关键词: 纤维混凝土;低周反复荷载;有限元;承载力;延性

Abstract: Seismic behavior of fiber reinforced concrete columns under low cycle loading were studied by finite element analysis software.The influence of fiber content on hysteretic curve, skeleton curve, bearing capacity and ductility was analyzed, which was also compared with the test values.The results show that the bearing capacity and seismic energy dissipation capacity can be improved by the adding fiber.On the one hand, the bearing capacity can be significantly enhanced by just adding steel fiber, but not obviously by adding polypropylene fiber at the same time, which showes a little contribution to the bearing capacity.On the other hand, the ductility, which is a little improved by adding polypropylene fiber and steel fiber, is observably improved by just adding steel fiber.Therefore, the polypropylene fiber plays a certain role in improving the bearing capacity of the component.The bearing capacity coefficient of the components at a rate of 1.5% of steel fiber volume content is the largest.

Key words: fiber reinforced concrete;low cyclic loading;finite element;bearing capacity;ductility