This paper deals with the structural performance of composite reinforced concrete beams made of two different concretes, bonded together using epoxy resin. The fabricated beam section consists of low-strength reinforced concrete core and relatively large thickness outer skin concrete jacket without reinforcement. The results confirm that the bonding technique used for constructing the composite section is effective. Flexural strength of the tested beam is mainly governed by the outer jacket thickness followed by the compressive strength of concrete. A simple flexural analytical model was developed to calculate moment capacity of composite sections. The predictions were found accurate and can be utilized for the flexural analysis and design of composite reinforced concrete beams. A parametric study was made to investigate the effects of core reinforcement and both composite section geometry and material properties on the depth of compression zone and moment capacity of the section.

中文翻译：

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复合混凝土-环氧-钢筋混凝土梁的抗弯性能

本文研究了由两种不同的混凝土制成的复合钢筋混凝土梁的结构性能，并使用环氧树脂粘合在一起。装配式梁段由低强度钢筋混凝土芯和相对较大厚度的无钢筋外皮混凝土护套组成。结果证实，用于构建复合截面的粘合技术是有效的。测试梁的抗弯强度主要受外护套厚度控制，其次是混凝土的抗压强度。开发了一个简单的弯曲分析模型来计算复合截面的弯矩承载力。预测结果准确，可用于复合钢筋混凝土梁的弯曲分析和设计。