摘要
考虑简支梁桥顺桥向振动特点,建立了固有振动模型:将桥墩简化为悬臂梁,在墩顶处采用弹簧模拟板式橡胶支座,上部结构简化为集中质量,基于贝努利——欧拉梁振动理论和达朗伯原理,考虑轴向力对简支梁桥顺桥向固有振动影响,得到了简支梁桥顺桥向固有振动的解析式.
According to the characteristics of longitudinal natural vibration for simply-supported beam bridge,the natural vibration model was established： the bridge pier was simplified to cantilever beam,the laminated rubber bearing was simplified to spring at the top of bridge pier,and the superstructure was simplified to lumped mass.Then the analytical expressions of the natural vibration of simply-supported beam bridge were derived from Bernoulli-Euler beam vibration theory and D＇Alembert Principle,and obtained the influence of the axial force on the natural vibration.
出处
《湖南文理学院学报（自然科学版）》
CAS
2012年第1期70-73,共4页
Journal of Hunan University of Arts and Science(Science and Technology)
关键词
简支梁桥
固有振动
频率
贝努利——欧拉梁
simply-supported beam bridge
natural vibration
frequency
Bernoulli-Euler beam
