腹板稳定性计算中临界应力的确定及稳定性验算  

Determination of critical stress and checking computation of stability in crane girder's web stability calculation

作　　者：侯屹 解劲东 

机构地区：[1]大连起重矿山机械有限公司,大连116036

出　　处：《起重运输机械》2010年第7期34-39,共6页Hoisting and Conveying Machinery

摘　　要：主要讨论在计算腹板的稳定性过程中,当计算的单项临界应力大于材料的0.8σs(或0.8σs/槡3)时,应该先将各个单项临界应力分别修正后,再计算临界复合应力,还是应该先计算出临界复合应力,视其若大于0.8σs时,再对其进行修正。用同一组数据,分别按2种修正方式进行计算,确定出修正结果偏于安全的方式。The paper mainly discusses the topic that, in crane girder＇s web stability calculation, when the single criti-cal stress is more than 0.8σs（或0.80σs/√3） of the material, whether the respective modification of the single critical stress first and then the critical combined stresses calculation or the latter first and then the modification in case of more than 0.8σs shall prevail. With the same set of data, the calculation is made according to the 2 modification methods and which method is safer is finally determined.

关 键 词：偏轨箱形梁 腹板 稳定性 临界应力 临界复合应力 修正 

分 类 号：TH21[机械工程—机械制造及自动化] TH123