摘要
探讨某双曲拱桥承载能力评估问题。根据双曲拱桥的主拱圈是拱桥主要受力结构的受力特点,采用ANSYS有限元分析程序,对某双曲拱桥进行受力分析和承载能力评估,具体过程为:根据该拱桥的受力特点,将拱肋与拱波形成的组合截面作为主拱圈的截面,将拱上建筑与桥面系作为集中或分布荷载作用在主拱圈上,按桥梁设计规范对拱桥施加活荷载,对桥梁进行力学性能计算,根据计算结果进行桥梁承载能力评估,计算结果表明:该桥在原设计荷载作用下,其轴力、剪力均能满足要求,拱脚及拱顶处的偏心距不满足。所以,应对该拱桥进行加固改造,以满足交通运输发展的需求。
This paper mainly discusses the problems of evaluating the bearing capacity of a two-way curved arch bridge. According to the stress characteristics that the main basic structures of the arch bridge are main arch ring, the finite element analysis program(ANSYS) is adopted to conduct the stress analysis and bearing capacity evaluation of a two-way curved arch bridge, and the procedures are as follows: based on the stress characteristics of the arch bridge, the composite section formed by the arch rib and arch wave is regarded as the section of the main arch ring; the dead load of the upper structures and deck system of the arch is considered as the concentrated or distributed load acting on the main arch ring; on the basis of the code of bridge design, the mechanical properties of the bridge are calculated; in the light of the calculating results, the bearing capacity of the bridge are evaluated. The results reveal that the axial and shearing forces both meat with demand when acted up under the original design load, whereas the eccentricities of the skew back and the vault's sections do not. Therefore, the reinforcement and rebuilding are necessarily required so as to meet with the demand of development transportation and communication.
出处
《河南科学》
2004年第1期108-112,共5页
Henan Science
基金
郑州大学和河南省高校创新人才资助项目(豫教高2001-53)
关键词
双曲拱桥
承载能力
评估
two-way curved arch bridge
bearing capacity
evaluate
