Structural control of RC buildings subjected to near-fault ground motions in terms of tuned mass dampers

Abstract

To design a proper structure against earthquake in modern systems, control systems are of special importance. An added passive Tuned Mass Damper (TMD) is one of such systems, which will be discussed in this paper. In this regard, the effect of adding this damper to a 10-oor concrete structure under six near-fault earthquakes is investigated. To do this, a code has been written in MATLAB that receives the ground motion record of occurring earthquake as well as the structural speci cations such as a matrix of mass, sti ness, and damping as an input. As outputs, a time-history of responses for the top oor, a diagram for the oor displacement, and drift of the structure at the time that the top oor has reached the maximum displacement are presented. In addition, these diagrams are compared both when the added damper is present and absent. It is observed that the added passive control of TMD is highly effective in the reduction of structure response against earthquake, which in turn depends on the properties of the earthquake and, therefore, should be chosen based on the site seismic conditions.