Seismic Response Control Performance Evaluation of Tuned Mass Dampers for a Retractable-Roof Spatial Structure
- PDF / 4,120,185 Bytes
- 12 Pages / 595.276 x 790.866 pts Page_size
- 73 Downloads / 236 Views
Online ISSN 2093-6311 Print ISSN 1598-2351
Seismic Response Control Performance Evaluation of Tuned Mass Dampers for a Retractable‑Roof Spatial Structure Young‑Rak Lee1 · Hyun‑Su Kim2 · Joo‑Won Kang3 Received: 30 April 2020 / Accepted: 16 October 2020 © Korean Society of Steel Construction 2020
Abstract Choosing the installation location of a tuned mass damper (TMD) is the most important factor to consider when controlling dynamic response of a structure. It is also necessary to study whether the mass of the TMD installed on the structure effectively reduces the seismic response to the dynamic load. This study investigates the control performance of a seismic load was using a TMD installed on the spatial structure of a retractable roof. The optimum mass ratio and installation location of the TMD were analyzed. The mass of one TMD was set as 1% of the total mass of the analytical model. One TMD mass was fixed, and the optimal position was examined by changing the number of TMDs installed. The displacement response ratio of the model with the TMD was compared to that of a base model without the TMD. The numerical analysis results showed that the displacement responses of the example structure with 8 TMDs were reduced by about 90% compared to the uncontrolled case. The TMDs were most effective when they were installed at the edge rather than concentrated at the center of the spatial structure. After selecting three analytical models that were most effective, we tried to reduce the mass ratio of one TMD to find the optimal one. Using the optimum mass ratio, the TMD mass ratios differed according to the truss position. The analysis results could be used as a reference in TMD design for large space structures. Keywords Retractable roof · Spatial Structure · Tuned mass damper · Seismic response control · TMD installation position · Dynamic response reduction
1 Introduction The frequency of earthquakes continues to increase worldwide, and Korea has also experienced a sharp increase in earthquakes since 2016. Earthquakes with magnitude greater than M4.0 (Richter magnitude scale) have occurred about 50 times since 2017, and many smaller earthquakes have occurred. In Korea, a series of M5.1 and M5.8 earthquakes occurred in Gyeongju on September 12, 2016, an earthquake of magnitude M5.8 occurred in Pohang on November 15, 2017, and several large and small aftershocks occurred more than 150 times (Lee et al. 2018). Thus, Korea is no longer a * Joo‑Won Kang [email protected] 1
Department of Architecture, Yeungnam University, Gyeongsan‑si, Korea
2
Division of Architecture, Sunmoon University, Asan‑si, Korea
3
School of Architecture, Yeungnam University, Gyeongsan‑si, Korea
safe zone for earthquakes in terms of frequency and scale, and it is expected that large earthquakes will occur (Lee et al. 2007). A large space structure has a large capacity to accommodate a large number of people, so it is expected to cause great casualties in the case of earthquake damage (Kawaguchi and Suzuki 2005). Therefore, guidelines fo
Data Loading...
