算例说明，应用近似计算式将使三线钢桁梁桥的疲劳检算变得简单、方便。
Calculation example shows that fatigue check and computation of steel truss bridge becomes simpler and more convenient by employing approximate formula.
结果表明：在钢桁梁桥弦杆内填混凝土能降低杆件的应力水平，提高桥梁的整体刚度。
The results show that the stresses of chord members of partially concrete-filled steel truss bridge are decreased, while its integral stiffness is increased.
该研究思路和方法也为四线钢桁梁桥及更多线钢桁梁桥的疲劳检算多线系数研究提供依据。
The research ideas as well as (approaches) have provided useful reference of multiple-line coefficient for fatigue check and computation of four-line and multiple-line steel truss bridge.
计算表明：由于钢桁梁桥的抗扭刚度较小，曲线钢桁梁桥的弯扭耦合作用对动力分析有很大的影响。
The result shows that: because of steel truss bridge's small torsional rigidity, bending-torsion coupling vibration of steel truss bridge exerts great influence on dynamic analysis.
以外白渡桥为例，详细介绍了一套综合传统疲劳分析和断裂力学的混合方法，并用以计算老钢桁梁桥剩余寿命。
With this method the remaining fatigue life and safety of old riveted truss bridge were calculated with Waibaidu bridge as an example.
双梁桥架上有2根轨道，用于桁梁应垫梁应垫在各节点处，下车轨道边上的工字钢也要垫好。
There are 2 rail dual beam bridge, for pad beam pad on each node truss should get off track, on the edge of the I-beam to pad.
分3个阶段10种荷载工况进行模型的力学性能试验，研究简支下承式钢桁结合梁桥的受力性能。
The mechanical property test of the model covering 3 stages under 10 load conditions is carried out to study the loading property of through truss composite beam with simple support.
着重介绍该桥的刚构、钢箱提篮拱与钢桁梁的施工方案、关键施工技术及施工控制要点。
In this paper, the construction schemes, key construction techniques and construction control of the rigid -frame structure, steel box basket handle arch and steel trusses, are mainly described.
通过改变钢桁梁模型桥单元刚度模拟其结构损伤，利用有限元结构动力分析程序对该模型桥在”损伤”前后进行了结构动力分析。
The dynamic behaviors of the model bridge are analyzed with FEM dynamic structural analysis program before and after the model bridge is damaged.
通过改变钢桁梁模型桥单元刚度模拟其结构损伤，利用有限元结构动力分析程序对该模型桥在”损伤”前后进行了结构动力分析。
The dynamic behaviors of the model bridge are analyzed with FEM dynamic structural analysis program before and after the model bridge is damaged.
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