摘要
以重庆市建新西路立交工程主线桥预应力混凝土宽箱梁为例,分别建立梁格模型和单梁模型进行计算,对比分析宽箱梁的横向受力特点。计算结果表明:宽箱梁横向受力存在明显的不均匀现象;支座布置对宽箱梁在支点处的横向受力分配影响很大;宽箱梁边腹板受力大于其他腹板;单梁模型对宽箱梁支座竖向反力和腹板剪力值的计算结果偏小。
Taking a pre-stressed concrete wide box girder in the Jianxinxi Road crossing project in Chongqing as an example,its grillage model and single-beam model are established respectively for computation,and a comparative analysis on the transverse mechanics features of wide box girder is conducted.The results show that the transverse load of wide box girder is obviously uneven.The arrangement of abutments has a great influence on the transverse load distribution on wide box girder near the fulcrum;The loads on side webs are greater than those on other webs.The calculation results also show that there are underestimations of the vertical reaction force of supports and the web shear force of wide box girder in single-beam model.
作者
王煜
WANG Yu(Chongqing Design Institute Co.Ltd.,Chongqing 400015,China)
出处
《工程建设与设计》
2022年第5期3-6,共4页
Construction & Design for Engineering
关键词
宽箱梁
预应力混凝土
梁格模型
单梁模型
支座反力
剪力
wide box girder
pre-stressed concrete
grillage model
single-beam model
support reaction force
shear force
