求如图所示各梁的支座反力 60
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解答楼主圈出的(a)图题目:
ΣFx =0, FAx =0
ΣFy =0, FAy -(2KN/m).2m =0
FAy =4KN(向上)
ΣMB =0, MA -4KN.4m +(2KN/m).2m.1m -10KN.m =0
MA =22KN.m(逆时针绕向)
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解答楼主圈出的(b)图题目:
ΣFx =0, FAx +1KN.cos60 =0
FAx = -0.5KN(向左)
ΣMB =0, -FAy.4m -2KN.m -1KN.sin60.2m =0
FAy = -0.933KN(向下)
ΣMA =0, FBy.4m -2KN.m -1KN.sin60.6m =0
FBy =1.799KN(向上)
ΣFx =0, FAx =0
ΣFy =0, FAy -(2KN/m).2m =0
FAy =4KN(向上)
ΣMB =0, MA -4KN.4m +(2KN/m).2m.1m -10KN.m =0
MA =22KN.m(逆时针绕向)
.
解答楼主圈出的(b)图题目:
ΣFx =0, FAx +1KN.cos60 =0
FAx = -0.5KN(向左)
ΣMB =0, -FAy.4m -2KN.m -1KN.sin60.2m =0
FAy = -0.933KN(向下)
ΣMA =0, FBy.4m -2KN.m -1KN.sin60.6m =0
FBy =1.799KN(向上)
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