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New Ideas for Modelling Energy Dissipation: Moving Beyond the Limitations of Rayleigh Damping – Christchurch and Online
24 October 2024 @ 5:30 pm - 7:00 pm
Beca, ANZ Centre, Level 2, 267 High St Christchurch 8011* | Online
In the time history analysis of nonlinear large-scale structures subjected to seismic loading, engineers often rely on the Rayleigh damping model, due to its simplicity and computational efficiency, for modelling energy dissipation that is not already accounted for by hysteretic material models. However, this model has notable limitations, such as difficulty in accurately matching damping across multiple vibration modes and the introduction of unintended damping forces, which can compromise the accuracy of structural design under seismic loads. These issues can result in underestimating seismic demands, leading to unconservative designs.
This seminar will explore how new ideas can be incorporated into damping models to improve the reliability of seismic time history analysis. We will demonstrate how new methods can overcome the shortcomings of traditional approaches like Rayleigh damping, particularly in simulating inelastic energy dissipation during extreme seismic events. Attendees will gain insights into practical strategies for enhancing structural analysis, with examples highlighting real-world applications in seismic design.
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Dr Chin Long Lee 
Dr Chin-Long Lee is an Associate Professor at the University of Canterbury with extensive expertise in the field of structural engineering. He earned his PhD from the University of California, Berkeley, and has since made significant contributions to the development of advanced computational tools for the nonlinear analysis of large-scale structures under seismic loading. Chin-Long’s recent work focuses on creating robust damping models that enhance the accuracy and efficiency of energy dissipation simulations in large-scale structures, addressing a critical need for high-performance computational methods.
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*For those attending the meeting, the main door to the ANZ Centre is locked after 5 pm. Please enter the ANZ Centre through the side door of Mugen Sushi on 265 High Street. Then proceed to lifts and head up to Level 2 (Beca Office). The lifts will be open until 6 pm. Please arrive on time.
