目 录 1、设计资料 .................................................................................................................................... 1 2、屋架形式及几何尺寸................................................................................................................. 1 3、材料选择及支撑布置................................................................................................................. 2 4、荷载和内力计算 ........................................................................................................................ 3 （1）荷载计算 ........................................................................................................................ 3 （2）荷载组合 ........................................................................................................................ 3 （3）内力计算 ........................................................................................................................ 4 5、杆件截面选择 ............................................................................................................................ 4 （1）上弦 ................................................................................................................................ 5 （2）下弦 ................................................................................................................................ 6 （3）腹杆 ................................................................................................................................ 6 <1> 杆件13 及16 ................................................................................................................... 6 <2> 杆件11 及14 ................................................................................................................... 7 <3> 杆件12 及15 ................................................................................................................... 8 <4...
