摘要
采用数值模拟和现场实测等方法对尼尔森体系提篮拱桥在城市人行天桥中的应用进行分析研究。对尼尔森体系人行拱桥结构进行受力分析,研究结果表明这种结构形式跨越能力大,整体刚度大,稳定性好。舒适度评价是人行桥设计的重要指标,通过对尼尔森体系拱桥与洛泽拱桥的自振特性进行对比分析,表明吊杆交叉布置的尼尔森体系拱桥比吊杆竖直布置的洛泽拱桥基频大。通过实测桥梁结构的动力特性,验证了尼尔森体系提篮式拱桥满足各国规范规定的加速度限值要求,舒适度较好。
The basket-handle through tied arch bridge of Nielsen system used in pedestrian bridge is a relativelynew form.Numerical simulation and field measurement of this kind of bridge was analyzed.The stress analysis ofa Nielsen-system pedestrian bridge approved its long span capability,high global stiffness and super stability.Another important factor in pedestrian bridge design is comfort assessment.Based on the free vibrationcharacteristics,a Nielsen-system arch bridge with cross suspenders showed a larger fundamental frequency andthus was of higher comfort degree compared with a Lohse arch bridge with vertical suspenders.By measuring thedynamic characteristics of bridge structure,the Nielsen system arch bridge was verified to meet national standardacceleration limits.
作者
常柱刚
CHANG Zhugang(Changsha Planning & Design Institute Co., Ltd, Changsha 410007, China)
出处
《铁道科学与工程学报》
CAS
CSCD
北大核心
2017年第8期1681-1688,共8页
Journal of Railway Science and Engineering
基金
国家自然科学基金资助项目(51478472)
关键词
尼尔森体系
拱桥
人行桥
舒适度
现场实测
Nielsen System
tied-arch
pedestrian bridge
vibration comfort
field measurement
