吊车轨道偏心对大吨位吊车梁受力性能的影响  

Influence of Rail Eccentricity on Behaviour of Large Tonnage Crane Beams

作　　者：唐扬[1] 邓仲良[2] 吴玉全[2] 孙飞飞[2] 

机构地区：[1]上海市机电设计研究院有限公司,上海200040 [2]同济大学土木工程学院,上海200092

出　　处：《建筑钢结构进展》2010年第3期43-48,共6页Progress in Steel Building Structures

基　　金："十一五"国家科技支撑计划(2006BAJ01B02)

摘　　要：某700吨吊车梁的吊车轨道偏心超过规范允许偏差。本文通过建立有限元模型,分析了轨道偏心对吊车梁受力性能、承载能力的影响,并考虑了跨中垂直度和侧向弯曲矢高两种初始缺陷。分析表明:当偏心不大于腹板厚度时,吊车梁的变形、应力、稳定、极限承载力和疲劳等各项指标均满足设计规范的要求;跨中垂直度初始缺陷对吊车梁的受力性能较为不利;吊车梁上部区域的纵向加劲肋和局部加劲肋可以明显降低该区域的拉应力,有利于避免其出现疲劳破坏现象;轨道偏心对吊车梁的屈曲模态影响很小。Some crane beam for 700t cranes was detected having installation error of rail eccentricity exceeding code limit. Finite element models were established to analyze the influence of rail eccentricity on performance and capacity of the crane beams,considering two types of initial imperfectness,i.e. mid-span verticality and lateral flexural rise. Analytical results show that： with eccentricity no more than the thickness of beam web plate,behavior of the crane beams,including deformation,stress,stability,ultimate capacity and fatigue allowable stress,could satisfy code requirements; mid-span verticality is a more unfavorable initial imperfectness for the crane beams; longitudinal stiffeners and local stiffeners could largely reduce tensile stresses of the upper region of the crane beams and hence avoid its fatigue failure; rail eccentricity has little influence on buckling modes of crane beams.

关 键 词：轨道偏心 吊车梁 疲劳 初始缺陷 

分 类 号：TU318[建筑科学—结构工程]