取代率和混凝土强度对组合梁受弯性能的影响

Influence of replacement ratio and recycled concrete strength on bending capacity of combination beam

为了研究再生骨料取代率和再生混凝土强度对组合梁单调荷载作用下受弯性能的影响,基于有限元模拟软件ABAQUS对型钢-再生混凝土组合梁受弯性能进行了模拟研究.结果表明,随着再生混凝土强度等级的提高,组合梁的承载力提高,交接面滑移降低.随着再生骨料取代率的提高,组合梁的极限荷载呈下降趋势.取代率在50%以下时,随着取代率的增加,交接面滑移量降低.取代率提高到70%时,交接面滑移出现回升趋势.型钢-再生混凝土组合梁具有较好的受弯性能.

In order to study the effet of the replacement ratio of recycled aggregates and the strength of recycled concrete on the bending capacity of combination beam,the simulation study on the steel-recycled concrete bending capacity of combination beam was carried out with the finite element simulation software ABAQUS. The results showthat with increasing the strength grade of recycled concrete,the bearing capacity of combination beam increases,and the interface slip reduces. With increasing the replacement ratio of recycled aggregates,the ultimate load of combination beam exhibits a downtrend. When the replacement ratio is below50%,the interface slip decreases with increasing the replacement ratio. When the replacement ratio increases to 70%,the interface slip exhibits an upward trend. The steel-recycled concrete combination beam has good mechanical performance.