摘要
目的研究竖向灰缝处有无砂浆对砌体抗弯性能的影响,并对此类无砂浆砌体是否满足砌体结构规范要求进行论证.方法笔者分别以竖向灰缝处有无砂浆、竖向灰缝处砌块截面形式为参数,进行砌体沿齿缝截面的弯曲抗拉试验,对比分析各参数对砌体沿齿缝截面弯曲抗拉强度的影响.结果竖向灰缝处砌块截面形式为企口的竖向无砂浆砌体沿齿缝截面弯曲抗拉强度大于截面形式为平口的竖向无砂浆砌体,而竖向有砂浆的平口砌体沿齿缝截面弯曲抗拉强度均大于竖向无砂浆砌体;竖向有砂浆的平口砌体和竖向无砂浆的企口砌体沿齿缝截面的弯曲抗拉强度值均符合砌体规范要求,而竖向无砂浆平口砌体沿齿缝截面的弯曲抗拉强度值不符合砌体规范要求.结论在砌块块体之间几何互锁的基础上,能够实现砌体的无砂浆砌筑,为促进无砂浆砌体的推广提供了有效途径.并提出竖向灰缝处有无砂浆砌体沿齿缝截面弯曲抗拉强度平均值的建议计算公式.
This paper studies the influence of mortar on the bending resistance of masonry with and without vertical mortar joints,and demonstrates whether such mortar-free masonry meets the requirements of masonry structure specifications.The authors takes the presence or absence of mortar at the vertical mortar joint and the section form of the block at the vertical mortar joint as parameters respectively to carry out bending tensile tests of masonry along the section of the tooth joint,and compares and analyzes the influence of various parameters on the bending tensile strength of masonry along the section of the tooth joint.The bending tensile strength of the vertical mortar-free masonry with the section form of tongue-and-groove at the vertical mortar joint is greater than that of the vertical mortar-free masonry with the section form of flat joint,while the bending tensile strength of the vertical mortar-free masonry with the section form of flat joint is greater than that of the vertical mortar-free masonry.The bending tensile strength values of the vertical mortar flat masonry and the vertical mortar-free tongue-and-groove masonry along the section of the slot meet the masonry specification requirements,while the bending tensile strength values of the vertical mortar-free flat masonry along the section of the slot do not meet the masonry specification requirements.On the basis of geometric interlocking between block blocks,mortar-free masonry can be realized,which provides an effective way to promote the popularization of mortar-free masonry.Furthermore,a suggested formula for calculating the average bending tensile strength of masonry with and without mortar at the vertical mortar joint along the section of the tooth joint is proposed.
作者
徐春一
许纪峰
马莹莹
佟舟
XU Chunyi;XU Jifeng;MA Yingying;TONG Zhou(School of Civil Engineering,Shenyang Jianzhu University,Shenyang,China,110168;China Railway 16th Bureau Group Co.Ltd.,Beijing,China,100018;Department of Civil Engineering,Shenyang Urban Construction University,Shenyang,China,110167)
出处
《沈阳建筑大学学报（自然科学版）》
CAS
CSCD
北大核心
2020年第3期449-456,共8页
Journal of Shenyang Jianzhu University：Natural Science
基金
国家自然科学基金项目(51808353)
辽宁省教育厅服务地方项目(lnfw201905)
沈阳建筑大学科研创新培育计划项目(CXPY2017022)
沈阳市科技局高层次人才创新成果转化补助资金项目(RC190104)。
关键词
砌体结构
竖向灰缝
无砂浆
沿齿缝抗弯
蒸压加气混凝土砌块
masonry structure
vertical mortar joint
mortarless
bending resistance along the tooth seam
autoclaved aerated concrete block
作者简介
徐春一(1983-),女,副教授,博士,主要从事现代砌体结构及加固改造方面研究.
