Presentation Title

Architected Materials for Seismic Isolation of Civil Infrastructure

Start Date

November 2016

End Date

November 2016

Location

HUB 265

Type of Presentation

Oral Talk

Abstract

The resiliency of communities in seismic regions heavily relies on the highway infrastructure. Among the current retrofit technologies for deficient highway bridges, seismic isolation is more effective than traditional systems in reducing the risk of loss of functionality after major shaking events. Seismic isolation is based on the idea that it is possible to decouple a structure from the ground with an isolation layer, thus drastically reducing the seismic vibration energy transmitted to the structure and avoiding damages. The high bearing capacity and lateral deflection capability of the isolation layer are provided by expensive isolation devices. Architected materials were recently patented to be used as an alternative to traditional isolators. These man-made materials are affordable and can provide optimal seismic isolation properties. For this research I investigated the effects of using an architected material for the seismic isolation of an existing bridge. With this aim I performed nonlinear time-history analyses of the bridge with and without seismic isolation. Results show that the material is effective in reducing damage and failure probabilities by 89% and 45%, respectively.

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Nov 12th, 11:30 AM Nov 12th, 11:45 AM

Architected Materials for Seismic Isolation of Civil Infrastructure

HUB 265

The resiliency of communities in seismic regions heavily relies on the highway infrastructure. Among the current retrofit technologies for deficient highway bridges, seismic isolation is more effective than traditional systems in reducing the risk of loss of functionality after major shaking events. Seismic isolation is based on the idea that it is possible to decouple a structure from the ground with an isolation layer, thus drastically reducing the seismic vibration energy transmitted to the structure and avoiding damages. The high bearing capacity and lateral deflection capability of the isolation layer are provided by expensive isolation devices. Architected materials were recently patented to be used as an alternative to traditional isolators. These man-made materials are affordable and can provide optimal seismic isolation properties. For this research I investigated the effects of using an architected material for the seismic isolation of an existing bridge. With this aim I performed nonlinear time-history analyses of the bridge with and without seismic isolation. Results show that the material is effective in reducing damage and failure probabilities by 89% and 45%, respectively.