Displacement and acceleration control for buildings under random excitation models

This paper discusses a numerical method for redesigning stiffer shear-type structures. The dy-namic response control of the building model is obtained by means of simultaneous optimization of stiffnessand damping. The numerical algorithm seeks a solution by minimizing the sum of mean-square interstoreydrifts to stationary random excitations. The algorithm includes two consecutive phases: in the first phase thetotal storey stiffness and the total damper capacity are kept constant, whereas inthe second phase the increase of total damping determines the acceleration control of the top floor. A 2-dof shear-type model subjected to aseismic excitation is used to show the efficiency and applicability of the presented method.