单箱多室波形钢腹板组合箱梁动力特性研究

发布时间：2018-04-30 02:30

本文选题：波形钢腹板 + 动力特性　；参考：《铁道工程学报》2017年09期

【摘要】：研究目的:为分析单箱多室波形钢腹板组合箱梁的动力性能与混凝土箱梁的差异,本文设计并制作两片跨径为5.2 m的试验梁,利用有限元软件ANSYS建立其三维实体模型,通过模态试验与有限元分析相结合的方法对试验梁进行研究,并就横隔板的设置对单箱多室波形钢腹板组合箱梁与混凝土箱梁扭转振动频率的影响进行分析。研究结论:(1)模态试验的结果与有限元分析结果基本吻合,说明实测结果是正确的,同时也验证了有限元模拟方法是合理的;(2)单箱多室波形钢腹板组合箱梁的基频略大于相应规模的混凝土箱梁,而高阶竖向弯曲振动频率均小于混凝土箱梁;(3)单箱多室波形钢腹板组合箱梁扭转振动频率对梁间设置横隔板的影响与混凝土箱梁相比较敏感;(4)横隔板的位置对单箱多室波形钢腹板组合箱梁扭转振动频率的影响较大;(5)该研究成果对单箱多室波形钢腹板组合箱梁的动力学分析具有一定的参考价值。
[Abstract]:Research purpose: in order to analyze the difference between the dynamic performance of single box and multi-chamber corrugated steel web composite box girder and concrete box girder, two test beams with a span of 5.2 m were designed and made in this paper. The three-dimensional solid model was established by using the finite element software ANSYS. The test beam is studied by the combination of modal test and finite element analysis, and the influence of the setting of transverse diaphragm on the torsional vibration frequency of single box multi-chamber corrugated steel web composite box girder and concrete box girder is analyzed. Conclusion: 1) the results of modal tests are in good agreement with the results of finite element analysis, which shows that the measured results are correct. At the same time, it is proved that the finite element simulation method is reasonable. The fundamental frequency of the composite box girder with single box and multi-chamber corrugated steel webs is slightly higher than that of concrete box girder of corresponding scale. The frequency of high-order vertical bending vibration is lower than that of concrete box girder.) the effect of torsional vibration frequency of single box multi-chamber corrugated steel web composite box girder on setting transverse diaphragm between beams is sensitive to concrete box girder. The effect of torsional vibration frequency on the torsional vibration frequency of box girder with multi-chamber corrugated steel webs is great. The research results have certain reference value for dynamic analysis of single box multi-chamber corrugated steel web composite box girder.
【作者单位】：华东交通大学;东南大学;
【基金】：国家自然科学基金项目(50078014) 交通运输部科研项目(2011-318-775-680)
【分类号】：U441.3

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