混凝土强度对空心板抗剪性能的影响

The impact of concrete strength on shear capability for hollow slab

依托某高速公路改扩建工程中废弃的16 m先张法预应力钢筋混凝土空心板梁进行抗剪破坏性试验,利用有限元软件ANSYS进行数值模拟,将有限元计算结果与试验结果进行比对,证明有限元模型的正确性,利用有限元模型进行了混凝土强度对空心板抗剪性能影响的数值模拟分析,得到了分析结果:在相同剪跨比时,空心板抗剪性能随混凝土强度的增大而增大;混凝土强度对斜拉破坏、剪压破坏、斜压破坏的影响程度依次变大。

The shear failure test of 16 m pre-tensioned prestressed concrete hollow slab beam in a highway reconstruction project was carried out. Subsequently, the numerical simulation was performed using the finite element software ANSYS. The results calculated by the finite element method were compared with the experimental results, the correctness of the finite element model was proved. The numerical simulation analysis of the effect of concrete strength on the shear behavior of hollow slab is carried out by using the finite element model and the analysis results are obtained ： at the same shear span ratio, the shear capability of the hollow slab increased with the increase of the strength of concrete, the influ-ence of concrete strength on the tensile failure, the shear pressure failure and the oblique compressive failure was increased according to priority.