Any logical explanation for BMD for 1.3DL + 1.0LL + 1.0RSA-EQ

[Shazeb Mirza]

Can anyone explain that how is there both negative and positive moment at the end of beam at same time ?
Is it some what related to in_plane & out of plane moment at same time ?

 

[Luceid]

RSA generates absolute values results - so when you plot (MAX and MIN) it plots the combinations with the RSA results positive and then with the RSA results negative since RSA does not imply sign (since you do an SRSS combination).

 

[Luceid]

So your single load combo turns into 2 behind the scenes:

1.3DL+1.0LL+ (+RSA)
1.3DL+1.0LL+ (-RSA)