Meet Inspiring Speakers and Experts at our 3000+ Global Conference Series LLC LTD Events with over 1000+ Conferences, 1000+ Symposiums
and 1000+ Workshops on Medical, Pharma, Engineering, Science, Technology and Business.

Explore and learn more about Conference Series LLC LTD : World’s leading Event Organizer

Back

2nd World Congress and Exhibition on Construction and Steel Structure

Las Vegas, USA

Yong jae Lee

Korea University, Korea

Title: Seismic evaluation of the diagrid structure based on the low-to-moderate seismicity region earthquake data

Biography

Biography: Yong jae Lee

Abstract

As the number of the high-rise buildings increase, it shows new trends such as freeform shape (twisted, tapered, tilted). As a structural solution for the new trend buildings, the diagrid structural system was developed that are used in high-rise buildings. Diagrid structural system consist of brace and beam member without vertical columns. So, diagrid structural system is more safety from progressive collapse. When the structure member has damaged, brace-beam structure is more easy to load-transfer than column-beam structure. But it is required to be reviewed for stability of lateral loads, such as wind loads and seismic loads, because it is difficult to investigate the load transfer mechanism of the diagrid nodes due to their combination of various structural members. Because of these problems, FEMA (Federal Emergency Management Agency), proposed to carry out seismic performance evaluation through the IDA (Incremental Dynamic Analysis) for structures such as the diagrid structure. The FEMA P695 method has suggested a 22 earthquake data for performing an IDA. These data are corresponding to the earthquake ground motions in high seismicity regions. However, in the case of low-to moderate seismicity region such as Korea, the effective ground acceleration(s) is under 0.2 g. According to the effective ground acceleration, the Korea region is represented in a low-to-moderate seismicity region. Therefore, the seismic performance evaluation from FEMA method were over-designed. In this paper, the seismic performance of the diagrid structures was evaluated by IDA. IDA was used for 12 earthquake data in a low-to-moderate seismicity region.