Leaderboard

and it is beacuse when a section is large it attracts higher forces leading to higher reinforcement, leading to higher Mpr, leading to higher end shear at the time of hinging due to earthquake (short span is a major reason of high shear beacuse Vp=(Mpr1+Mpr2)/Ln). and this Probable shear, Vp when becomes higher than 50% of combined shear due to gravity loads and Vp, concrete Vc has to be taken 0, and required steel shear reinforcement to tackle the shear beacomes insufficient, as maybe shear reinforcement cannt be higher than 8*sqrt(f'c)bd.

It was later on found that, short beams under SMRF fail in shear when the section is large. Reducing the section iterativly to reach the optimum section, make things ok. Thanks all for your valuable comments.

Why dont you simply assign insertion point to model this eccentricity? If you are having a frame, You can assign these insertion points to either the beam or the column a per situation? You can offset any end of member (Column or Beam) by this method to model eccentricity. If you are having a frame, and want to model the eccentricity at a specific joint, select the member at that joint (the member which is offest from center lines) and go to assign manu--> Assign insertion Point--> and assign desired offset nd desired axis. But dont forget to uncheck DON'T TRANSFORM STIFFNESS otherwise only geometry will be offset instead of stiffness i.e. required in calculations by the software. If you having only one column, You can also o the same, You want to provide eccentricity. You can either offset your load point as said by sir Rana, or you can offset your column centroidal axis by applying required offset in insertion points in desired axis. again dont forget to uncheck DON'T TRANSFORM STIFFNESS.

W.s Bayan, you should always model node to node. If you don't put beam end on the center of column and that distance is greater than merge tolerence for joints, you will have no load transfer. For cases where beams are placed eccentric to column locations, you can use cardinal points to account for the offset/ eccentricity.