摘要
为研究钢框架十字型刚性节点构件的滞回性能,以轴压比、H型钢柱腹板厚度、钢梁截面形式及加劲肋为参数,设计8组钢框架十字型刚性节点和1组T型刚性节点;基于简化的力学模型和材料的本构关系,利用ABAQUS软件建立有限元模型,分析节点试件的滞回性能;通过与已有的T型刚性节点试验结果对比,两者吻合较好,验证有限元模型的合理性.开展十字型节点仿真分析,提取节点荷载—位移滞回曲线、包络图、骨架曲线和应力云图,获得柱轴压比、H型钢柱腹板厚度、钢梁截面形式及加劲肋对该类节点抗震性能的影响规律,并对轴压比、柱腹板与翼缘厚度比提出设计建议.结果表明:柱轴压比设计限值建议取为0.5,柱腹板与翼缘厚度比设计限值建议取为0.75.当截面形式为H型钢时,十字型刚性节点的抗震性能良好,并且优于截面形式为钢管的,节点域设置横向加劲肋可有效提高节点的抗震性能.
In order to study the cross-type rigid steel frame node hysteretic behavior of components,the axial compression ratio,H type steel column web thickness,girder section and stiffener as design parameters,8 steel frame cross-type rigid joints and a T-type rigid joint are designed.Based on simplified mechanical model and constitutive relations of material,using ABAQUS software the corresponding finite element model is established and the hysteretic performance analysis is carried out.Through comparison between given T-type node test results and analysis results,both are in good agreement,thus the rationality of the finite element model established in this paper is verified.Simulation analysis of cross-type node is developed in further,load-displacement hysteretic curve of nodes,skeleton curve,envelope figure and the stress nephogram are extracted and comparative analysis is conducted.Influence regularity of column axial compression ratio,H-shaped steel column web thickness,different section forms of beam and the stiffening rib on the seismic behavior of the joints is obtained.The corresponding design suggestion for the axial compression ratio and column web and flange thickness ratio is proposed, design limit value of axial compression ratio of column should be taken as 0.5 and limit value of column web and flange thickness ratio is taken as 0.75.When the sectional form is for H-type steel,the cross-type rigid nodes have good seismic performance and better than the Tubular sectional form and transverse stiffeners at node can improve the seismic behavior of the joints effectively.
出处
《东北石油大学学报》
CAS
北大核心
2014年第1期102-111,8,共10页
Journal of Northeast Petroleum University
基金
教育部高等学校博士学科点专项科研基金项目(新教师类:20122322120004)
黑龙江省自然科学基金面上项目(E201336)
国家自然科学基金项目(51178087)
关键词
十字型刚性节点
滞回性能
有限元分析
T型节点
抗震性能
横向加劲肋
抗震设计
cross-type rigid connections
hysteretic behavior
finite element analysis
T-shaped node
seismic performance
transverse stiffeners
seismic design
