速度120 km/h跨座式单轨简支梁竖向合理刚度研究  

Research on Reasonable Vertical Stiffness of Simply Supported Beam of Straddle Monorail Transit with Speed of 120 km/h

作　　者：简方梁 刘永锋 李昊 李金凯 JIAN Fangliang;LIU Yongfeng;LI Hao;LI Jinkai(China Railway Engineering Design Consulting Group Co., Ltd., Beijing 100055, China)

机构地区：[1]中铁工程设计咨询集团有限公司,北京100055

出　　处：《交通科技》2021年第5期67-71,共5页Transportation Science & Technology

基　　金：中铁工程设计咨询集团科技研究计划课题(产品研2018-2-2)资助。

摘　　要：目前针对速度120 km/h跨座式单轨轨道梁研究尚处于空白阶段。文中提出静力设计与动力设计相结合的方法,对速度120 km/h跨座式单轨简支梁的竖向合理刚度进行研究。首先采用现行规范方法,对常用跨度跨座式单轨简支梁进行静力设计,确定备选梁高。然后将跨座式单轨车辆荷载等效为移动荷载列,通过自编程序进行动力求解,优选适应于速度120 km/h跨座式单轨的合理梁高。研究结果表明,速度120 km/h的常用跨度跨座式单轨简支梁的合理基频和跨度L的乘积均在103 L左右,可取竖向合理基频值为100/L。The research on straddle monorail beam with a speed of 120 km per hour is still in a blank stage,and relevant research is urgently needed.The reasonable vertical stiffness of the straddle type monorail simply supported beam with a speed of 120 km/h is analyzed by combining static and dynamic methods.Firstly,the static analysis of the common span straddle type monorail simply supported beam is carried out by using the existing standard method to determine the alternative beam height.Then,the load action of straddle type monorail vehicle is simplified as equivalent moving load vector,and the dynamic solution is carried out by self-programming.The reasonable beam height suitable for 120 km/h straddle type monorail is optimized.The results show that the product of the reasonable fundamental frequency and the span L is about 103,and the vertical reasonable fundamental frequency can be taken as 100/L.

关 键 词：速度120 km跨座式单轨 简支梁 竖向合理刚度 竖向合理基频 

分 类 号：U448.13[建筑科学—桥梁与隧道工程] U448.217[交通运输工程—道路与铁道工程]