轴力及轴力图练习题提示(１）分段计算轴力（可选 A 或Ｂ）A 截面法（切、代、平)Ｂ简捷法（切、代、内力规律得）（2)分段画轴力图注意:①“”上“”下;② ｘ轴与杆件轴线平行对齐;③ 轴力大小分段注明；④ 标清图名和单位[Ｎ图(ｋＮ）]。示例ABC10kN20kN10kNA10kNN111NAB=N1=-10kN(压力)AB10kN20kN22N2NBC=N2=-10+20=10kN(拉力)（1）分段求解轴力（1）分段画轴力图1010N图（kN）练习①(1）分段求轴力(2)分段画轴力图②(1)分段求轴力(2）分段画轴力图ABC10kN20kN30kN1122ABC20kN10kN30kN112240kND33③(1）分段求轴力(2）分段画轴力图④(1）分段求轴力（２）分段画轴力图⑤(1)分段求轴力 (2)分段画轴力图总结：AC30kN112240kND3320kNBABC40kN10kN60kN112240kNE3344D50kNABC100kN150kN1122
