| Analysis of Common Fatigue Details in Steel Truss Structures |
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| 作者姓名： | 张玉玲 潘际炎 潘际銮 |
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| 作者单位： | [1]DepartmentofMechanicalEngineering,TsinghuaUniversity,Beijing100084,China; [2]BridgeSection,ChinaAcademyofRailwaySciences,Beijing100081,China |
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| 基金项目： | Supported by the Science and Technology Development Project of the Ministry of Railways，China (No. 96G35) |
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| 摘 要： | Generally, the number of fatigue cycles, the range of the repeated stresses, and the type of the structural details are the key factors affecting fatigue in large-scale welded structures. Seven types of structure details were tested using a 2000-kN hydraulic-pressure-servo fatigue machine to imitate fatigue behavior in modern steel-truss-structures fabricated using thicker welded steel plates and integral joint technology.The details included longitudinal edge welds, welded attachment affecting detail, integral joint, and weld repairs on plate edges. The fatigue damage locations show that the stress (normal or shear), the shape, and the location of the weld start and end points are three major factors reducing the fatigue strength. The test results can be used for similar large structures.
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| 关 键 词： | 焊钢构架 疲劳元件 疲劳方程 样品尺寸 钢结构 损坏机理 疲劳试验 |
Analysis of Common Fatigue Details in Steel Truss Structures |
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| ZHANG Yuling,PAN Jiyan,PAN Jiluan.Analysis of Common Fatigue Details in Steel Truss Structures[J].Tsinghua Science and Technology,2004,9(5):583-588. |
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| Authors: | ZHANG Yuling PAN Jiyan PAN Jiluan |
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| Institution: | ZHANG Yuling,PAN Jiyan,PAN Jiluan 1. Department of Mechanical Engineering,Tsinghua University,Beijing 100084,China, 2. Bridge Section,China Academy of Railway Sciences,Beijing 100081,China |
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| Abstract: | Generally, the number of fatigue cycles, the range of the repeated stresses, and the type of the structural details are the key factors affecting fatigue in large-scale welded structures. Seven types of struc- ture details were tested using a 2000-kN hydraulic-pressure-servo fatigue machine to imitate fatigue behav- ior in modern steel-truss-structures fabricated using thicker welded steel plates and integral joint technology. The details included longitudinal edge welds, welded attachment affecting detail, integral joint, and weld re- pairs on plate edges. The fatigue damage locations show that the stress (normal or shear), the shape, and the location of the weld start and end points are three major factors reducing the fatigue strength. The test results can be used for similar large structures. |
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| Keywords: | weld steel truss fatigue detail fatigue equations fatigue sample size |
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