超高韧度水泥基修复剪力墙试验的数值分析
详细信息 本馆镜像全文    |  推荐本文 | | 获取馆网全文
摘要
采用扩展有限元方法(XFEM)与内聚力裂缝模型相结合,模拟超高韧度水泥基(ECC)修复震损剪力墙中混凝土和ECC材料内部的裂缝开展,以及界面裂缝在ECC与混凝土界面之间开展的力学行为,并在此基础上数值再现了原有钢筋混凝土墙体及修复后墙体在侧向荷载作用下的反应.结果表明:将扩展有限元方法与基于界面的内聚力模型相结合,可较好地模拟有黏结界面的修复后剪力墙的受力行为,有限元模拟计算结果的极限承载力和相应位移与试验结果吻合良好.
The extended finite element method(XFEM)combined with cohesive zone model was adopted for numerical analysis on seismic damaged reinforced concrete(RC)shear wall repaired with engineered cementitious composites(ECC).The simulation focused on the crack initiating and propagating in concrete and ECC and interfacial fracture between concrete and ECC.Based on that,the mechanical behaviors of the original RC wall and repaired wall were modeled for the seismic performance under lateral loads.It is shown that the method can well simulate the mechanical behaviors of the repaired shear wall with bonded interface,and numerical analysis results have a good agreement with test results in ultimate bearing capacity.
引文
[1]周颖,吕西林.智力地震钢筋混凝土高层建筑震害对我国高层结构设计的启示[J].建筑结构学报,2011,32(5):17.ZHOU Ying,LXilin.Lessons learnt from damages of reinforced concrete tall buildings in Chile Earthquake and revelations to structural design in China[J].Journal of Building Structures,2011,32(5):17.
    [2]孙治国,王东升,李宏男,等.汶川地震钢筋混凝土框架震害及震后修复建议[J].自然灾害学报,2010,19(4):114.SUN Zhiguo,WANG Dongsheng,LI Hongnan,et al.Damage investigation of RC frames in Wenchuan earthquake and suggestions for post-earthquake rehabilitation[J].Journal of Natural Disasters,2010,19(4):114.
    [3]吴振波,周献祥,谢伟,等.汶川地震建筑震害调查统计与抗震设计思考[J].建筑结构,2010,40(增刊):144.WU Zhenbo,ZHOU Xianxiang,XIE Wei,et al.Statistics of Wenchuan earthquake investigation and some ideas on seismic design of buildings[J].Building Structure,2010,40(Suppl.):144.
    [4]Li V C.高延性纤维增强水泥基复合材料的研究进展及应用[J].硅酸盐学报,2007,35(4):531.Li V C.Progress and applications of engineered cementitious composites[J].Journal of Chinese Ceramic Society,2007,35(4):531.
    [5]张远淼.震损混凝土结构修复技术的试验与机理研究[D].上海:同济大学,2014.ZHANG Yuanmiao.Experimental and mechanistic study on repair technique to seismic damaged concrete structures[D].Shanghai:Tongji University,2014.
    [6]Barenblatt G I.The mathematical theory of equilibrium cracks in brittle fracture[J].Advances in Applied Mechanics,1962,7:55.
    [7]Dugdale D S.Yielding of steel sheets containing slits[J].Journal of Mechanics and Physics of Solids,1960,8:100.
    [8]Hillerborg A.Results of three comparative test series for determining the fracture energy GF of concrete[J].Materials and Structures,1985,18:407.
    [9]Belytschko T,Black T.Elastic crack growth in finite elements with minimal remeshing[J].International Journal for Numerical Methods in Engineering,1999,45(5):601.
    [10]Mos N,Dolbow J,Belytschko T.A finite element method for crack growth without remeshing[J].International Journal for Numerical Methods in Engineering,1999,46(1):131.
    [11]CEB-90.CEB-FIP model code 1990[S].London:Thomas Telford House,1991.
    [12]Park R,Pauley T.Reinforced concrete structures[M].New York:John-Wiley&Sons,1975.
    [13]MacGregor J G,Wight J K,Teng S,et al.Reinforced concrete:mechanics and design[M].Upper Saddle River,NJ:Prentice Hall,1997.

版权所有:© 2023 中国地质图书馆 中国地质调查局地学文献中心