摘要
为研究多肋系杆拱桥的稳定性,以130m跨径的多肋系杆拱桥为研究对象,通过有限元分析的方法分析屈曲模态观察模态屈曲方向得到系杆拱桥在其结构等分处容易发生失稳。设置对照实验组,通过改变风撑类型、固结位置和k型风撑节点角度来设立不同对照实验组,分析屈曲模态稳定系数变化规律确定横向联系对拱桥稳定性影响规律。设置平行实验确定不同位置吊杆损伤和吊杆倾斜角度对拱桥稳定性影响规律,对异常情况做出合理解释。经过实验对比,k字型节点角度控制20°~30°,斜吊杆倾角11°~38°比较好。增加吊杆索力能够提升拱桥稳定性,在外界条件允许的情况下可以尽量增加吊杆索力。
In order to study the stability of the multi-rib tied arch bridge,the multi-rib tied arch bridge with a span of 130m was taken as the research object,and the buckling mode was analyzed by using the method of finite element analysis,and the buckling direction of the modal buckling was observed,and it was found that the tied arch bridge was prone to instability at its structural equivalence.A control experimental group was set up,and different control experimental groups were set up by changing the type,position and angle of K-shaped wind brace joints,and the influence of lateral connection on the stability of the arch bridge was determined by analyzing the variation law of the characteristic value of the buckling mode.In the same way,parallel experiments were set up to determine the influence of boom damage and boom inclination angle on the stability of the arch bridge at different positions,and a reasonable explanation was given for the abnormal situation.After experimental comparison,the angle control of the k-shaped node is 20°~30°,and the inclination angle of the inclined boom is 11°~38°.Increasing the boom cable force can improve the stability of the arch bridge,and the boom cable force can be increased as much as possible if the external conditions allow.
作者
闵学峰
李海涛
Min Xuefeng;Li Haitao(School of Civil Engineering and Architecture,Anhui University of Science and Technology,Huainan,Anhui 232001,China)
出处
《黑龙江工业学院学报（综合版）》
2024年第9期146-151,共6页
Journal of Heilongjiang University of Technology(Comprehensive Edition)
基金
国家自然科学基金项目“侏罗系煤系地层冻结特性研究”(项目编号:41440018)。
