I tried designing a L shaped building(attached imaged) but it has torsional irregularity. How to counteract for that? Details of my material property and sizes are below. The beams(5m span) kept failing how can I design it.
Material: M20 concrete, Fe500 Rebar
Size: Column 500mm*500mm, Beam 500mm*400mm, slab 130mm
Load: Live load 4KN/m^2
Dead: Wall loads (9" and 5")
Staircase load was transferred to beams and lift was modeled in it's place.
The shorter part of "L" shape goes upto 5 stories(one with 5m*5m span) while on longer side(with 3.25 m* 5m) goes upto 4 storey.