The distributions of resistive electric field under alternating current transmission and the apparent AC transport losses have been investigated on cylindrically assembled conductors with superconductor tapes through the numerical calculations. Several superconductor tapes with a rectangular cross section of various sizes were arranged on a cylindrical former, in a parallel way to the conductor axis. Numerical calculation of the resistive electric field distributions and the apparent AC transport losses were performed, by taking account of the geometry and the arrangements of tape strands under Bean's critical state model. The influence of the form and arrangement of tape strands on the electric field distributions and the apparent losses is discussed.