摘要
铁路斜交框架立交桥是铁路跨越公路时采用的一种桥梁形式,然而由于斜桥计算尚未形成完整的理论体系,这给铁路斜交框架立交桥的设计与施工带来很大的困难,实际当中与正交桥相比,此类桥梁更容易出现顶板开裂问题。以一座实桥为例,利用有限元方法进行分析,结合工程实践对裂纹产生原因进行了分析。并根据铁路斜交框架桥空间受力特点,提出了一些建议,供实际工程参考。
The railway skew frame bridge is an usual bridge type used for railway line spanning highway. However, considerable difficulties with design and construction of skew frame bridges still exist at present because the complete theory for skew bridge calculation and analysis has not been formed. Compared with a normal bridge in the practical application, the problem of cracks in the skew frame bridge top slab will more easily occur. In this paper, by way of example of a bridge, the causes of cracks are analyzed by means of finite element method and in the light of construction conditions, and further, some proposals are made according to the three-(dimensional) structural behavior of the railway skew frame bridge, which are expected to serve as reference to the practical application.
出处
《桥梁建设》
EI
CSCD
北大核心
2004年第1期66-68,共3页
Bridge Construction
关键词
铁路桥
斜桥
框架桥
裂纹
有限元法
成因分析
railway bridge
skew bridge
frame bridge
crack
finite element method
analysis
