Experimental investigation and simulation of the effect of flange width on failure mechanism of beam-column subassemblies with fiber-reinforced concrete for the expected damaged parts
Lu Tingting Liang Xingwen Hu Aoxiang Deng Mingke Zhang Zheng
Abstract：To study the effect of the flange width and the fiber-reinforced concrete (FRC) on the failure mechanism of frame structure, quasi-static reversed cyclic loading tests were carried out on five 1/2 scale beam-column subassemblages. For these subassemblies, the flange width for each side of the beam was 8 times or 6 times the slab thickness, the column-to-beam flexural bearing ratio was 1.2 and 1.4, respectively, and FRC was used in the expected damaged parts. The quasi-static tests were used for investigating the failure procedure and the failure mode analyzing the failure mechanism, the strain distribution of reinforcement in flange slab, and studying their seismic behaviors such as deformation, energy dissipation, degradation of strength and stiffness. Furthermore, numerical simulations were conducted on the prototype (full-scale). It is found that the failure mechanism of “strong column-weak beam” can be readily achieved, because the FRC used for the expected damaged parts can reduce the impact of slab on the flexural strength of longitudinal beam. Particularly, the beam-column subassemblies with the flange width (8 times the slab thickness) for each side of beam shall be easier to achieve the mechanism of “strong column-weak beam”, so that the coefficient of strength degradation can be reduced remarkably and the energy dissipation capacity can be improved greatly.
陆婷婷 梁兴文 胡翱翔 邓明科 张正. 翼缘宽度对预期损伤部位采用FRC增强的梁柱组合件破坏机制影响的试验研究及数值模拟[J]. 土木工程学报, 2016, 49(12): 52-64.
Lu Tingting Liang Xingwen Hu Aoxiang Deng Mingke Zhang Zheng. Experimental investigation and simulation of the effect of flange width on failure mechanism of beam-column subassemblies with fiber-reinforced concrete for the expected damaged parts. 土木工程学报, 2016, 49(12): 52-64.
