這種外伸梁A,B的支座反力怎麼計算!請儘量詳細點,
題目:
這種外伸梁A,B的支座反力怎麼計算!請儘量詳細點,
解答:
ΣMa =0,-(2kN/m)x(4m)x(4m/2) +(Fby)x4m +6kNm -5kNx6m =0
Fby = 10kN(向上)
ΣFy =0,Fay -(2kN/m)x(4m) +10kN -5kN =0
Fay = 3kN (向上)
ΣFx =0,Fax +0 =0
Fax = 0
驗算:
ΣMb =0,-(Fay)x4m +(2kN/m)x(4m)x(4m/2)+6kNm -5kNx2m =0
Fay = 3kN (向上),與用ΣFy =0方程計算結果相同.
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