灌孔混凝土砌块砌体受压力学模型及其弹性模量  

MECHANICAL MODEL AND ELASTIC MODULUS OF GROUTED CONCRETE BLOCK MASONRY IN COMPRESSION

作　　者：梁建国[1] 龙腾[1] 

机构地区：[1]长沙理工大学土木与建筑学院,长沙410004

出　　处：《工程力学》2012年第7期228-234,共7页Engineering Mechanics

摘　　要：灌孔混凝土砌块砌体是由砌体和灌孔混凝土两部分组合而成,为了得到竖向压力作用下两种材料的相互作用机理,该文基于最小势能原理推导了砌体对灌孔混凝土的套箍系数以及灌孔混凝土砌块砌体内的应力分布,得到了灌孔混凝土砌块砌体的弹性模量可近似按材料力学组合截面公式进行计算,其计算结果与收集的全国65组281个试件试验结果符合良好,并通过试验结果统计得到了灌孔混凝土砌块砌体弹性模量的建议公式。理论分析和试验结果表明,我国现行规范中灌孔混凝土砌块砌体弹性模量取值偏低,将使配筋砌块砌体结构的设计计算结果偏于不安全。In order to obtain the interaction mechanism between the grout and masonry in grouted concrete block masonry structures under vertical load, the hooping factor which denotes the hooping action of the masonry to the grouted concrete and the stress distribution in the grouted concrete block masonry is studied based on the minimum potential energy principle. The elastic modulus of grouted concrete block masonry can be approximately calculated according to the assembled section formula in material mechanics, and the calculation results of this formula agree well with the test results of 281 specimens in 65 groups. Another proposed formula to calculate the elastic modulus of the grouted concrete block is derived base on the test results by regression analysis method. Theoretical analysis and test results show that the value of elastic modulus of grouted concrete block masonry in our current code is low, indicating it is unsafe to guide the design of reinforced concrete block masonry structures.

关 键 词：灌孔混凝土 混凝土砌块 砌体 应力分析 弹性模量 最小势能原理 

分 类 号：TU362[建筑科学—结构工程]