双跨连续钢梁屈曲的能量变分解  

THE ENERGY VARIATIONAL SOLUTION FOR BUCKLING OF THE DOUBLE SPAN CONTINUOUS STEEL BEAM

作　　者：张文福[1] 任亚文[1] 刘迎春[1] 滕振超[1] 赵文艳[1] 计静[1] 

机构地区：[1]东北石油大学防灾减灾及防护工程省高校重点实验室,黑龙江大庆163318

出　　处：《低温建筑技术》2014年第5期41-44,共4页Low Temperature Architecture Technology

基　　金：黑龙江省教育厅重点项目(12511Z004)

摘　　要：建立了侧向弹性支撑双跨连续钢梁侧扭屈曲分析的能量变分模型,侧向位移和扭转角的模态函数采用6项三角级数表达,通过引入无量纲弯矩等参数,推导得到具有侧向弹性支撑双跨连续钢梁侧扭屈曲临界弯矩的能量变分解,并用ANSYS分析软件对本文解答进行了有限元验证。结果表明,本文的能量变分解具有较高的精度,可供同类钢梁的工程设计参考。An energy variational model for the lateral torsional bucking analysis of double span-continuous steel beam with lateral elastic supports was established. The modal function of the lateral displacement and torsion angle are expressed as triangle function with six terms. By introducing dimensionless parameters,the energy variational solution for the critical moment of the lateral torsional bucking of double span continuous steel beam with lateral elastic support is obtained. And the accuracy is further verified by ANSYS finite element analysis. This provides the referential basis for the same kind of steel beam.

关 键 词：连续钢梁 侧扭屈曲 弹性支撑 能量变分解 

分 类 号：TU391[建筑科学—结构工程]