摘要
在运营的刚架拱桥大多破损严重,针对病害特点和结合实际工程对刚架拱桥进行了改进设计,建立空间有限元模型对其进行了静力和动力力学性能的分析,分析时采用了更能反映结构真实刚度的梁板组合模型。分析结果表明:梁板组合模型可以应用到类似结构的工程设计,提高设计效率;刚架拱的主要断面受力的控制工况为收缩徐变和拱角位移,设计时要引起重视;改进设计后提高了结构的扭转刚度,改善了原定型设计刚架拱整体刚度较弱的缺点,为以后刚架拱的应用前景提供了一个新的思路。
Most of old rigid frame arch bridges in service have been seriously damaged. Aiming at the fault characteristics and combined with the practical projects, the rigid-frame arch bridge is improved and designed.The spatial finite element software is established to analyze its static and dynamic performances. The bean and plate combination model is used to reflect the structural stiffness more accurately during analysis. The analysis result shows that the bean and plate combination model can be used for the engineering design of the similar structures and improve the design efficiency. The controlling conditions of the main section stress of rigid-frame arch are the shrinkage creep and the arch angel displacement, which should be concerned during design. After the improvement design, the torsional rigidity of structure is improved, and the disadvantage of lower integrated rigidity of original designed rigid-frame arch is overcome, which provides a new idea for the application of the similar rigid-frame arch.
出处
《城市道桥与防洪》
2017年第3期88-90,104,共4页
Urban Roads Bridges & Flood Control
关键词
刚架拱桥
有限元
梁板组合模型
平截面假定
rigid-frame arch bridge
finite element
beam and plate combination model
plane section assumption
作者简介
罗飞（1975-），男，内蒙古乌兰察布人，工程师，从事桥梁与隧道设计工作。
