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A cantilever beam of span 2.5m carries three point loads of 1kN, 2kN, and 3kN at 1m, 1.5m, and 2.5m from the fixed end. Draw S.F.D. and B.M.D.
1 Answer
written 5.6 years ago by |
I. To calculate reaction at support A
ΣFy=0
RA−1−2−3=0
RA=6kN
II. SF calculation:
SFatA=+6kN
CL=+6kN
CR=+6−1=5kN
DL=+5kN
DR=+5−2=3kN
BL=+3kN
B=+3−3=0(∴ok)
III. BM calculation:
BM at B=0∵B is free end. D=−3×1=−3kN−mC=−3×1.5−2×0.5=−5.5kN−mA=−3×2.5−2×1.5−1×1=−11.5kN−m