约束条件对钢筋混凝土平板冲切承载力的影响

Influence of Constraints on the Bearing Capacity of Reinforced Concrete Slabs

本文在实验的基础上建立不同约束条件的钢筋混凝土平板数值模拟试件,通过研究不同约束条件下钢筋混凝土平板的极限承载力及破坏形式,发现约束条件对钢筋混凝土极限承载力及破坏形式影响显著。简支及固支约束条件与支撑约束条件相比可大幅提升钢筋混凝土平板的极限承载力。对破坏形式的影响,发现约束条件越多试件的破坏形式越接近脆性破坏,当约束达到一定数量后再增加约束,试件的极限承载力及破坏形式的影响不再明显。

In this paper,on the basis of experiments,numerical simulation specimens of reinforced concrete slabs with different constraints are established.By studying the ultimate bearing capacity and failure forms of reinforced con-crete slabs under different constraints,we find that the constraints have significant effects on the ultimate bearing capac-ity and failure modes of reinforced concrete.The simply supported and fixed constraints can greatly improve the ultimate bearing capacity of reinforced concrete slabs compared with the supported constraints.On the influence of failure mode,when the constraint conditions are more,the failure mode of the specimen is closer to brittle failure.