钢框架带悬臂梁段拼接节点抗震性能参数分析  

Parametric Study of the Aseismic Capacity of a Steel Frame Cantilever Beam Spliced Joint

作　　者：常鸿飞[1,2] 夏军武[1,2] 孙冬明[2] 

机构地区：[1]中国矿业大学深部岩土与地下工程国家重点实验室,江苏徐州221008 [2]中国矿业大学力学与建筑工程学院,江苏徐州221116

出　　处：《中国矿业大学学报》2010年第5期665-670,共6页Journal of China University of Mining & Technology

基　　金：国家自然科学基金项目(50774081);“十一五”国家科技支撑计划重大项目(2006BAJ14B07,2006BAJ05A08);教育部新世纪人才支持计划(NCET-07-0804);江苏省普通高校研究生科技创新计划;江苏省土木工程研究生科技创新基金;中国矿业大学青年科研基金

摘　　要：利用有限单元方法,考虑材料的非线性,分别对拼接等强型和拼接削弱型带悬臂梁段拼接节点进行分析,考察螺栓预拉力、界面摩擦因数、悬臂段长度、螺栓孔形状、梁端构造措施等因素对2类节点抗震性能的影响.结果表明,拼接等强型节点的抗震性能对上述设计参数几乎没有依赖性,而拼接削弱型节点的抗震性能则显著依赖于各参数的改变.将预拉力由P增大为1.2P或将摩擦因数由0.3增大为0.5均造成节点塑性转动能力降低50%以上;将悬臂梁段长度由500mm减为300mm造成滑移荷载降低20.5%,增为800mm则造成螺栓不出现滑移;梁端构造加强引起节点承载力提高16.8%,塑性转角提高17.5%.因此,高强螺栓预拉力、界面摩擦因数、梁端构造措施是影响拼接削弱型节点抗震性能的关键参数,在设计中需重点关注.A finite element method was used preform non-linear analysis of equal-strength and weak-strength steel frame cantilever beam spliced joints.Bolt pre-tension,friction coefficient at the interface,cantilever beam length,bolt-hole shape and reinforcement of the column-beam connection are examined.It appears that these parameters have a small influence on the capacity of the equal strength splice joint to dissipate energy.On the other hand,the weak splice joint is greatly affected by changes in these parameters.For example,rotation at the joint decreases more than 50% when pre-tension increased 20% or when the coefficient of friction increased from 0.3 to 0.5.The strength increases 16.8% and the resistance to rotation 17.5% when the column-beam connection is reinforced.When designing weak strength joints these parameters are key to creating a successful design.

关 键 词：带悬臂梁段拼接节点 抗震性能 参数分析 有限元 

分 类 号：TU392[建筑科学—结构工程]