摘要
基于有限元程序Ansys,采用分块兰索斯法,分析了人行索桁桥的振动特性,采用国际标准化组织ISO 10137《结构设计基础—建筑物和人行道抗振的适用性标准》,考虑不同人行荷载形式,分析了单人荷载和人群荷载作用下人行索桁桥的侧向和竖向加速度.选取了考虑人行桥侧向与竖向耦合振动的综合评价方法,对人行索桁桥的竖向舒适度和侧向舒适度进行了综合分析.研究结果表明:在不同行人荷载作用下,人行索桁桥不会发生超越舒适度指标的振动;与其他普通悬索桥相比,由主索、桥面索和吊索组成的新型索桁桥,能够在满足使用要求、舒适度要求的同时,减轻了桥梁的质量,降低了经济成本.
Using block Lanczos method,the vibration characteristic of suspension footbridge was analyzed by finite element program of ANSYS.According to the standard of bases for design of structures-serviceability of buildings and walkways against vibrations（ISO 10137）,the pedestrian load was simulated.The lateral and vertical bridge accelerations caused by single person and crowd loads were analyzed,respectively.The comfort of pedestrian bridge was analyzed by comprehensive comfort evaluation method.The results show that the comfort performance of suspension footbridge structure meets the requirements.Compared with common suspension bridge,the new suspension footbridge with upper main cables,lower bridge deck cables and suspenders not only meets the requirements of comfort and serviceability,but also reduces the mass and the economic costs.
出处
《江苏大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2014年第5期605-610,共6页
Journal of Jiangsu University：Natural Science Edition
关键词
人行索桁桥
舒适度评价
自振频率
振动模态
人行荷载
人致振动
suspension footbridge
comfort evaluation
natural frequency
frequency mode
pedestrian induced load
pedestrian-induced vibration
