非标准钢筋混凝土三点弯曲梁双K断裂特性

发布时间：2019-03-26 10:35

【摘要】：以双K断裂理论为基础,基于标准钢筋混凝土三点弯曲梁断裂特性,推导了非标准钢筋混凝土三点弯曲梁断裂参数计算公式.开展了非标准钢筋混凝土三点弯曲梁试件断裂试验,研究了其断裂参数的变化规律.结果表明:试件荷载值随试件高度的增加而增大;而试件的亚临界扩展相对值、断裂韧度、起裂断裂韧度和失稳断裂韧度均不随试件高度的增加而变化,可认为是常数.
[Abstract]:Based on the double-K fracture theory and based on the fracture characteristics of standard reinforced concrete three-point bending beam, the formula for calculating the fracture parameters of non-standard reinforced concrete three-point bending beam is derived. The fracture test of non-standard reinforced concrete three-point bending beam is carried out, and the variation of fracture parameters is studied. The results show that the load value of the specimen increases with the increase of the specimen height, while the subcritical propagation relative value, the fracture toughness, the initiation fracture toughness and the instability fracture toughness of the specimen do not change with the increase of the specimen height, which can be regarded as a constant.
【作者单位】：南京水利科学研究院;水文水资源与水利工程科学国家重点实验室;郑州大学水利与环境学院;
【基金】：国家自然科学基金资助项目(51325904,51279111,51309163,51409162) 江苏省自然科学基金资助项目(BK20140081) 中国博士后科学基金资助项目(2014M551624) 江苏省博士后科研资助计划项目(1302055B)
【分类号】：TU375.1

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