Abstract
Theoretical studies are presented on the elastic behavior of a high-rise building with shear walls using elementary beam thory. The shear wall is modeled to a bar subjected to bending and shearing deformations, and moment resisting frames are approximated as beams subjected to shearing deformations. The shear wall and moment resisting frames are coupled by connecting beams. Deformations are obtained as the solution of ordinary differential equation. The influence of the connecting beam rigidity to the deformation of the system can be investigated by simple tools like the spread-sheet software. The bending deformations of the braced wall of steel structures are reduced by the restraining trusses, so called Hat-Truss or Belt-Truss. Effects of restraining trusses are also investigated.