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1 普通钢屋架设计----------------------------------------------------------------------------
1．1设计资料---------------------------------------------------------------------------------
1．2屋架形式及几何尺寸------------------------------------------------------------------
1．3支撑布置---------------------------------------------------------------------------------
1．4统计荷载---------------------------------------------------------------------------------
1．4．1永久荷载-----------------------------------------------------------------------------
1．4．2可变荷载-----------------------------------------------------------------------------
1．4．3荷载组合-----------------------------------------------------------------------------
1．4．4荷载组合值--------------------------------------------------------------------------
1．4．5屋架内力系数-----------------------------------------------------------------------
1．4．6屋架杆件内力计算-----------------------------------------------------------------
1．5截面选择----------------------------------------------------------------------------------
1．5．1上弦杆--------------------------------------------------------------------------------
1．5．2下弦杆--------------------------------------------------------------------------------
1．5．3斜腹杆--------------------------------------------------------------------------------
1．5．4竖杆-----------------------------------------------------------------------------------
1．6节点连接与焊缝计算-------------