提篮拱桥空间动力性能分析
|
摘要
以平顶山市湛河二桥为工程背景,采用有限元程序ANSYS建立该桥的空间有限元计算模型,对其进行了动力特性分析。计算结果表明:该桥拱肋的横向刚度较桥梁的竖向刚度和扭转刚度弱,桥梁首先出现拱肋的横向振动,拱脚位置处易发生拱肋的局部横向振动,是全桥的动力薄弱部位;桥梁前几阶自振周期较长,在结构抗震设计采用振型叠加法计算时,应考虑多阶振型,以减少质量缺损带来的影响;桥梁各个构件空间协作能力较强,具有良好的整体性能。所得结论可为类似桥梁设计提供参考。
The second Zhanhe bridge in the city of Pingdingshan is taken as the engineering background,its spatial finite element model is established by adopting the finite element program ANSYS,and its dynamic property analysis has been carried out.The obtained results indicate that the transverse stiffness of arch rib is weaker than the vertical and torsional stiffness of the bridge,the transverse vibration of arch rib appears first,and the local transverse vibration is prone to occurrence at the end of arch rib,so there is a dynamic weak point of the bridge;The results also show that the first several natural vibration periods are longer,the more modes of vibration should be taken into account mode-superposition method in the seismic design of the bridge,in order to decrease influence of the shortage of mass;each member of the bridge cooperates well,and the bridge has better grobal property.The conclusions can offer reference for the design of similar bridges.
The second Zhanhe bridge in the city of Pingdingshan is taken as the engineering background,its spatial finite element model is established by adopting the finite element program ANSYS,and its dynamic property analysis has been carried out.The obtained results indicate that the transverse stiffness of arch rib is weaker than the vertical and torsional stiffness of the bridge,the transverse vibration of arch rib appears first,and the local transverse vibration is prone to occurrence at the end of arch rib,so there is a dynamic weak point of the bridge;The results also show that the first several natural vibration periods are longer,the more modes of vibration should be taken into account mode-superposition method in the seismic design of the bridge,in order to decrease influence of the shortage of mass;each member of the bridge cooperates well,and the bridge has better grobal property.The conclusions can offer reference for the design of similar bridges.
引文
[1]杨磊.提篮式拱桥力学性能分析及施工控制研究[D].郑州:郑州大学,2005.
[2]陈淮,王艳,董建华,等.康富钢管混凝土拱桥振动特性分析[J].世界地震工程,2003,19(4):51-56.
[3]陈淮,朱倩,葛素娟,等.韩江北桥主桥动力特性研究[J].铁道科学与工程学报,2005,2(5):28-31.
[4]郭静,童丽萍.空间组合桥梁体系的动力特性分析[J].世界地震工程,2002,18(4):163-166.
[5]陈水盛,陈宝春.钢管混凝土拱桥动力特性分析[J].公路,2001,(2):10-14.
[6]程海根,强士中.钢管混凝土提篮拱桥动力特性分析[J].公路交通科技,2002,19(3):63-65.
[7]任翔,许汉铮.钢管混凝土提篮式拱桥动力特性及参数敏感性分析[J].公路,2008,(4):78-83.
[8]陈宝春.钢管混凝土拱桥设计与施工[M].北京:人民交通出版社,1999.
[2]陈淮,王艳,董建华,等.康富钢管混凝土拱桥振动特性分析[J].世界地震工程,2003,19(4):51-56.
[3]陈淮,朱倩,葛素娟,等.韩江北桥主桥动力特性研究[J].铁道科学与工程学报,2005,2(5):28-31.
[4]郭静,童丽萍.空间组合桥梁体系的动力特性分析[J].世界地震工程,2002,18(4):163-166.
[5]陈水盛,陈宝春.钢管混凝土拱桥动力特性分析[J].公路,2001,(2):10-14.
[6]程海根,强士中.钢管混凝土提篮拱桥动力特性分析[J].公路交通科技,2002,19(3):63-65.
[7]任翔,许汉铮.钢管混凝土提篮式拱桥动力特性及参数敏感性分析[J].公路,2008,(4):78-83.
[8]陈宝春.钢管混凝土拱桥设计与施工[M].北京:人民交通出版社,1999.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心