钢筋钢丝网砂浆加固砖砌薄墙的抗弯性能
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摘要
目前,60 mm厚的砖砌薄墙已广泛应用于各类建筑。作为隔断墙,可以节省空间,然而施工中几乎不做拉结等处理,使得其安全性(如地震作用下的倒塌)令人担忧。为提高砖隔墙的安全性,又不较大增加其截面尺寸,提出用钢筋钢丝网砂浆加固砖砌薄墙抗弯性能的思路。共制作了9片砖墙进行对比试验研究,分析了加固墙体的开裂荷载和极限承载力,观察墙体破坏特征。试验研究结果表明,钢筋钢丝网砂浆能有效地约束加固层砂浆及砖墙,显著提高砖墙抗弯承载力,砂浆和砖块不发生大块剥落;还提出了钢筋钢丝网砂浆加固砖砌薄墙的抗弯承载力计算公式。
At present,60 mm thick brick wall has been widely used in all kinds of buildings. It can save space as a partition wall. However,there is almost no tension or other treatments,it is really worrying about its safety( such as the collapse under the earthquake). In order to improve the safety of brick partition wall and almost no increase its section size,the idea of strengthening the bending resistance of brick thin wall with reinforced steel wire mesh mortar was put forward. A total of 9 pieces of masonry walls were made for comparative experimental study,and the cracking load and ultimate bearing capacity of the reinforced walls were analyzed,and the failure characteristics of the walls were observed. The experimental results show that the reinforced layer mortar and bricks can be effectively restrained,and the calculation formula of flexural capacity of steel bar and wire mesh mortar reinforced brick thin wall is presented.
At present,60 mm thick brick wall has been widely used in all kinds of buildings. It can save space as a partition wall. However,there is almost no tension or other treatments,it is really worrying about its safety( such as the collapse under the earthquake). In order to improve the safety of brick partition wall and almost no increase its section size,the idea of strengthening the bending resistance of brick thin wall with reinforced steel wire mesh mortar was put forward. A total of 9 pieces of masonry walls were made for comparative experimental study,and the cracking load and ultimate bearing capacity of the reinforced walls were analyzed,and the failure characteristics of the walls were observed. The experimental results show that the reinforced layer mortar and bricks can be effectively restrained,and the calculation formula of flexural capacity of steel bar and wire mesh mortar reinforced brick thin wall is presented.
引文
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9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,2003:90-92,175-178,335-337Guo Zhenhai,Shi Xudong.Principle and analysis of reinforced concrete[M].Beijing:Tsinghua University Press,2003:90-92,175-178,335-337
2邓明科,杨铄,梁兴文.高延性混凝土单面加固构造柱约束砖砌体墙抗震性能试验研究[J].土木工程学报,2018,51(4):10-19Deng Mingke,Yang Shuo,Liang Xingwen.Experimental studies on seismic behavior of confined masonry walls strengthened with single HDC layer[J].China Civil Engineering Journal,2018,51(4):10-19
3纪晓东,马琦峰,赵作周,等.北京市既有农村住宅砖木结构加固前后振动台试验研究[J].建筑结构学报,2012,33(11):53-61Ji Xiaodong,Ma Qifeng,Zhao Zuozhou,et al.Shaking table test of unretrofitted and retrofitted brick-wood structures representative of existing rural buildings in Beijing[J].Journal of Building Structures,2012,33(11):53-61
4 Azzawi M A,Hopkins P,Ross J,et al.Carbon fiber-reinforced polymer concrete masonry unit bond after 20 years of outdoor exposure[J].ACI Structural Journal,2018,115(4):971-982
5张斯,徐礼华,杨冬民,等.纤维布加固砖砌体墙平面内受力性能有限元模型[J].工程力学,2015,32(12):233-242Zhang Si,Xu Lihua,Yang Dongmin,et al.Finite element modelling of FRP-reinforced masonry walls under in-plane loadings[J].Engineering Mechanics,2015,32(12):233-242
6张祥顺,谷倩,彭少民.CFRP对砖墙抗震加固对比试验研究与计算分析[J].世界地震工程,2003,19(1):77-82Zhang Xiangshun,Gu Qian,Peng Shaomin.Comparative experimental study of masonry walls strengthened by CFRP and computation model analysis[J].World Earthquake Engineering,2003,19(1):77-82
7苏三庆,丰定国,王清敏.用钢筋网水泥砂浆抹面加固砖墙的抗震性能试验研究[J].西安建筑科技大学学报,1998,30(3):26-30Su Shanqing,Feng Dingguo,Wang Qingmin.An investigation on aseismic behavior of masonry wall strengthened with steel-meshed cement mortar[J].Journal of Xi'an University of Architectural Science and Technology,1998,30(3):26-30
8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):36-40Wang Yayong,Yao Qiulai,Wang Zhonghai,et al.Test on brick walls strengthened by composite cover of high strength wire cable mesh and polymeric mortar[J].Building Structure,2005,35(8):36-40
9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,2003:90-92,175-178,335-337Guo Zhenhai,Shi Xudong.Principle and analysis of reinforced concrete[M].Beijing:Tsinghua University Press,2003:90-92,175-178,335-337