Investigation of seismic action on core walls in high rise buildings

• Main Author: Mah, Peter Ci Hui
• Other Authors: Tan Kang Hai
• Format: Final Year Project
• Language: English
• Published: 2015
• Subjects: DRNTU::Engineering::Civil engineering::Structures and design
• Online Access: http://hdl.handle.net/10356/64124
• Institution: Nanyang Technological University

Seismic actions on high rise buildings are the results of seismic activity in the region in which seismic waves propagate from the source through soil, causing structural instability. The application of horizontal seismic loads on buildings in Singapore is relevant due to the surrounding seismic activity from neighbouring countries. This project aims to investigate the various seismic methods of analysis, determine the effects of various seismic parameters on lateral loads, as well as to establish the most efficient core wall configuration and the factors which contribute to it based on Eurocode design in the context of Singapore. The implementation involves the examination of various simulations using the two different methods for seismic loading determination and the variation of seismic parameters relative to different core wall configurations. Results were obtained from the evaluation of story shear and overturning moment graphs, along with the comparison between base shear forces. The response spectrum method was proven to be more appropriate than the lateral force method, especially so when the building height is large. The core wall configurations were evaluated on their ability to sustain seismic lateral loads with varying seismic parameters and the results were indicative of a relationship between core wall configuration and seismic lateral loadings on a high rise building. Several recommendations for further analysis and the consideration of different parameters were suggested at the end of the report.