高强钢材焊接工字形截面受压构件有限元分析  

FINITE ELEMENT ANALYSIS OF HIGH STRENGTH STEEL I-SECTION COLUMNS UNDER COMPRESSION

作　　者：姜学宜[1,2] 徐咏雷 施刚[3] 孙雅欣[1,2] 

机构地区：[1]中冶京诚工程技术有限公司,北京100073 [2]北京京诚华宇建筑设计研究院有限公司,北京100071 [3]土木工程安全与耐久教育部重点试验室,清华大学土木工程系,北京100084

出　　处：《钢结构》2014年第3期7-11,共5页Steel Construction

基　　金：北京市科委2013首都设计提升计划(Z131110000213038)资助项目

摘　　要：运用通用有限元软件ANSYS建立三维有限元模型,模拟两端铰接的高强钢材焊接工字形截面轴心受压与偏心受压的受力性能,并用国内外试验数据验证有限元模型的正确性。在有限元模型建立过程中,对不同强度等级(460,690,960MPa)的高强钢构件进行模拟,充分考虑多种非线性因素以保证模型的正确性。为了充分验证模型,对不同强度等级、构件长度、截面尺寸的构件进行有限元计算,将计算得到的极限承载力与试验结果对比。在此过程中,采用初弯曲等效模型与弯矩等效模型分别模拟轴心受压构件和偏心受压构件。结果表明:该有限元模型有足够的精度,可以较好地模拟实际构件受力性能。Finite element models （FEM） are developed by using the general-purpose finite element software ANSYS, simulating high strength steel columns with I-shaped section and proved to be accurate by using data from domestic and abroad experiments. Steel components of different strength （460,690,960 MPa） are simulated to ensure the models accuracy, during which process some kinds of nonlinear factors are fully considered. To prove the accuracy of the models, components with different strength, length, sectional dimensions are calculated by FEM, and the ultimate bearing capacities are compared with the results obtained from experiments. Two kinds of FEM are developed during the simulation： initial bending equivalent model and moment equivalent model. The results show that FEM is accurate enough to simulate the components.

关 键 词：高强钢材 有限元模型验证 轴心压力 偏心压力 初弯曲等效模型 弯矩等效模型 

分 类 号：TU391[建筑科学—结构工程]