高强钢绞线-聚合物砂浆加固低强度空斗墙的试验研究
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摘要
进行3片采用高强钢绞线-聚合物砂浆加固的低强度空斗墙和1片未加固空斗墙的低周反复荷载试验,研究加固前后空斗墙的破坏形态、承载能力、变形能力、刚度退化、滞回特性以及耗能能力等抗震性能。试验结果表明,高强钢绞线-聚合物砂浆加固能有效提高低强度空斗墙的承载力和变形能力,提高初始刚度并延缓刚度退化过程。采用已有的经验公式对加固前、后空斗墙的抗剪承载力的计算结果表明,计算值与试验结果基本吻合。
One unstrengthened low strength cavity wall and three cavity walls strengthened with high strength steel wire and polymer mortar were tested under low frequency cyclic horizontal load.The failure mode,ultimate strength,hysteresis loops,stiffness degradation,and energy dissipation of these walls were analyzed.The test results showed that the bearing capacity and deformability of the strengthened cavity walls increased significantly;the initial stiffness was improved and the stiffness degradation was retarded.The shear bearing capacities of cavity walls before and after strengthening were calculated using empiric formulas and the calculation results were close to experimental results.
One unstrengthened low strength cavity wall and three cavity walls strengthened with high strength steel wire and polymer mortar were tested under low frequency cyclic horizontal load.The failure mode,ultimate strength,hysteresis loops,stiffness degradation,and energy dissipation of these walls were analyzed.The test results showed that the bearing capacity and deformability of the strengthened cavity walls increased significantly;the initial stiffness was improved and the stiffness degradation was retarded.The shear bearing capacities of cavity walls before and after strengthening were calculated using empiric formulas and the calculation results were close to experimental results.
引文
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[6]JGJ 101—96建筑抗震试验方法规程[S].
[7]GBJ 3—88砌体结构设计规范[S].
[8]施楚贤.砌体结构理论与设计[M].2版.北京:中国建筑工业出版社,2003:51-143.
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[10]徐明刚,邱洪兴,傅传国.高强钢绞线网—聚合物砂浆加固砖墙受剪承载力计算新方法[J].建筑科学,2008,24(5):71-72.
[11]GB 50010—2002混凝土结构设计规范[S].
[2]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(6):106-109.
[3]王亚勇,姚秋来,王忠海,等.高强钢绞线网-聚合物砂浆复合面层加固砖墙的试验研究[J].建筑结构,2005,35(8):36-40.
[4]张蔚,李爱群,姚秋来,等.高强钢绞线网-聚合物砂浆抗震加固既有建筑砖墙体试验研究[J].建筑结构学报,2009,30(4):55-60.
[5]杨建平,李爱群,王亚勇,等.高强钢绞线-聚合物砂浆加固低强度砖砌体的试验研究[J].防灾减灾工程学报,2008,28(4):473-478.
[6]JGJ 101—96建筑抗震试验方法规程[S].
[7]GBJ 3—88砌体结构设计规范[S].
[8]施楚贤.砌体结构理论与设计[M].2版.北京:中国建筑工业出版社,2003:51-143.
[9]骆万康,朱希诚,廖春盛.砖砌体剪压复合受力相关性与抗剪摩擦系数的取值.工程力学,1997(增刊1):249-257.
[10]徐明刚,邱洪兴,傅传国.高强钢绞线网—聚合物砂浆加固砖墙受剪承载力计算新方法[J].建筑科学,2008,24(5):71-72.
[11]GB 50010—2002混凝土结构设计规范[S].
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