建立跨中截面三维计算模型，比较三维与二维流场数值模拟的异同。
Thirdly, a 3D computation model of the mid-span section deck was established, the similarity and difference between 2D and 3D numerical simulation of flow field are compared also.
计算结果表明：跨中截面上下缘应力计算值与试验值误差在5%左右，跨中挠度误差在1%左右。
The result indicated that, the section upper and lower reason stress error is about 5% while stepping, the deflection error, about 1%.
通过考虑接触与不考虑接触两种情况时桥面板跨中截面的受力分析，验证该问题中接触有限元模型的正确性。
By analysis of the middle section stress of the hollow slab in the two situations of consider contact and not consider contact, verified the accuracy of contact finite element model in that situation.
在以往的钢筋混凝土梁截面非线性分析中，对于剪跨比较大时通常的做法是不考虑剪力的影响，这种简化方法所带来的误差不大。
The effect of shear on the nonlinear sectional analysis is often ignored when the shear span ratio is large, it is believed to be appropriate as it brings little error.
主梁截面面积变异对斜拉桥跨中挠度和尾索索力具有显著的影响。
The variation of sectional area of girders has influence to the deflection of cable-stayed Bridges at the middle of span and forces of cables anchored at the end of side span.
在设计中当等截面连续梁的计算跨度相差不超过10%时，可用等跨的图表来进行内力计算。
When actual span D-value of equal section continuous beam in designs is less 10%, equal span chart is employed to calculate internal force.
大跨径PC箱梁桥因为其具有截面抗扭刚度大、效率高等优点，被广泛应用于中等跨径的公路桥梁工程中。
Long span PC box girder Bridges have been widely used in middling span Bridges in highway engineering as they possess many merits, such as huge torsion stiffness, high section efficiency.
简支梁桥以其桥跨外形一致、截面相同、构造布置统一的优点在高速铁路中得到了广泛的应用。
Owing to consistent bridge span forms, similar sections and unified structures, simply supported girder bridges have been widely applied in the high speed railway.
在设有大吨位吊车系统的重型厂房中，吊车梁用钢量所占比例较大，对吊车梁的优化设计对工程造价影响很大，大跨多跨重型厂房吊车梁宜采用突缘变截面简支结构。
The weight of steel for crane beam has a great proportion in the total amount consumed in the construction of the heavy-duty plant with large-tonnage cranes.
其次，实测单悬臂T梁跨中、四分点截面挠度横向分布与悬臂端牛腿处挠度横向分布基本接近。
The transverse distribution of load at midspan or quarter span obtained by tested deflections of beams approaches th…
其次，实测单悬臂T梁跨中、四分点截面挠度横向分布与悬臂端牛腿处挠度横向分布基本接近。
The transverse distribution of load at midspan or quarter span obtained by tested deflections of beams approaches th…
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