承重型横孔连锁混凝土砌块砌体的抗剪性能  

Shear Behavior of Load-bearing Horizontal-hole Interlock Concrete Block Masonry

作　　者：张敬书[1,2] 郭航 王政[2,3] 刘乐 赵俊[2,5] ZHANG Jingshu;GUO Hang;WANG Zheng;LIU Le;ZHAO Jun(Key Laboratory of Mechanics on Disaster and Environment in Western China(Lanzhou University)of the Ministry of Education,Lanzhou 730000,China;College of Civil Engineering and Mechanics,Lanzhou University,Lanzhou 730000,China;College of Civil Engineering,Central South University,Changsha 410075,China;Tianjin Tianhua North Architectural Design Co Ltd,Tianjin 300000,China;Ruijie Engineering Consulitng Co Ltd,Shenzhen 518129,China)

机构地区：[1]西部灾害与环境力学教育部重点实验室(兰州大学),甘肃兰州730000 [2]兰州大学土木工程与力学学院,甘肃兰州730000 [3]中南大学土木工程学院,湖南长沙410075 [4]天津天华北方建筑设计有限公司,天津300000 [5]深圳瑞捷工程咨询股份有限公司,广东深圳518129

出　　处：《湖南大学学报（自然科学版）》2020年第7期102-108,共7页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金资助项目(51678283)。

摘　　要：为研究承重型横孔连锁混凝土砌块砌体的抗剪性能,采用3种块型的砌块制作了砌体抗剪试件.每种块型的砌块试件均以3种砂浆强度为变量.首先对试件进行了静力剪切加载试验,观察试验现象,记录剪切破坏荷载.然后分析了影响砌体抗剪强度的主要因素,并和其他混凝土砌块砌体抗剪强度的试验结果以及规范计算值进行了对比.最后提出了考虑有效黏结面积计算混凝土砌块砌体抗剪强度的方法.研究结果表明:承重型横孔连锁混凝土砌块砌体的剪切破坏均为砂浆与混凝土砌块接触面的黏结剪切破坏.计算砌体抗剪强度时,应采用砂浆与砌块接触面的有效黏结面积;在此基础上,提出了承重型横孔连锁混凝土砌块砌体抗剪强度的计算方法,该方法不但可以准确计算该砌块砌体的抗剪强度,而且可以计算其他类型混凝土砌块砌体基于黏结剪切破坏的抗剪强度.To investigate the shear behavior of Load-bearing Horizontal-hole Interlock Concrete Block(LB-HHICB),three kinds of blocks were used to fabricate the shearing specimens and each took three mortar strengths as variables.At first,a static shear loading test was carried out to investigate the failure profiles and shear failure loads of the specimens.Then,the main factors affecting the shear strength of the masonry were analyzed and compared with other similar test results and specification values.Finally,a method was proposed to calculate the shear strength of LB-HHICHB considering the effective bonding area.The study showed that the shear failure of LB-HHICB was mainly bond failure of the interface between mortar and concrete block.When calculating the shear strength of masonry,the effective bonding area between mortar and concrete block was employed.Based on it,the calculation method on shear strength of LB-HHICB was put forward.This calculation method can not only accurately calculate the shear strength of this kind of block but also calculate the other types of concrete block based on the shear bond failure.

关 键 词：承重型横孔连锁混凝土砌块 抗剪试验 黏结破坏 抗剪强度 有效黏结面积 

分 类 号：TU311.4[建筑科学—结构工程] TU317.1