玻璃纤维加固砖柱试验
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摘要
进行了42个(14组)玻璃纤维(GFRP)片材全长包裹砖砌体柱和9个(3组)对比砖柱的轴压试验,探讨了GFRP片材黏贴层数、试件截面尺寸、砂浆强度及倒角半径等参数对加固效果的影响;在考虑截面有效约束区和非有效约束区的基础上,重点分析了截面尺寸对加固效果的影响。试验结果表明:由于GFRP片材的约束作用,延缓了砖柱初始裂缝的出现,加固后试件的极限强度与黏贴层数呈线性关系,采用GFRP片材包裹加固砖柱能明显提高轴压极限强度与峰值应变。
Forty-two(fourteen groups) brick masonry columns whole along wrapped by glass fiber reinforced plastic(GFRP) sheets and nine(three groups) brick masonry columns for comparison were tested under axial compression.The influences which were considered to affect the confinement of brick masonry columns were as follows:stick layers of GFRP sheets,sectional size of specimens, strength of mortar,and radius at the corners etc.By considering the effective controlling area and the ineffective controlling area in the column section,author intensively analyzed the influence of sectional size to reinforced result.The experiment results indicate that because of the confined effect of GFRP sheets,the appearance of initial crack is postponed;the ultimate strength of reinforced testing column and stick layers are in linear relation;GFRP sheets can obviously enhance the ultimate axial compression strength and the peak value of brick masonry columns.
Forty-two(fourteen groups) brick masonry columns whole along wrapped by glass fiber reinforced plastic(GFRP) sheets and nine(three groups) brick masonry columns for comparison were tested under axial compression.The influences which were considered to affect the confinement of brick masonry columns were as follows:stick layers of GFRP sheets,sectional size of specimens, strength of mortar,and radius at the corners etc.By considering the effective controlling area and the ineffective controlling area in the column section,author intensively analyzed the influence of sectional size to reinforced result.The experiment results indicate that because of the confined effect of GFRP sheets,the appearance of initial crack is postponed;the ultimate strength of reinforced testing column and stick layers are in linear relation;GFRP sheets can obviously enhance the ultimate axial compression strength and the peak value of brick masonry columns.
引文
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[12]薛伟辰,王晓辉.有黏结预应力CFRP筋混凝土梁试验及非线性分析[J].中国公路学报,2007,20(4):41-47.XUE Wei-chen,WANG Xiao-hui.Experiment andNonlinear Analysis of Concrete Beams with BondedPrestressing CFRP Tendons[J].China Journal ofHighway and Transport,2007,20(4):41-47.
[2]欧阳煜,黄奕辉,钱在兹,等.玻璃纤维(GFRP)片材约束混凝土的受力性能分析[J].土木工程学报,2004,37(3):26-34.OUYANG Yu,HUANG Yi-hui,QIAN Zai-zi,et al.Analysis of Flexural Behavior of Concrete Beam Re-strained with Glass Fiber Reinforced Plastic Sheet[J].China Civil Engineering Journal,2004,37(3):26-34.
[3]卢亦焱,史健勇,赵国藩.玻璃纤维布约束轴心受压混凝土方形柱承载力计算研究[J].工程力学,2004,21(4):22-27.LU Yi-yan,SHI Jian-yong,ZHAO Guo-fan.Study ofAxial Bearing Capacity of Square Concrete ColumnsConfined with Carbon Fiber Reinforced Plastic[J].Engineering Mechanics,2004,21(4):22-27.
[4]王欣,陆洲导,吕西林.碳纤维技术在砌体结构抗震加固中的试验研究[J].工业建筑,2003,33(9):11-13.WANG Xin,LU Zhou-dao,LU Xi-lin.An Investiga-tion of the Aseismatic Behavior of Masonry StructureStrengthened by Carbon Fiber Reinforced Plastics[J].Industrial Construction,2003,33(9):11-13.
[5]赵彤,张晨军,谢剑,等.碳纤维布加固修复砖砌体的研究与工程实践[J].地震工程与工程振动,2001,21(2):89-95.ZHAO Tong,ZHANG Chen-jun,XIE Jian,et al.Ex-perimental Study on Seismic Reinforcement of BrickMasonry Walls with Continuous Carbon Fiber Sheet[J].Earthquake Engineering and Engineering Vibra-tion,2001,21(2):89-95.
[6]刘新强.FRP加固砌体基本力学性能研究[D].沈阳:沈阳建筑大学,2005.LIU Xin-qiang.Studies on Basic Mechanics Propertiesof Brick Masonry Reinforced with FRP[D].Sheny-ang:Shenyang Jianzhu University,2005.
[7]田水,彭少民,谷倩.碳纤维加固实心粘土砖偏心受压柱的试验研究[J].砖瓦,2005,32(10):3-6.TIAN Shui,PENG Shao-min,GU Qian.ExperimentResearch on Eccentrically Loaded Brick ColumnsStrengthened by CFRP[J].Brick and Tile,2005,32(10):3-6.
[8]GBJ 129—90,砌体基本力学性能试验方法标准[S].GBJ 129—90,Standard of Basic Mechanical Proper-ties and Experimental Methods of Masonry[S].
[9]姚振钢,刘祖华.建筑结构试验[M].上海:同济大学出版社,2004.YAO Zhen-gang,LIU Zu-hua.Test on the BuildingStructure[M].Shanghai:Tongji University Press,2004.
[10]施楚贤.砌体结构理论与设计[M].北京:中国建筑工业出版社,2003.SHI Chu-xian.Theory and Design of Masonry Build-ing[M].Beijing:China Architecture&BuildingPress,2003.
[11]潘景龙,王雨光,来文汇.混凝土柱截面形状对纤维包裹加固效果的影响[J].工业建筑,2001,31(6):17-19.PAN Jing-long,WANG Yu-guang,LAI Wen-hui.Effect of Sectional Shape of Concrete Column on theBearing Capacity of Short Columns Wrapped withFRP[J].Industrial Construction,2001,31(6):17-19.
[12]薛伟辰,王晓辉.有黏结预应力CFRP筋混凝土梁试验及非线性分析[J].中国公路学报,2007,20(4):41-47.XUE Wei-chen,WANG Xiao-hui.Experiment andNonlinear Analysis of Concrete Beams with BondedPrestressing CFRP Tendons[J].China Journal ofHighway and Transport,2007,20(4):41-47.
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