Damping models for time history analysis of base isolated buildings

Presentation

When – 15th May 2024

Where – Building 401-439, 20 Symonds Street (University of Auckland Faculty of Engineering). Access from Symonds Street (Refer City Campus Map Link)

Agenda –
17:30 pre-presentation refreshments
18:00 presentation

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Abstract

Modelling viscous damping is a challenging task for base-isolated buildings which consist of two subsystems viz. the isolation system and the superstructure, with substantially different energy dissipation properties.  It is logical to prescribe viscous damping separately for the isolation system and the superstructure, where the use of effective viscous damping in the isolation system can be avoided by using hysteretic models of bearings to account for all the energy dissipation. This presentation discusses the effect of different damping models on the nonlinear seismic response of a base isolated (BI) building under number of ground motions using both direct integration analysis and the fast nonlinear analysis (FNA).

Biography

Ali is a principal structural engineer in WSP, Auckland. He has more than 10 years of experience in designing and nonlinear seismic assessment of small to large scale commercial, residential, retail, and health projects in New Zealand and Middle East using NZ and US codes and standards. He has expertise in low damage seismic systems and nonlinear dynamic analysis. He has PhD in Structural/Earthquake Engineering from University of Canterbury.

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