Abstract
The trend of adopting architectural designs with irregularities in elevation, meaning that the shape of the building is irregular, is on the increase. Seismically deficient structures are found in abundance in developing countries such as Pakistan, and structures with irregularities in elevation may result in failures due to sudden changes in stiffness, mass or strength along the building height. The aim of the work reported in this paper was to develop analytical seismic vulnerability curves for deficient mid-rise reinforced concrete building frames with setbacks. The vulnerability curves were derived by adopting a framework used in a previous study. Along with a regular frame, six-storey frames with different setback configurations were considered. The frames were modelled using the numerical analysis program Drain-3DX and their responses were estimated by generating force–displacement envelopes using non-linear static analysis. The response spectrum of the Uniform Building Code was used to impose a seismic demand. The hazard levels were evaluated at every point of the capacity envelope using a reverse procedure of Fema 440. The damage in the studied building frames was quantified through a direct correlation with the natural period of vibration of the buildings, as suggested in previous studies. The developed vulnerability curves showed brittle failure modes in seismically deficient buildings.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
More From: Proceedings of the Institution of Civil Engineers - Structures and Buildings
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.