不同斜拉索模型对多塔斜拉桥力学性能的影响

发布时间：2018-03-18 17:31

本文选题：斜拉索　切入点：有限元　出处：《公路工程》2017年02期 　论文类型：期刊论文

【摘要】：斜拉索由于其轻、柔的特点,经常在外部环境的影响下产生较大的振动,从而对桥梁的力学性能产生影响。以赤石大桥为工程背景,采用不同的斜拉索单元建立了不同的四塔斜拉桥整桥有限元模型,对桥梁的变形、频率、模态等力学性能进行了系统地研究。采用弦振动理论计算出了斜拉索的自振频率与ANSYS算出的索单独振动的频率进行了对比。结果表明,斜拉索采用BEAM3或者LINK1单元时计算出的索单独振动的频率与弦振动理论算出的频率吻合得非常好,短索所得计算结果相对于长索误差稍大。
[Abstract]:The cable due to its lightweight, soft features, often cause large vibration under the influence of external environment, so as to influence the mechanical properties of the bridge. To chishi bridge as the engineering background, the establishment of the four tower cable-stayed bridge of the whole bridge finite element model of the cable element was different, deformation of bridge the frequency, modal and other mechanical properties were systematically studied. The theory of string vibration is calculated comparing frequency cable vibration alone cable vibration frequency and ANSYS are calculated. The results show that the cable using BEAM3 or LINK1 unit meter calculated cable vibration frequency and single string vibration theory calculate frequency a good agreement is obtained, the calculated results are compared to the short cable cable length error is slightly larger.

【作者单位】：湖南大学土木工程学院;
【基金】：国家自然科学基金项目(11572117,11502076) 湖南省交通厅项目(201428)
【分类号】：U448.27

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