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[提要]  對(duì)從意大利拆回的舊吊車梁應(yīng)用于新建車間的可靠性進(jìn)行了分析研究，特別是研究確定了國(guó)內(nèi)非常少見(jiàn)的吊車梁帶帽孔直縫對(duì)焊拼接的疲勞強(qiáng)度和80mm厚板對(duì)疲勞強(qiáng)度的影響。根據(jù)研究結(jié)果提出了補(bǔ)強(qiáng)處理方法，經(jīng)過(guò)補(bǔ)強(qiáng)處理的吊車梁已安全工作了多年。
[關(guān)鍵詞]  吊車梁  可靠性評(píng)估  疲勞強(qiáng)度  對(duì)焊拼接  厚板

For the use of secondhand crane girders from Italy in a workshop, the structural reliability is evaluated, especially the fatigue strength of butt welded splice joint and the effect of 80mm thick plate on fatigue strength are determined. According to the evaluation, strengthening method is presented, and the crane girders strengthened have been used without problem for several years.
Keywords: crane girder; reliability evaluation; fatigue strength; butt welded splice joint; thick plate