- 摘 要
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幸坤濤1 楊建平2 陳 超3 常好誦2(1 大連理工大學(xué)土建學(xué)院結(jié)構(gòu)研究室 116023; 2 國家工業(yè)建筑診斷與改造工程技術(shù)研究中心 北京 100088; 3 上海寶鋼集團(tuán)上海五鋼有限公司 200940)
[提要] 利用有限元方法對某鋼吊車桁架節(jié)點(diǎn)板進(jìn)行了計(jì)算分析,并與現(xiàn)場實(shí)測應(yīng)力結(jié)果進(jìn)行了對比。在此基礎(chǔ)上,確定了節(jié)點(diǎn)板疲勞計(jì)算應(yīng)力。對鋼吊車桁架的下弦節(jié)點(diǎn)板進(jìn)行了疲勞強(qiáng)度驗(yàn)算,結(jié)果顯示,按擴(kuò)散角計(jì)算節(jié)點(diǎn)板疲勞強(qiáng)度偏于危險(xiǎn)。
[關(guān)鍵詞] 鋼吊車桁架 疲勞強(qiáng)度 擴(kuò)散角The stress of a certain crane truss is analysed by FEM method, and the results of FEM are compared with the test results. The fatigue strength of gusset of bottom chord, which is sensitivity to fatigue, is calculated by FEM method. Fatigue strength checking computations are carried out for this crane truss. It is inclinable to danger when fatigue strength of gusset of this crane truss is calculated by pervasion angle.
Keywords: steel crane truss; fatigue strength; safety control; pervasion angle
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