为给我国涉外桥梁工程项目设计提供参考，对我国与南非桥梁设计规范中汽车荷载效应进行对比研究。采用铰接板梁法和刚接梁法，计算常用跨径的单片简支梁在南非与中国规范汽车活载作用下的横向分布系数。在此基础上，通过对简支梁及整体式连续梁的纵向影响线加载，分析2种规范中考虑汽车活载纵、横向分布后的差异。对比发现，对于常用中小跨径的简支、连续梁，南非规范汽车活载效应均高出中国规范30％以上；对于简支T梁跨中截面及连续梁支点截面，南非规范汽车活载效应高出中国规范35％～80％。即便考虑到两国规范中汽车冲击效应计入方式的不同，南非规范汽车活载也大于中国规范规定值。%For this study ,the traffic load effect in the JTG D06-2004 and Draft Code of Prac‐tice for the Design of Road Bridges and Culverts (SATCC) is contrastively studied ,with the aim of providing references for the design of China′s overseas bridge engineering projects .The methods of hinged plate beam and rigidly connected beam were used to calculate the transverse distribution co‐efficients of single beam simply‐supported bridge with common span lengths under traffic loads prescribed in SATCC and JTG D06-2004 ,respectively .Based on this analysis ,by applying loads to the longitudinal influential lines of the simply‐supported beam and integrated continuous beam , the difference of the two kinds of bridges taking into account the longitudinal and transverse distri‐bution of traffic loads in the two codes were analyzed .The results of the analysis indicate that for the simply‐supported and continuous beams with small and medium spans ,the traffic loads pre‐scribed in SATCC is 30% higher than that in JTG D06-2004 ;and for the midspan cross section of simply‐supported T beam and support cross section of continuous beam ,the traffic load effect in SATCC is 35% ~80% higher than that in JTG D06-2004 .Even when the different inclusion ways of traffic impact effect in the two codes are considered ,the traffic loads prescribed in SATCC are higher than those prescribed in JTG D06-2004 .
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