Hybrid damping system for high-rise building outriggers

Recent design of buildings utilizes different strategies to mitigate the lateral displacement and acceleration from wind and earthquake excitation. One of the strategies is to dissipate external energy with dampers. For high-rise buildings, outrigger systems which connect the core and perimeter columns are innovative system, which to combine stiffness of both the core and perimeter columns to resist overturning moment. The bending moment is transferred through shear through the outrigger system. It is an efficient lateral resistance system and an ideal location for building damping systems. However, current damping for outriggers are limited to passive dampers. Although they can mitigate the fundamental vibration mode effectively, their non-adjustable property limits their efficiency. The objective of this thesis is to examine in-depth damping systems for high-rise building outriggers and to investigate the efficiency of hybrid damping system for outriggers. Fundamental dynamic analysis for structures are investigated and presented. Two hybrid damping schemes are discussed in terms of efficiency and performance under earthquake excitation. Finally, a hybrid outrigger damping system is recommended and simulation for a simplified Two Degree of Freedom outrigger with the recommend hybrid damping system are conducted. The results indicate that hybrid-damping outriggers have better performance compared to passive damping system for high-rise building outrigger systems.

Department dc:contributor.department

Massachusetts Institute of Technology. Department of Civil and Environmental Engineering.

Grantor dc:publisher

Massachusetts Institute of Technology

Year dc:date.issued

2014

Author dc:creator

• Feng, Jing, M. Eng. Massachusetts Institute of Technology

Advisor dc:contributor.advisor

• Jerome J. Connor.

• Civil and Environmental Engineering.

Statement dc:rights

• M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission.

Licence dc:rights.uri

• http://dspace.mit.edu/handle/1721.1/7582

Language dc:language.iso

eng

Handle dc:identifier.uri

http://hdl.handle.net/1721.1/90014

OAI identifier oai:identifier

oai:dspace.mit.edu:1721.1/90014