中輕級工作制鋼吊車梁疲勞計算的探討
吳耀華1，何文匯2
- 摘 要
-
吳耀華1，何文匯2（1 中冶建筑研究總院有限公司， 北京 100088； 2 中國京冶工程技術有限公司， 北京 100088）［摘要］針對《鋼結構設計規(guī)范》（GB 50017—2003）中“至于輕級工作制吊車梁和吊車桁架以及大多數中級工作制吊車梁，根據多年來使用的情況和設計經驗，可不進行疲勞計算”的條文說明，對不同鋼材和不同工作級別的吊車梁進行了疲勞計算和比較。結果表明：對中輕級工作制吊車梁，采用Q235和Q345鋼時，可不進行疲勞計算，截面選取由承載力計算控制；采用Q390和Q420鋼時，需要進行疲勞驗算。對于重級工作制的吊車梁，采用Q235,Q345,Q390,Q420鋼時均需要進行疲勞計算。同時還提出了相應的構造措施和鋼材質量等級選用要求，使吊車梁的疲勞計算的范圍和計算內容更為清晰明確。［關鍵詞］吊車梁； 吊車工作制； 疲勞計算中圖分類號：TU391文獻標識碼：A文章編號：1002848X(2013)06001705Exploration on fatigue calculation of light or intermediate duty steel crane beamWu Yaohua1, He Wenhui2(1 Central Research Institute of Building and Construction MCC, Beijing 100088, China;2 China Jingye Engineering Technology Co., Ltd., Beijing 100088, China)Abstract:According to national code Design code for steel structures（GB 50017—2003）commentary: “Based on the performance through long term use and design experience, fatigue calculation is not needed for light level duty crane beam and crane truss and most intermediate duty crane beam”, fatigue performance of crane beams with different steel and different duty level were calculated and compared. The results show that for light or intermediate level duty crane beam, fatigue calculation is not needed when Q235 or Q345 steel is used, because its bearing capacity play the decisive role on this occasion, fatigue calculation is necessary while Q390 or Q420 steel is used; and that for heavy duty crane beam, fatigue calculation is necessary for Q235, Q345, Q390 or Q420 steel. Corresponding construction measures and steel toughness requirements are also proposed at the same time, which makes the scope and content of fatigue calculation of steel crane beam clear.Keywords:crane beam; crane duty level; fatigue calculation作者簡介：吳耀華，碩士，教授級高級工程師，Email：wuyaohua@vip.sina.com。參考文獻［1］GB 50017—2003 鋼結構設計規(guī)范［S］.北京:中國計劃出版社,2003.［2］3SG5201～2 鋼吊車梁［S］.北京： 中國計劃出版社，2003.［3］08SG5203 鋼吊車梁(H型鋼工作級別A1～A5)［S］.北京：中國計劃出版社，2008.［4］05SG5141～4 12m實腹式鋼吊車梁［S］.北京：中國計劃出版社，2005.
