地震工程学报Issue(2)：243-248,6.DOI:10.3969/j.issn.1000-0844.2014.02.0243
基于多点位移控制的梁柱节点刚度对钢框架抗震性能的影响
Effects of Beam-column Joint Stiffness on Seismic Behavior of SteelFrames Based on Multiple Point Constraints
摘要
Abstract
The behavior of beam-to-column connections with angles falls between fully rigid and i-deal pin connections and belongs to the category of semi-rigid connections.In this paper,a series of steel plan frames with different degrees of connection stiffness are established in ABAQUS by modeling the beam-to-column connections with the SPRING2 element and using different mo-ment-rotation curves as the node constraint.Using multiple point constraints,the lateral force dis-tribution is maintained and displacement-controlled pushover analysis is achieved.The model is verified by comparing the simulated curve with the experimental curve of the load displacement of a two-floor-span semi-rigid frame.Based on the verification,a six-floor-two-span plane frame is modeled with different joint stiffness influence factorsα.In the finite element analysis procedure,connective,geometric,and material nonlinearities are considered.The effect under differentα fac-tors on the seismic performance is discussed,such as frame bearing capacity,lateral stiffness,duc-tility,energy dissipation,and stiffness deterioration.Analytic results show that frame bearing ca-pacity,lateral stiffness,ductility,and energy dissipation increase gradually with the reduction of theαfactor,but the increase in amplitude slows down.The curve of stiffness degradation show that the degeneration of rigidity is obvious as the α factor reduces.In conclusion,when the joint stiffness influence factor α is between 1/15 and 1/20,the joint has higher bearing capacity and better ductility performance to meet the requirement of earthquake resistance.The above-men-tioned conclusion can serve as guidance for engineering.关键词
钢框架/多点位移控制/节点刚度影响系数/单向加载/循环加载/抗震性能Key words
steel frame/multiple point constraint/joint stiffness influence factor/uniaxial load/cyclic load/seismic performance分类
建筑与水利引用本文复制引用
洪敏,冯红卫,王凤,赵林林,高永国..基于多点位移控制的梁柱节点刚度对钢框架抗震性能的影响[J].地震工程学报,2014,(2):243-248,6.基金项目
地震科技发展基金 （）
