弯曲封板直角突变式钢吊车梁的疲劳强度分析  

FATIGUE STRENGTH OF RIGHT-ANGLE MUTATIONAL STEEL CRANE BEAM WITH CURVED END PLATE

作　　者：赵晓青[1] 惠云玲[1] 常好诵[1] 庄继勇 

机构地区：[1]中冶建筑研究总院有限公司,北京100088 [2]上海宝钢工业技术服务有限公司,上海210039

出　　处：《工业建筑》2017年第7期155-159,共5页Industrial Construction

基　　金："十三五"国家重点研发计划课题(2016YFC0701303)

摘　　要：弯曲封板直角突变式钢吊车梁,在2001年推广使用,至今已出现疲劳断裂工程实例。但针对此类钢吊车梁的研究较少,尤其缺乏疲劳试验研究,基于相似性原理,设计并开展了缩尺模型疲劳试验,基于试验数据及结构应力概念,统计回归该连接类型的疲劳强度S-疲劳寿命N曲线,对比总结缩尺模型与原型疲劳裂纹扩展模式,验证试验与工程实际的相似性。最后,通过工程实例验证了试验结果的可靠性、实用性。Right-angle mutational steel crane beam with curved end-plate has been widely used since 2001,and fatigue fracture accidents have occurred in actual engineering projects. However,the researches are less and the data of fatigue tests are extremely lacking for the crane runway girder. The scaled model tests based on the similarity principle were designed and carried out. The S-N curves of the right-angle mutational steel crane beams with curved end-plate were pointed out based on test data and the conception of structural stress. The similarities were validated by comparing the fatigue crack growth modes of test model and prototype. Finally,the reliable and practicability of the research results were verified by applying the results in an engineering example.

关 键 词：弯曲封板 直角突变式 钢吊车梁 疲劳试验 寿命评估 结构应力 

分 类 号：TU391[建筑科学—结构工程]