A.60kN,40kN,-25kN B.60kN,40kN,25kN C.-

资格题库2022-08-02  11

问题 A.60kN,40kN,-25kNB.60kN,40kN,25kNC.-60kN,-40kN,25kND.-60kN,-40kN,-25kN

选项 A.60kN,40kN,-25kN
B.60kN,40kN,25kN
C.-60kN,-40kN,25kN
D.-60kN,-40kN,-25kN

答案 B

解析 用截面法求l杆和2杆的内力,最后取节点 A求S3。
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