空斗墙抗剪性能试验研究及有限元分析
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摘要
通过24片1/2模型的空斗墙墙体和3片1/2模型的实砌墙体,在低周反复荷载下试验,研究3种砌筑方式的空斗墙在2种高宽比、4种砂浆强度和2种竖向压应力的影响下,墙体的抗剪承载力和破坏模式。建立有限元分析模型,分析砌筑方式、材料强度、高宽比和竖向压应力对空斗墙抗剪性能的影响。研究表明:不同砌筑方式的空斗墙极限荷载接近,约为实砌墙体的60%～85%;抗剪承载力随着砖和砂浆强度的提高而增大;抗剪承载力随着高宽比的增大而减小,破坏模式从剪切破坏转变为弯曲破坏;当N/Nu=0.6左右时,抗剪承载力最大。在此基础上提出空斗墙的抗剪强度计算公式。
Based on the experimental study of twenty four half-scale row lock walls and three half-scale solid walls subjected to horizontal low-cycle loading,the capability of shear and failure pattern were analyzed,with the influence of three brickwork modes,two kinds of aspect ratio,four kinds of strength of mixed mortar and two kinds of vertical stress.The influence of brickwork mode,material strength,aspect ratio and vertical stress were analyzed by using the finite element model.The test and analysis results show that: the ultimate load of row lock walls with different brickwork modes is about 60%~85% of the ultimate load of solid wall.The shear bearing capacity increases as the material strength increases.The shear bearing capacity reduces as the aspect ratio increases,and the failure pattern is changed from shear failure to bending failure.When N/Nu is about 0.6,the shear bearing capacity is the greatest.The capability shear formula of the row lock walls is presented.
Based on the experimental study of twenty four half-scale row lock walls and three half-scale solid walls subjected to horizontal low-cycle loading,the capability of shear and failure pattern were analyzed,with the influence of three brickwork modes,two kinds of aspect ratio,four kinds of strength of mixed mortar and two kinds of vertical stress.The influence of brickwork mode,material strength,aspect ratio and vertical stress were analyzed by using the finite element model.The test and analysis results show that: the ultimate load of row lock walls with different brickwork modes is about 60%~85% of the ultimate load of solid wall.The shear bearing capacity increases as the material strength increases.The shear bearing capacity reduces as the aspect ratio increases,and the failure pattern is changed from shear failure to bending failure.When N/Nu is about 0.6,the shear bearing capacity is the greatest.The capability shear formula of the row lock walls is presented.
引文
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[2]冯守仁.常熟-太仓地震中空斗墙房屋的震害及今后建房的若干建议[J].工程抗震,1991,13(1):38-40.FENG Shouren.Seismic disaster of cavity wall buildings in changshu-taicang earthquake and suggestions on building houses[J].Earthquake Re-sistant Engineering,1991,13(1):38-40.(in Chinese)
[3]葛学礼,朱立新,于文,等.江西九江-瑞昌M5.7级地震空斗砖墙房屋震害分析[J].工程抗震与加固改造,2006,28(1):10-17.GE Xueli,ZHU Lixin,YU Wen,et al.Analysis of seismic disaster of cavity wall buildings in Jiujiang-ruichang earthquake(M5.7)[J].Earth-quake Resistant Engineering and Retrofitting,2006,28(1):10-17.(in Chinese)
[4]葛学礼,朱立新.浙江文成地震村镇空斗墙建筑震害分析[J].工程抗震与加固改造,2006,28(1):106-109.GE Xueli,ZHU Lixin.Earthquake damage analysis of building with cavity wall in Wencheng earthequake[J].Earthquake Resistant Engineeringand Retrofitting,2006,28(6):106-109.(in Chinese)
[5]魏文晖,熊利剑,吴亚丽.空斗墙砌体结构检测与非线性有限元动力分析[J].华中科技大学学报:城市科学版,2009,26(4):20-24.WEI Wenhui,XIONG Lijian,WU Yali.Testing and nonlinear finite element analysis on cavity wall structure[J].Journal of Huazhong Universityof Science and Technology:Urban Science Edition,2009,26(4):20-24.(in Chinese)
[6]李校兵,汤伟民,张清华,等.空斗墙片墙抗侧力性能试验研究[J].自然灾害学报,2010,19(2):8-12.LI Xiaobing,TANG Weimin,ZHANG Qinghua,et al.Test study on lateral resistance behavior of rowlock wall[J].Journal of Natural Disasters,2010,19(2):8-12.(in Chinese)
[7]刘桂秋.砌体结构基本受力性能的研究[D].长沙:湖南大学,2005.LIU Guiqiu.The research on the basic mechanical behavior of masonry structure[D].Changsha:Hunan University,2005.(in Chinese)
[8]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.GUO Zhenhai,SHI Xudong.Reinforced concrete theory and analyse[M].Beijing:Tsinghua University Press,2003.(in Chinese)
[9]冯建国,巴荣光,傅书麟.无筋墙体的抗震剪切强度[J].西安冶金建筑学院学报,1985,41(1):35-53.FENG Jianguo,BA Rongguang,FU Shulin.Experimental study on shear strength of unreinforced masonry walls under cyclic actions[J].Journal ofXi’an University of Architecture&Technology,1985,41(1):35-53.(in Chinese)
[10]GBJ3-88砌体结构设计规范[S].GBJ3-88 Code for Design of Masonry Structures[S].(in Chinese)
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