摘要
针对世界上第一座钢-砼组合连续梁-V腿连续刚构桥,研究其自振特性,并进行了实桥的自振特性测量。研究结果表明:前3阶自振均不是主梁在竖向的振动,说明该桥的竖向刚度强于横向刚度;1阶竖向振动出现在结构的第4阶自振,频率为3.391 Hz;结构的1阶扭转出现在第6阶自振,频率为4.449 Hz;V腿结构的纵向和横向截面刚度会对钢-砼组合连续梁-V腿连续刚构桥整体的自振特性有明显影响。
The natural vibration characteristics of the first steel-concrete composite continuous beam-v-leg continuous rigid frame bridge in the world are studied,and the natural vibration characteristics of the real bridge are measured in order to find out its natural vibration characteristics.The results show that the first three natural vibrations are not the vertical vibration of the main girder.The results show that the lateral stiffness of the structure may be weak;the first-order vertical vibration occurs in the fourth-order natural vibration of the structure,and the frequency is 3.391 Hz.The first order torsion of the structure occurs in the sixth order natural vibration,and the frequency is 4.449hz.The longitudinal and transverse section stiffness of V-leg structure has obvious influence on the natural vibration characteristics of steel-concrete composite continuous beam-v-leg continuous rigid frame bridge.
作者
曾勇
李勇岐
余滔
肖光烈
李强
董志龙
ZENG Yong;LI Yong-qi;YU Tao;XIAO Guang-lie;LI Qiang;DONG Zhi-long(State Key Laboratory of Mountain Bridge&Tunnel Engineering,Chongqing Jiaotong University,Chongqing 400074,China;Center for Mountain Bridge Structures&Materials Engineering Research,Ministry of Education of Engineering,Chongqing Jiaotong University,Chongqing 400074,China;Yongchuan Highway Service Center,Chongqing 402160,China;China Metallurgical Construction Engineering Group Co.,Ltd.,Chongqing 400084,China;China Railway 16th Bureau Group Co.,Ltd.,Beijing 101400,China)
出处
《河南城建学院学报》
2021年第4期1-6,13,共7页
Journal of Henan University of Urban Construction
基金
国家自然科学基金(51478071)。
关键词
钢-砼组合结构
连续梁-连续刚构桥
V形墩
组合体系
自振特性
频率
steel-concrete composite structure
continuous beam continuous rigid frame bridge
V-shaped pier
composite system
dynamic characteristics
frequency
