Integrated damping systems for tall buildings: tuned mass damper/double skin facade damping interaction system

<p>From a structural engineering point of view, wind effects pose one of the major challenges to tall buildings. From a performance/architectural point of view, climatologic aspects pose a major challenge. Remedies for each challenge separately have been proposed. One of the remedies for wind effects is the Tunes-Mass-Damper (TMD) or multiple TMD's. To mitigate climatological issues, the Double-Skin-Façade (DSF) has been developed. Recently it has been suggested to take advantage of the space between the two skins of the DSF system to allocate TMD's.</p><p>In this work, another step is taken towards a single remedy for both challenges. A modified version of the TMD-DSF system proposed by Moon (2016) is presented. That is, parts of the mass of the DSF envelope itself are used as part of a multiple TMD (MTMD) system. This is obtained by connecting these parts to the building using springs and dampers while allowing the DSF to move parallel to the floor edges. Furthermore, the DSF-MTMD system is optimized using a formal optimization approach. The optimization indicates which parts of the envelope should be connected to the building rigidly and which should be used as TMD's. Furthermore, the properties of the springs and the dampers are determined by minimizing the cost associated with transforming the DSF system to a DSF-MTMD system and limiting wind responses to desired values.</p>

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Determination of optimal frequency of tuned mass damper for super tall buildings subjected to service level earthquakes

IABSE Congress, Stockholm 2016: Challenges in Design and Construction of an Innovative and Sustainable Built Environment ◽

10.2749/stockholm.2016.0978 ◽

2016 ◽

Author(s):

Lei Zhang ◽

Xinzheng Lu ◽

Qing Jiang ◽

Lieping Ye

Keyword(s):

Tall Buildings ◽

Service Level ◽

Tuned Mass Damper ◽

Optimal Frequency ◽

Mass Damper

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INTEGRATED MULTIPLE TUNED MASS DAMPERS FOR TALL BUILDINGS

Proceedings of International Structural Engineering and Construction ◽

10.14455/isec.res.2014.24 ◽

2014 ◽

Vol 1 (1) ◽

Author(s):

Kyoung Sun Moon

Keyword(s):

Tall Buildings ◽

Axial Stiffness ◽

Tuned Mass Dampers ◽

Study Results ◽

Effective Performance ◽

Double Skin ◽

Reliable Solution ◽

Wind Induced Vibration ◽

Double Skin Facades ◽

Damping Systems

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 façades (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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