ASEA SEC 02


INTEGRATED MULTIPLE TUNED MASS DAMPERS FOR TALL BUILDINGS

KYOUNG SUN MOON


Abstract

As tall buildings become taller and more slender, wind-induced vibration is a serious design issue. Installing auxiliary damping devices, such as tuned mass dampers (TMD), is a very reliable solution. TMDs are usually large and located near the top of tall buildings for their effective performance. As a result, very valuable occupiable space near the top of tall buildings is sacrificed to contain large TMDs, and installing TMD systems results in adding additional masses to tall buildings. In order to address these issues, more integrated TMD systems for tall buildings are studied. First, distributing multiple small TMDs to multiple upper floors of tall buildings is investigated. The study results suggest this can be done without substantial loss of the effectiveness of the system. Second, designing existing masses in tall buildings to provide damping mechanism is studied. An emphasis is placed on studying the potential of double skin fa├žades (DSF) as an integrated damping system. For this, the connectors between the inner and outer skins of the DSF system are designed to have very low axial stiffness, and the outer skin masses of the DSF system is utilized as damping mass. Wind-induced vibration of tall building structure can be substantially reduced through this design. Finally, TMD/DSF interaction system is studied to synergistically enhance the performance of the TMD and DSF damping systems.

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