钢轨及其铝热焊缝低温下接触承载力分析  

ANALYSIS ON THE CONTACT BEARING CAPACITY OF RAIL AND ITS THERMIT WELDING JOINTS AT LOW TEMPERATURE

作　　者：王元清[1] 奚望[1] 石永久[1] 

机构地区：[1]清华大学结构和振动教育部重点实验室清华大学土木工程系,北京100084

出　　处：《低温建筑技术》2008年第5期1-4,共4页Low Temperature Architecture Technology

基　　金：国家自然科学基金(No.50778102和No.50078029);铁道部-清华大学科技研究基金项目(No.t200410)

摘　　要：随着机车轴重的增大,钢轨及其铝热焊缝承受轮载而产生的接触应力和剪应力将相应的增大,这将使钢轨及其铝热焊缝的轨头提前出现各种性质的伤损。对于在低温下工作的铁道线路,本文计算确定了不同温度时轮轨接触条件下钢轨及其铝热焊缝所能承受的最大容许轴重,并推算了避免引起钢轨及其铝热焊缝伤损的作用力的大小。Rail and its welding joints bear much bigger contact stress and shearing stress when the gross load on axle became heavier, which would bring different kinds of injuries to rail steel and its welding joints. For the railway at low temperatures, this paper determined the maximum allowable loads on axle and maximum loads that would not cause injury of rail and its thermit welding joints.

关 键 词：钢轨 铝热焊缝 低温 接触承载力 

分 类 号：TU391[建筑科学—结构工程]