【作者】 王燕； 陈晓； 厉见芬；

【Author】 Wang Yan;Chen Xiao;Li Jianfen;Qingdao Technology University;Changzhou Institute of Technology;

【机构】 青岛理工大学； 常州工学院；

【摘要】 为对比分析梁端翼缘削弱型节点和腋板加强型节点的抗震性能,以普通节点作为参照,分别建立普通节点钢框架(NSF)、削弱节点钢框架(RBF)和腋板加强型节点(SHF)三种空间钢框架计算模型,运用ANSYS有限元软件分析了不同节点类型空间钢框架在地震作用下的抗震性能和工作机理差别。研究结果表明:三种梁柱节点空间框架顶点位移曲线形状相似,在相同地震波工况下,RBF框架顶点位移最小,NSF框架次之,SHF框架最大,三种梁柱节点框架柱底剪力规律与位移一致。与NSF框架相比,RBF和SHF空间框架梁端塑性区发展更加充分,梁铰耗能能力较强,实现了梁端塑性铰外移,可以有效降低节点区域梁端和柱翼缘应力状态,表现出良好的延性性能。RBF和SHF框架梁应力重分布改善了整体框架结构的耗能能力,符合"强柱弱梁"抗震设计目标。更多还原

【Abstract】 In order to comparatively analyze the seismic performance of reduced beam node and symmetric haunch node,ordinary beam-column node chosen as a reference,three space steel frames of ordinary node(NSF),reduced beam node(RBF)and symmetric haunch node(SHF)were established,ANSYS finite element software was applied to analyze the difference of seismic performance and working mechanism of three kinds of nodes.The results indicate that the rules of the vertex displacement curves of three frames are consistent,under the same working condition of seismic wave,the vertex displacement of RBF is smallest,NSF’s is bigger and SHF’s is biggest.The rule of three frames bottom shear is consistent with displacement.Compared with the NSF.the beam end plastic zone of RBF and SHF space frame develop more fully,these two frames can let plastic hinges away from beam end,the beam hinge’s energy dissipation ability is relatively strong,this can effectively reduce stress state of beam end and column flange and shows good ductility performance.The stress on the beam of RBF and SHF redistributes,this improves energy dissipation capacity of the integral frame structures and accords with the "strong column weak beam" seismic design objective.更多还原