| Vol. - No. | Vol.10 - No.2 |
|---|---|
| Date | Jun., 2021 |
| Title | Editor's Note |
| Author |
Hi Sun Choi, P.E. LEED AP |
| Institutions | Senior Principal at Thornton Tomasetti |
| Abstract |
This IJHRB volume features a special issue on "Building Damping Systems" and it is composed of eight papers covering various damping systems from Tuned Mass Damper (TMD), Adaptive TMD, Innovated Liquid Sloshing Damper, Dynamic vibration absorbers (DVAs), Viscoelastic Coupling Dampers (VCDs) as well as seismic energy dissipation devices and seismic damping design considerations contributed by damper experts around the world. Each paper will address their unique damper design approaches and its applications based on experimental and analytical studies as well as field verifications on the performance of their damper design When it comes to tall slender buildings, wind-induced building motion control is a key design element that enables tenant comfort. Thus, a damper is an essential supplementary element in high-rise buildings. J.S. Love and B. Morava's paper features the full-scale performance verification of Dynamic vibration absorbers (DVA), in form of TMD and Tuned Sloshing Damper (TSD), which is commonly used to reduce the wind-induced motion of high-rise buildings. The paper by Chien-Shen Lee, J. S.Love, Trevor C. Haskett and Jamieson K. Robinson present how the combined TSD and TMD models are coupled to the structure to simulate the multi-degree of freedom system response and how they come up with the conclusion that the combined TMD-TSD system is an effective and affordable means to reduce the wind-induced resonant response of tall buildings. Felix Weber, Fatih Yalniz, Deniz Kerner, and Peter Huber present research on Adaptive TMD systems, which is based real-time controlled hydraulic dampers generating purely dissipative control forces. The study shows that the Adaptive TMD requires less mass and space as compared to the passive TMD for the same performance. Kurt Strobel and Victor Salcedo's paper focuses on the meaning and importance of "tuning" amongst other TMD parameters and describes processes to help ensure that an as-built TMD is properly tuned to the as- built high-rise building. An innovative liquid damper system is introduced by Pierre Ghisbain, Sebastian Mendes, Marguerite Pinto, and Elisabeth Malsch. This paper highlights several advantages that the innovative liquid damper system has over traditional pendulum, liquid column or sloshing dampers, including lower fabrication and maintenance costs, modularity, and higher tuning flexibility over a wider range of frequencies based on actual data obtained from the dampers installed on the roof of a 35-story modular building. The paper by Michael Montgomery, Luis Ardila, and Constantin Christopoulos features the applications of SOLID Viscoelastic Coupling Dampers (VCDs) that provide distributed damping that improves the dynamic performance of tall buildings for both wind-storms and earthquakes for all amplitudes of vibration. The VCDs are configured in place of typical structural members in tall buildings and therefore do not occupy any additional architectural space. While the dampers mentioned above are mainly for wind-induced building motion control, with the exception of VCD, the special issue also addresses dampers used for energy dissipation for a seismic event. The paper by Da-Zhu Hu, Xiao-Xuan Zhang, Guo-Qiang Li, Fei-Fei Sun, and Hua-Jian Jin discusses the energy dissipation devices suitable for high-rise buildings. The effectiveness of energy-dissipation technology for reducing the seismic response of high-rise buildings with various structural forms is demonstrated with a number of actual examples of high-rise buildings equipped with various energy dissipation devices. Yozo Shinozaki, Yoshihiro Mogi, Masaaki Ota and Hiroaki Yoshikawa present the design considerations for the Response Controlled Structure using PBD, including selection of the damping system and application of the stiffness & damping to the structures against inertia forces from a dynamic aspect perspective. I would like to thank all of the authors for their contributions to this special issue and sharing their distinctive and valuable research works and latest achievements. I would also like to thank the Chief Editor of IJHRB, Prof. Sang Dae Kim and his staff for all of their support and guidance to incorporate this special issue in this year's edition. |
| Keyword | |
| PP. | PP.1~1 |