铁路列车作用下桥上轨面纵向力率取值研究  

Research on the Value of Longitudinal Force Rate Acting on Rail Surface of Bridge under the Action of Railway Trains

作　　者：李东昇 陈浩瑞 胡所亭 石龙 牛斌 LI Dongsheng;CHEN Haorui;HU Suoting;SHI Long;NIU Bin(Railway Engineering Research Institute,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China;China Academy of Railway Sciences Corporation Limited,Beijing 100081,China)

机构地区：[1]中国铁道科学研究院集团有限公司铁道建筑研究所,北京100081 [2]中国铁道科学研究院集团有限公司,北京100081

出　　处：《中国铁道科学》2023年第2期56-65,共10页China Railway Science

基　　金：国家铁路局标准科研计划项目(2019BZ20)。

摘　　要：针对我国铁路桥梁采用单一轨面纵向力率(0.164)与现有荷载图式不匹配的现状,运用MATLAB软件,进行不同荷载图式对应的铁路桥梁轨面纵向力率取值研究。结果表明:对应不同荷载图式,桥梁轨面纵向力率应按轨面制动、牵引力率分别取值;ZK和ZC荷载图式对应的轨面制动力率可分别取为0.075和0.09;ZKH和ZH (z=1.3)荷载图式对应的轨面制动力率在桥梁长度小于18 m时分别取0.25和0.20,大于100 m时分别取0.06和0.047,[18,100]m时取0,且轨面制动力分别取534和567 kN;ZK荷载图式对应的轨面牵引力率在桥梁长度小于14 m及[220,360]m时分别取0.33和0.03,在[14,220]m和大于等于360 m时取0,且轨面牵引力分别取440和710 kN;ZC荷载图式对应的轨面牵引力率在桥梁长度小于12 m及[12,60],[60,140]m时分别取0.12,0.07和0.05,大于等于140 m时取0,且轨面牵引力取360 kN;ZKH荷载图式对应的轨面牵引力率在桥梁长度小于25 m时取0.32,大于等于25 m时取0,且轨面牵引力取850 kN;ZH (z=1.3)荷载图式对应的轨面牵引力率在桥梁长度小于等于29 m时取0.25,大于等于29 m时取0,且轨面牵引力取950 kN。Aiming at the problem that the single rate(0.164)of longitudinal force acting on rail surface adopted by railway bridges in China does not match with the existing load diagrams,MATLAB software is used to carry out the research on the rate of longitudinal force acting on rail surface of railway bridges for different load diagrams.The results show that corresponding to different load diagrams,the rate of longitudinal force acting on rail surface of railway bridges should be determined according to the braking force and the traction force rates of rail surface separately.Corresponding to ZK and ZC load diagrams,the braking force rates of rail surface can be taken as 0.075 and 0.09,respectively.Corresponding to ZKH and ZH(z=1.3)load diagrams,the braking force rates of rail surface are determined as 0.25 and 0.20 respectively when the bridge length is less than 18 m,0.06 and 0.047 for greater than 100 m,and 0 for 18 m or 100 m while the braking forces are determined as 534 and 567 kN,respectively.Corresponding to ZK load diagrams,the traction force rates of rail surface are 0.33 and 0.03 respectively when the bridge length is less than 14 m or is 220 m or 360 m,and 0 for 14 m or 220 m or greater than and equal to 360 m while the traction forces of rail surface are 440 kN and 710 kN,respectively.Corresponding to ZC load diagrams,the traction force rates of longitudinal force acting on the rail surface are 0.12,0.07 and 0.05 respectively when the bridge length is less than 12 m,12 m or 60 m,or is 60 m or 140 m,and 0 when greater than and equal to 140 m,while the traction force of rail surface is 360 kN.Corresponding to ZKH load diagrams,the traction force rate of longitudinal force acting on the rail surface is 0.32 when the bridge length is less than 25 m,and 0 when greater than and equal to 25 m while the traction force is 850 kN.Corresponding to ZH(z=1.3)load diagrams,the traction force rate of longitudinal force acting on rail surface is 0.25 when the bridge length is less than 29 m,and 0 when greater than 29 m whil

关 键 词：铁路桥梁 荷载图式 轨面纵向力率 取值 制动力 牵引力 桥梁长度 

分 类 号：U441.2[建筑科学—桥梁与隧道工程]