期刊论文

Yu, Z.

中文

北京工业大学学报

0254-0037

2022

48

1

41-51

10.11936/bjutxb2020070006

国家自然科学基金资助项目（51468010）；

本校为其他机构

大跨度高速铁路桥常采用刚度和动力性能良好的拱桥结构,但是随着拱桥服役期增长,列车运营速度不断提高,结构性能退化严重,难以满足正常运营的要求.为了解决现役铁路拱桥存在力学性能不足的问题,基于三角形稳定性和桁架结构变形小的原理,提出一种结构改进方法,具体做法为在拱肋与主梁之间增设若干个V型结构,使其与拱和梁段构成若干个连续的三角形结构,从而对主梁与拱肋进行有效约束. V型结构布置的位置需综合考虑对拱肋与主梁的均匀约束及其结构的薄弱位置,其个数尽可能使结构的刚度与温度响应之间达到较为合理的平衡状态.有限元分析结果表明,该方法能有效改善原结构的刚度、动力特性、抗疲劳性和...

Long-span high-speed railway bridges usually adopt arch bridge structures with good stiffness and dynamic performance. However, as the service life of the arch bridge increases and the train operating speed increases continuously, the structural performance degrades seriously and is difficult to meet the requirements of normal operation. To improve mechanical performance of railway arch bridge in service, a structural improvement method was proposed based on the principle of triangular stability and small deformation of the truss structure in t...