As Mr Islam and Savoli said you can use of UR3 for extracting the rotation of beam, if it is modeled with Beam element (B31,...). If you modeled the beam as a solid (C3D8,...) member, you can utilize from an average method in center line of the part.
Dear Thant Yin Tun , I m using the C3D8 element as concrete and T3D2 for rebar in RCC but i could not get rotation after analysing .Though i ve selected UR in outputfield.I am using CDP model for concrete. Can you please share with me.