...国土木工程学报 关键词：薄壁箱梁；曲线箱梁；剪滞效应；二次剪切变形；能量变分法 [gap=1552]Keywords: thin-walled box girder; curved box girder; shear lag effect; secondary shear deformation; energy varia..
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skew thin walled box girder 薄壁斜交箱梁
curved thin-walled box-girder 曲线薄壁箱梁
thin-walled box girder bridge 薄壁箱梁桥
curved thin-walled box girder 薄壁曲线箱梁
curved thin walled box girder 曲线薄壁箱梁
A two-node spatial non-linear thin-walled box girder element isput forward, which is based on Hellinger-Reissner hybrid variation principle. The non-linear FEM (finite element method) equation, elastic rigidity matrix, geometry matrix and pre-stress load column matrix were formulated.
2、提出了基于Hellinger-Reissner混合变分原理的两节点空间非线性薄壁箱梁单元，推导了增量形式的几何非线性有限元方程、弹性刚度矩阵、几何刚度矩阵、初应力荷载阵等的计算公式。
参考来源 - 薄壁箱梁混合单元及其在斜拉桥双重非线性分析中的应用研究The ship's hull is a thin-walled box girder structure composed of stiffened panels.
船体是由加筋板组成的薄壁箱形梁结构。
参考来源 - 船体板的屈曲和极限强度分析Thin-walled box girder is often used in bridge engineering.
箱形薄壁梁是桥梁工程中经常采用的结构。
参考来源 - 薄壁箱形梁剪力滞效应分析·2,447,543篇论文数据，部分数据来源于NoteExpress
Thin-walled box girder is often used in bridge engineering.
箱形薄壁梁是桥梁工程中经常采用的结构。
So it is necessary to do some further researches in thin-walled box girder, especially in multichambered thin wall box girder.
因而对于大跨径箱梁桥特别是多室薄壁箱梁进行进一步的探索，是很有必要的。
Multichambered Thin-walled box girder is a hyperstatic structure, it is a difficulty to solve its hyperstatic unknown shearing flow.
多室薄壁箱梁是超静定结构，求解其超静定未知剪力流是一个难点。
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