Work

Seismically induced torsional amplification in limited ductile buildings

Year: 2024

Type: article

Abstract: This article deals with the seismic demand on limited ductile buildings featuring plan asymmetry. When the yielding occurs in a structural wall positioned at the edge of the building remote from the centre of resistance (CR), the position of the CR would shift even further away from the wall, causing an additional, and momentarily, increase in torsion. The undesirable shift in the position of the CR is usually shortlived and would reverse as other walls in the building also surpass the yield limit. However, the limited ductile construction (typical of low to moderate seismicity regions) can be vulnerable. This additional amplification in torsion can only be captured by Incremental Dynamic Analyses (IDA), but not by elastic analyses nor by nonlinear analyses of high ductility demand. Thus, the phenomenon as described is not widely known in spite of torsion being a well researched topic. In this study, parametric studies employing IDA of limited ductile buildings of different structural configurations were undertaken to capture the trends and develop recommendations for guiding structural design.

Source: Structures

DOI: 10.1016/j.istruc.2024.107485

Authors: Yao Hu, Elisa Lumantarna, Nelson Lam, Hing-Ho Tsang

Institutions: The University of Melbourne, University of Dundee

Language: English

Topic: Seismic Performance and Analysis

Subfield: Civil and Structural Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,160

Funder: University of Melbourne