论文部分内容阅读
针对《钢结构设计规范》(GB 50017—2003)中“至于轻级工作制吊车梁和吊车桁架以及大多数中级工作制吊车梁,根据多年来使用的情况和设计经验,可不进行疲劳计算”的条文说明,对不同钢材和不同工作级别的吊车梁进行了疲劳计算和比较。结果表明:对中轻级工作制吊车梁,采用Q235和Q345钢时,可不进行疲劳计算,截面选取由承载力计算控制;采用Q390和Q420钢时,需要进行疲劳验算。对于重级工作制的吊车梁,采用Q235,Q345,Q390,Q420钢时均需要进行疲劳计算。同时还提出了相应的构造措施和钢材质量等级选用要求,使吊车梁的疲劳计算的范围和计算内容更为清晰明确。
For the “Steel Structure Design Code” (GB 50017-2003) “For light-duty crane girder and crane truss and most intermediate working crane beam, based on years of experience and design experience, can not fatigue calculation ”Section states that fatigue calculations and comparisons of crane steams of different steels and working grades. The results show that for Q245 and Q345 steels, the fatigue calculation is not required for the light-duty crane girder, and the selection of cross-section is controlled by the bearing capacity calculation. When using Q390 and Q420 steel, fatigue checking is required. For heavy duty crane girder, the use of Q235, Q345, Q390, Q420 steel fatigue calculations are required. At the same time, the corresponding construction measures and selection requirements of steel quality grade are put forward to make the calculation range and calculation content of crane girder fatigue more clear and definite.