水平荷载作用下钢板深梁弹性屈曲分析  

Elastic Buckling Analysis on Deep Steel Plate Girders Subjected to Horizontal Loading

作　　者：江力强 郑宏[2] 赵鹏[2] 卫磊[2] 

机构地区：[1]东南大学土木工程学院,南京210096 [2]长安大学建筑工程学院,西安710061

出　　处：《建筑钢结构进展》2015年第2期1-6,19,共7页Progress in Steel Building Structures

基　　金：国家自然科学基金(50678025);中央高校基本科研业务费专项资金(CHD2012TD012)

摘　　要：运用Ritz能量变分法推导出钢板深梁在水平荷载作用下的临界荷载计算公式。应用有限元软件ANSYS分析了钢板深梁的弹性屈曲机理,提出了3类典型屈曲模式,得到了钢板深梁在各类屈曲模式下的跨高比阈值。对跨高比为2.0的钢板深梁填充钢框架体系进行了试验研究。将得到的结果进行对比分析,结论如下：有限元所得第1类屈曲模态与试验屈曲模态一致;试验所得临界荷载与理论解误差为7.8%~20.4%;理论结果与有限元所得第1类屈曲临界荷载接近,验证了理论解的正确性。所得结果可为此类构件的设计和应用提供理论基础。This paper presents a study on the critical buckling load for deep steel plate girders subjected to horizontal loading utilizing Ritz variation method.Buckling mechanism of deep steel plate girders is studied using finite element analysis software ANSYS.Three typical buckling modes are presented.The threshold values of span-depth ratio are also obtained for different types of buckling modes.In addition,an experimental study on a steel frame with deep steel plate girder of span-depth ratio 2.0is carried out.The first buckling mode from finite element analysis has a good agreement with the buckling mode in the test.The errors of critical buckling load between experimental and theoretical results range from 7.8% to 20.4%.The theoretical result is close to the first buckling mode capacity obtained by finite element analysis.Thus the validity of theoretical solution is established.The studies presented in this paper may provide a helpful reference for the design and application of deep steel plate girders.

关 键 词：钢板深梁 变分法 有限元分析 弹性屈曲 试验研究 

分 类 号：TU393.2[建筑科学—结构工程] TU339