• 应用研究 •

### 混凝土圆形骨料周边应力集中系数的解析法

1. 1. 东莞理工学院建筑工程系, 广东 东莞 523808;
2. 哈尔滨工业大学土木工程学院, 哈尔滨 150090
• 收稿日期:2016-04-28 修回日期:2016-05-25 出版日期:2016-12-15 发布日期:2016-12-27
• 通讯作者: 于国友,教授,博士,从事结构力学研究.E-mail:yugy@dgut.edu.cn
• 基金资助:

广东省教育厅2014年本科高校教学质量与教学改革工程项目“土木工程实验教学示范中心”（粤教高函（2014）97号和粤教高函（2014）107号）和广东省教育厅2015年本科高校教学质量与教学改革工程项目“《混凝土房屋结构设计课程群》的建设与改革”（粤教高函（2015）173号）资助.

### ANALYTICAL SOLUTIONS FOR STRESS CONCENTRATION FACTOR AROUND CIRCULAR AGGREGATES IN CONCRETE

YU Guoyou1, PAN Yunfeng2

1. 1. Department of Civil Engineering, Dongguan University of Technology, Dongguan 523808, Guangdong, China;
2. School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China
• Received:2016-04-28 Revised:2016-05-25 Online:2016-12-15 Published:2016-12-27

Abstract:

The different mechanical properties in mortar and in aggregates may lead to stress concentrations in concrete. However, as the distribution of aggregates is very complicated, a numerical analysis of concrete on micromechanical scales will involve a large computation and the difficulty of element meshing. Therefore, analytical solutions for the stress concentration factor caused by the existence of aggregates are derived in this paper based on a 2D model. Then, together with the superposition method, analytical solutions are used for the stress analysis in concrete of homogeneous media to approximate the real case, which makes the problem much easier. Analytical results are compared with those obtained by the FEM method for concretes with one aggregate and four aggregates, respectively, which verifies the accuracy of the method given in this paper.

Key words:

concrete|circular aggregate|analytical solution|stress concentration|superposition method