河北水利电力学院学报

河北水利电力学院学报 ›› 2018, Vol. 28 ›› Issue (1): 13-18.DOI: 10.16046/j.cnki.issn1008-3782.2018.01.003

• 技术理论与应用 • 上一篇    下一篇

结构参数对上承式大跨度钢管混凝土拱桥自振特性的影响

李自林1，2，孟 亚2   

  1. 1.河北水利电力学院土木工程系，河北省沧州市重庆路1号 061001;
    2.天津城建大学土木工程学院，天津市西青区津静公路26号 300384

  • 收稿日期:2017-11-30 修回日期:2018-01-09 出版日期:2018-03-31 发布日期:2018-04-30
  • 作者简介:李自林(1953-)，男，河北成安人，河北水利电力学院教授，主要从事桥梁结构稳定与振动研究｡Email:Hebeigaomuying@163.com
  • 基金资助:
     国家自然科学基金项目(51578370);; 住建部科学技术项目(2015-K3-021)

Influence of Structure Parameters on Self Vibration Characteristics of Deck Type Long Span CFST Arch Bridge

LI Zi-lin1,2,MENG Ya2   

  1. 1.Department of Civil Engineering,Hebei University of Water Resources an Electric Engineering,061001,Cangzhou,Hebei,China;
    2.School of Civil Engineering,Tianjin Chengjian University,300384,Tianjin,China

  • Received:2017-11-30 Revised:2018-01-09 Online:2018-03-31 Published:2018-04-30

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摘要： 桥梁结构的动力特性研究,是研究桥梁结构抗震性能的基础。以西溪河大桥为背景,利用有限元软件MIDAS CIVIL建立其数值模型,分析拱上立柱支撑、主拱圈含钢率、拱肋矢跨比等结构参数对西溪河大桥动力特性的影响,得到了各参数对桥梁结构动力特性的影响规律。研究结果表明:西溪河大桥侧向刚度小于纵向刚度,面外稳定性问题要多加考虑;采用"K"字型支撑结构稳定性最高,有利于控制拱肋横向变形,并且可以提高桥梁的抗扭刚度;桥梁结构的自振频率随着矢跨比增加而降低;适当增加拱肋含钢率可以提高结构稳定性。

关键词: 桥梁工程, 自振特性, MIDAS CIVIL软件, 上承式钢管混凝土拱桥

Abstract: The research on the dynamic characteristics of bridge structure is the foundation to study the seismic performance of bridge structure.Taking Xixi River Bridge as the background,this paper established a numerical model using the finite element software MIDAS CIVIL,it analysed the influence of structure parameters such as arch column supporting,main arch steel ratio,arch span ratio on the dynamic characteristics of the Xixi River Bridge,and obtained the influence law of the parameters on the dynamic characteristics of bridge structure.The results show that the lateral stiffness of the Xixi River Bridge is smaller than the longitudinal stiffness,out-plane stability problems must be considered;K-type supporting structure stability is the highest,which is conducive to the control of arch rib lateral deformation,and can improve the torsional stiffness of bridge;the bridge structure vibration frequency reduces with increasing span ratio;and increasing the ratio of steel arch rib can improve the stability of structure.

Key words: bridge engineering, self vibration characteristics, MIDAS CIVIL, deck type CFST arch bridge

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