钢筋网水泥砂浆面层加固砖墙受剪承载力分析
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摘要
针对采用钢筋网水泥砂浆面层加固砖墙的受剪承载力计算公式中未考虑原砖墙轴压比和高宽比等因素影响,及砖墙抗剪强度计算公式未考虑高宽比影响的问题,分析了高宽比为0.4～2.5,轴压比为0.1～0.8的砖墙采用配筋率为0.0%～0.5%,水泥砂浆强度等级为M5～M15的钢筋网水泥砂浆面层加固前后受剪承载力.基于分析结果,提出了考虑高宽比和轴压比影响的砖墙抗剪强度计算方法,以及考虑高宽比、原砖墙轴压比、面层配筋率及面层砂浆强度等级影响的钢筋网水泥砂浆面层加固砖墙受剪承载力计算方法.研究结果具有实用性,为砌体加固设计和施工提供了技术手段.
In the existing calculation methods,the shear capacity of brick masonry walls strengthened with reinforced mortar layers was calculated without considering the influence of aspect ratio and axial compression ratio and the impact of the aspect ratio was also not considered in the method of calculating shear strength of brick masonry walls before strengthening.The shear capacity of brick masonry walls with aspect ratio ranging from 0.4 to 2.5 and axial compression ratio ranging from 0.1 to 0.8,before and after strengthened with the reinforced mortar layers of which the reinforcement ratio ranges from 0.0% to 0.5% and the strength grade of the mortar ranges from M5to M15,was analyzed.Based on the analysis results,the calculation method for the shear capacity of brick masonry walls with the influence of aspect ratio and axial compression ratio was proposed,and the calculation method for the shear capacity of brick masonry walls strengthened with reinforced mortar layers was put forward,considering the influence of aspect ratio,axial compression ratio of the original brick wall,reinforcement ratio of the layers as well as the strength of the mortar used for the layers.
In the existing calculation methods,the shear capacity of brick masonry walls strengthened with reinforced mortar layers was calculated without considering the influence of aspect ratio and axial compression ratio and the impact of the aspect ratio was also not considered in the method of calculating shear strength of brick masonry walls before strengthening.The shear capacity of brick masonry walls with aspect ratio ranging from 0.4 to 2.5 and axial compression ratio ranging from 0.1 to 0.8,before and after strengthened with the reinforced mortar layers of which the reinforcement ratio ranges from 0.0% to 0.5% and the strength grade of the mortar ranges from M5to M15,was analyzed.Based on the analysis results,the calculation method for the shear capacity of brick masonry walls with the influence of aspect ratio and axial compression ratio was proposed,and the calculation method for the shear capacity of brick masonry walls strengthened with reinforced mortar layers was put forward,considering the influence of aspect ratio,axial compression ratio of the original brick wall,reinforcement ratio of the layers as well as the strength of the mortar used for the layers.
引文
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[3]娄永林.夹板墙的试验研究与加固设计[J].建筑结构学报,1988,9(4):1-12.
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[5]廖书堂.夹板墙钢筋布置探讨[J].四川建筑科学研究,1980,4:63-70.
[6]门楷.钢筋网水泥砂浆加固砖墙体抗震强度计算方法的探讨[J].青岛建筑工程学院学报,1986,2:9-13.
[7]Lourenco P B.Computational strategies for masonrystructures[M].Netherlands:Delft University Press,1996.
[8]朱伯龙.砌体结构设计原理[M].上海:同济大学出版社,1998.
[9]刘桂秋,施楚贤,刘一彪.砌体及砌体材料弹性模量取值的研究[J].湖南大学学报:自然科学版,2008,35(4):29-32.
[10]单荣民,唐岱新.双向受压砖砌体强度的试验研究[J].哈尔滨建筑工程学院学报,1988,21(2):39-46.
[11]庄茁,张帆,岺松.ABAQUS非线性有限元分析与实例[M].北京:科学出版社,2005.
[12]骆万康,朱希诚,廖春盛.砌体剪压复合受力相关性与抗剪摩擦系数的取值[J].工程力学,1997(S):249-255.
[2]朱伯龙,吴明舜,蒋志贤.砖墙用钢筋网水泥砂浆面层加固的抗震能力研究[J].地震工程与工程振动,1984,4(1):70-81.
[3]娄永林.夹板墙的试验研究与加固设计[J].建筑结构学报,1988,9(4):1-12.
[4]黄忠邦.水泥砂浆及钢筋网水泥砂浆面层加固砖砌体试验[J].天津大学学报,1994,27(6):764-770.
[5]廖书堂.夹板墙钢筋布置探讨[J].四川建筑科学研究,1980,4:63-70.
[6]门楷.钢筋网水泥砂浆加固砖墙体抗震强度计算方法的探讨[J].青岛建筑工程学院学报,1986,2:9-13.
[7]Lourenco P B.Computational strategies for masonrystructures[M].Netherlands:Delft University Press,1996.
[8]朱伯龙.砌体结构设计原理[M].上海:同济大学出版社,1998.
[9]刘桂秋,施楚贤,刘一彪.砌体及砌体材料弹性模量取值的研究[J].湖南大学学报:自然科学版,2008,35(4):29-32.
[10]单荣民,唐岱新.双向受压砖砌体强度的试验研究[J].哈尔滨建筑工程学院学报,1988,21(2):39-46.
[11]庄茁,张帆,岺松.ABAQUS非线性有限元分析与实例[M].北京:科学出版社,2005.
[12]骆万康,朱希诚,廖春盛.砌体剪压复合受力相关性与抗剪摩擦系数的取值[J].工程力学,1997(S):249-255.
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