesh Reinforced Brick Masonry is kind of collaborating brick masonry with a new masonry structure,which laid CBF cloth stripes between mortar layers in accordance with a specific structure.This paper studies the axial compression test through 8 groups of reinforced brick masonry specimen of 5 different horizontal fiber rates and 3 vertical fiber layer forms.The preliminary test results show that: CBF Mesh Reinforced Brick Masonry has a good reserve of strength,and the ductility and axial compressive strength have been improved significantly,comparing to the unreinforced brick masonry.The failure modes of the specimen and the stress mechanism are analyzed,and the influence on masonry compressive properties of horizontal fiber ratios and that of vertical fiber layer structures is compared.Finally,the calculation formula of the axis bearing capacity of CBF Mesh Reinforced Brick Masonry by regression analysis of test data is conducted.
CBF(Continuous Basalt Fiber) Mesh Reinforced Brick Masonry is kind of collaborating brick masonry with a new masonry structure,which laid CBF cloth stripes between mortar layers in accordance with a specific structure.This paper studies the axial compression test through 8 groups of reinforced brick masonry specimen of 5 different horizontal fiber rates and 3 vertical fiber layer forms.The preliminary test results show that: CBF Mesh Reinforced Brick Masonry has a good reserve of strength,and the ductility and axial compressive strength have been improved significantly,comparing to the unreinforced brick masonry.The failure modes of the specimen and the stress mechanism are analyzed,and the influence on masonry compressive properties of horizontal fiber ratios and that of vertical fiber layer structures is compared.Finally,the calculation formula of the axis bearing capacity of CBF Mesh Reinforced Brick Masonry by regression analysis of test data is conducted.
引文
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[10]沙吾列提.拜开依,沈祥.网状FRP增强砖砌体轴心受力性能试验研究[J].施工技术,2011,40(8):78―80.Sawulet Bekey,Shen Xiang.Experiment study of FRPmesh reinforced brick masonry under axial compressiveloading[J].Construction Technology,2011,40(8):78―80.(in Chinese)
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[2]Shrive N G.The use of fibre reinforced polymers toimprove seismic resistance of masonry[J].Constructionand Building Materials,2006,20:269―277.
[3]陈莹,王全凤,黄奕辉,等.GFRP复合材料与砖界面粘结性能的数值模拟[J].工程力学,2007,24(5):119―124.Chen Ying,Wang Quanfeng,Huang Yihui,et al.Numerical analysis for bonding in the interface betweenGFRP and clay brick[J].Engineering Mechanics,2007,24(5):119―124.(in Chinese)
[4]Milani G.Kinematic FE limit analysis homogenizationmodel for masonry walls reinforced with continuous FRPgrids[J].International Journal of Solids and Structures,2011,48:326―345.
[5]胡显奇,申屠年.连续玄武岩纤维(CBF)在军工及民用领域的应用[J].高科技纤维与应用,2005,30(6):7―13.Hu Xianqi,Shen Tunian.The applications of the CBF inwar industry and civil fields[J].Hi-Tech Fiber andApplication,2005,30(6):7―13.(in Chinese)
[6]刘立新.砌体结构[M].第4版.武汉:武汉理工大学出版社,2012:44―54.Liu Lixin.Masonry structures[M].4th Edition.Wuhan:Wuhan University of Technology Press,2012:44―54.(in Chinese)
[7]吴方伯,陈伟,黄海林,等.新型混凝土横孔空心砌块砌体受压性能研究[J].湖南大学学报(自然科学版),2010,37(11):1―5.Wu Fangbo,Chen Wei,Huang Hailin,et al.Research onthe compression behavior of a new type of concretehorizontal-hole hollow block masonry[J].Journal ofHunan University(Natural Sciences),2010,37(11):1―5.(in Chinese)
[8]曹万林,王卿,周中一,等.再生混凝土砖砌体抗压性能试验研究[J].世界地震工程,2011,27(3):17―22.Cao Wanlin,Wang Qing,ZHou Zhongyi,et al.Experimental study on compression performance ofrecycled concrete brick masonry[J].World EarthquakeEngineering,2011,27(3):17―22.(in Chinese)
[9]唐岱新,龚绍熙,周炳章.砌体结构设计规范理解与应用[M].第二版.北京:中国建筑工业出版社,2012:15―23.Tang Daixin,Gong Shaoxi,Zhou Bingzhang.Understanding and application of code for design ofmasonry structures[M].2nd ed.Beijing:ChinaArchitecture and Building Press,2012:15―23.(inChinese)
[10]沙吾列提.拜开依,沈祥.网状FRP增强砖砌体轴心受力性能试验研究[J].施工技术,2011,40(8):78―80.Sawulet Bekey,Shen Xiang.Experiment study of FRPmesh reinforced brick masonry under axial compressiveloading[J].Construction Technology,2011,40(8):78―80.(in Chinese)
[11]GB50003-2011,砌体结构设计规范[S].北京:中国建筑工业出版社,2011.GB 50003-2011,Code for design of masonry structures[S].Beijing:China Architecture and Building Press,2011.(in Chinese)
[12]周炳章.砌体结构抗震的出路在于发展配筋砌体[J].建筑结构,2009,29(12):159―162.Zhou Bingzhang.Reinforcement is the solution for theearthquake resistance of masonry structure[J].BuildingStructure,2009,29(12):159―162.(in Chinese)
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