摘要
Abstract
The opening beam can effectively reduce the structural height and self-weight,but the existence of holes has a certain impact on the mechanical performance of the beam.Based on the plastic damage finite element model,this article analyzes the effects of different opening parameters such as shape,aperture,horizontal and vertical positions on the ultimate bearing capacity,deformation and ductility of reactive powder concrete(RPC)opening beams.The results show that when the opening area is the same,there is not much difference in the mechanical performance between RPC opening beams with different opening shapes.The ultimate bearing capacity and ductility of the opening beam decrease with the increase of the aperture,while the deformation increases with the increase of the aperture.When the hole is located in the bending-shear zone,the ultimate bearing capacity and ductility of the opening beam are significantly reduced compared to opening beams within the pure bending zone.The influence of holes biased towards the compressed zone of concrete on the ultimate bearing capacity,deformation,and ductility of the open-hole beam is very significant.Based on the mechanical performance of opening beams,corresponding design suggestions for the arrangement of holes in RPC beams are proposed.关键词
活性粉末混凝土/开孔梁/孔洞参数/受力性能/数值模拟Key words
reactive powder concrete/opening beam/opening parameters/mechanical performance/numerical simulation分类
建筑与水利
