摘要
结合工程实际,应用有限元软件MIDAS/CIVIL分别建立杆系有限元模型和空间实体模型,对大悬臂、多腹板、宽箱室变截面箱梁在对称荷载作用下的剪力滞效应、偏载作用下的腹板受力不均匀效应进行分析。结果表明,截面上下翼缘剪力滞效应较为显著,按规范提供的有效翼缘宽度折减计算不能完全包络剪力滞效应的影响;同时,箱梁的偏载效应从跨中至支点方向逐渐增大。
Based on practical engineering,stick-system finite model and solid model were established respectively by finite element software MIDAS CIVIL in order to carry on the analysis of shear lag effect under asymmetrical loading and non-uniform load under partial load of tapered box girder with long cantilever,multi web and wide box.The result of calculation indicates that the section upper and lower shear lag effect is significant and formulas for effective flange width according to code cannot overcasts the shear lag effect completely.Meanwhile the offset load effect of box girder increases gradually from mid-span to supports.
出处
《交通科技》
2012年第2期1-3,共3页
Transportation Science & Technology
关键词
大悬臂
多腹板
宽箱梁
剪力滞
偏载
long cantilever
multi web
wide box
shear lag
offset load
