【摘要】 通过钢纤维高强混凝土简支方板的冲切试验,得到冲切板的板面变形分布图及中心点荷载挠度曲线,认为板在冲切破坏之前发生的变形主要是弯曲变形。该变形反映了板在各个受力阶段的抗弯性能,也在很大程度上直接影响着冲切锥面上的应力分布和板的抗冲切能力。对冲切板在破坏前各受力阶段的挠度进行了计算,计算结果与实测曲线吻合良好。更多还原

【Abstract】 The deformation distribution and the load-deflection characteristic of high-strength steel fiber reinforced concrete square slab subjected to punching shear were obtained experimentally. It is assumed that the deformation of slab before punching shear failure is primarily caused by bending moment. The deformation not only reflects the flexure behavior of slab at every loading stage, but also affects the stress status on the surface of punching shear cone and the ultimate capacity of the slab. In this paper, the deformations of punching shear slabs at three loading stages before failure are calculated. Good agreement between the theoretical values and the testing curves is reached.更多还原