摘要
提出一种能同时考虑拉压、弯曲、扭转、扭转翘曲、畸变、剪滞效应及它们之间交互作用的每节点有１４ 个自由度的薄壁曲线箱梁空间分析单元，并直接从流动的圆柱极坐标系下一点处的位移－应变－应力关系出发，结合 薄壁曲线箱梁理论和有限元技术，推导出该单元的刚度矩阵。通过模型试验［１５］［４］验证了本文方法的正确性。
A new finite element for thin-walled curved for girder analysis is proposed in the paper. Each node of the element includes eight extra degree-of-freedoms over the normal sir degree-of freedoms. It includes the warping, the distortion, and the shear-lag effects as well as the interactions among them. The thin-walled beam theory is combined with the finite elementtechnique to provide a formulation of the element stiffness matrices under convected cylinder coordinates. The numerical results show that the proposed method is feasible and reliable. The proposed element is one-dimensional. It is suitable to analyze a curved box girder bridge with variable cross-sections, arbitrary support conditions, and subjected to various loads.
出处
《土木工程学报》
EI
CSCD
北大核心
2000年第6期81-87,共7页
China Civil Engineering Journal
基金
湖南省自然科学基金!(97JJY2063)
关键词
曲线箱梁
剪滞效应
箱梁桥
有限元法
畸变
curved box girder, shear-lag effect, convected cylinder co-ordinates, finite element method, distortih
