摘要
为明确大跨径公路独塔斜拉-悬索协作桥的合理竖向刚度,首先根据现有规范规定、已建缆索承重桥竖向挠跨比取值、附属装置及线形规定、行车安全及舒适性要求等4个方面的调研结果,明确行车安全性和舒适性是评价桥梁刚度的最直接方法;然后提出了基于体系拆解及风-车-桥耦合振动分析进行竖向刚度评价的方法,结合调研分析确定了以挠跨比1/330作为斜拉-悬索协作桥竖向刚度限值;最后以某2×638 m跨径独塔斜拉-悬索协作体系桥为研究对象,进行了竖向刚度评价,结果表明该桥竖向刚度合理。
To clarify the reasonable vertical stiffness of long-span highway cable-stayed suspension hybrid bridge with single tower,four aspects are investigated firstly,including existing specifications,the vertical deflection span ratio of existing cable supported bridges,accessory devices and linear regulations,and requirements for driving safety and comfort.It is clarified that driving safety and comfort are the most direct methods for evaluating bridge stiffness.Secondly,a method for evaluating vertical stiffness based on system disassembly and wind-vehicle-bridge coupling vibration analysis is proposed.Combined with research and analysis,a deflection-span-ratio of 1/330 is proposed as the vertical stiffness limit for cablestayed suspension bridges.Finally,with a certain 2×638m span single tower cable-stayed suspension hybrid bridge being the background,the vertical stiffness evaluation is conducted,indicating that the vertical stiffness of the bridge is reasonable.
作者
张耀辉
王茂强
霰建平
肖军
杨怀茂
ZHANG Yao-hui;WANG Mao-qiang;XIAN Jian-ping;XIAO Jun;YANG Huai-mao(CCCC Second Highway Engineering Co.Ltd.,Xi'an 710065,China;CCCC Highway Bridges National Engineering Research Centre Co.Ltd.,Beijing 100088,China)
出处
《公路》
北大核心
2025年第7期99-105,共7页
Highway
基金
中国交通建设集团有限公司科技项目,项目编号YSZX-01-2022-03-B。
关键词
桥梁工程
斜拉-悬索协作桥
竖向刚度
评价方法
体系拆解
耦合振动分析
bridge engineering
cable-stayed suspension hybrid bridge
vertical stiffness
evaluation method
system disassembly
coupling vibration analysis
