摘要
为研究斜拉拱式协作体系桥梁动力性能与抗震特性,文中以大连市翔凤河桥为工程背景,建立空间梁格模型,并进行了结构模态分析与抗震时程分析。结果表明该桥基频较低,整体刚度较小,面内刚度明显大于面外刚度,横向稳定性问题较为突出,结构对竖向地震作用不敏感,倾斜塔柱降低了其竖向刚度,是不利的。在桥及类似桥梁设计时,应适当增大塔柱刚度,并对拱脚、风撑进行加强设计。
In order to study the dynamic performance and seismic characteristics of the bridge with diagonal arch collaborative system,taking Dalian Xiangfeng River Bridge as the engineering case,the spatial beam lattice model was established,and the structural modal analysis and seismic time analysis were carried out.The results show that the bridge has low fundamental frequency and small overall stiffness,moreover,in-plane stiffness is obviously larger than out-plane stiffness,and lateral stability problems are much more prominent.In addition,It is unfavorable that the structure is not sensitive to vertical seismic action as the inclined ower reduces its vertical stiffness.Therefore,the tower stiffness should be increased appropriately,and the arch legs and wind braces should be strengthened in the design of this bridge and similar bridges.
作者
武俊刚
WU Jungang(Heilongjiang Province Long Jian Road&Bridge First Engineering Co.,Ltd.,Harbin 150040,China)
出处
《低温建筑技术》
2021年第10期77-80,共4页
Low Temperature Architecture Technology
基金
哈尔滨市人才基金项目(RC2017QN012019)。
