Influence of reinforcement ratio to flexural behavior of coral aggregate reinforced concrete beam

被引：0
|
作者：
Da B. [1 ,2 ]
Yu H. [3 ]
Ma H. [3 ]
Chen D. [1 ,2 ]
Li S. [4 ]
Mi R. [5 ]
Wu Z. [3 ]
机构：
[1] College of Harbour, Coastal and Offshore Engineering, Hohai University, Nanjing
[2] Key Laboratory of Coastal Disaster and Defence of the Ministry of Education, Hohai University, Nanjing
[3] Department of Civil Engineering, Nanjing University of Aeronautic and Astronautic, Nanjing
[4] Nanjing Hydraulic Research Institute, Nanjing
[5] School of Materials Science and Engineering, Southeast University, Nanjing
来源：
Jianzhu Jiegou Xuebao/Journal of Building Structures | 2020年 / 41卷 / 06期
关键词：
Coral aggregate concrete; Flexural behavior; Reinforced concrete beam; Reinforcement ratio; Static test;
D O I：
10.14006/j.jzjgxb.2018.0399
中图分类号：
学科分类号：
摘要：
The bending tests toward coral aggregate reinforced concrete beams (CARCB) and ordinary aggregate reinforced concrete beams (OARCB) were carried out. The concrete types and reinforcement ratios were selected as parameters to study the deforming capacity and flexural capacity. The results show that the crack bending moment and ultimate bending moment gradually increase with the reinforcement ratio, and the extension of the crack width is gradually slowed down, indicating an effectively inhibited development of cracks. Furthermore, by increasing reinforcement ratio, the ratio of the crack bending moment and ultimate bending moment could be increased to delay the cracking of CARCB. With the increase of load, the crack width increases. At the beginning of the loading, the crack width increases slowly, and then increases rapidly when the load is approaching the ultimate load until the failure of beam. Meanwhile, by giving comprehensive consideration on the effects of steel corrosion on the loss of steel section and the decrease of steel yield strength, a calculation model for predicting ultimate bending moment, longitudinal tensile steel stress, average crack distance and average crack width of CARCB was proposed. © 2020, Editorial Office of Journal of Building Structures. All right reserved.
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页码：143 / 148
页数：5
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