Modeling Analysis

Seismic risk decision framework for existing buildings in Canada

Preliminary Seismic Risk Screening Tool A preliminary seismic risk screening tool was developed to exempt buildings from detailed seismic risk assessment if key exemption criteria are met. The exemption criteria are based on: a seismic categorization system linked to anticipated building damage and seismicity; whether or not the building was designed using modern seismic design provisions; and the remaining time that the building will be occupied. The tool also provides a second list of criteria, which if satisfied, will automatically trigger further detailed seismic risk assessment.

Data-driven historical assessment of terrorist trends and metrics

This study applied advances in big data and visual data analytics to the field of protective design. A database of historical terrorist activities was analyzed using the Tableau visual data analytics software package to identify meaningful trends in historical data and demonstrate sensitivity of assets to particular types of terrorist attacks by non-state actors based on key geographic, socioeconomic, and contextual characteristics. The research will support improvements to existing terrorism risk methodologies leading to cost-effective, risk-informed decisions to identify the most vulnerable buildings in a large portfolio of buildings.

Compression Membrane Arching Analysis of Reinforced Concrete

An analytical procedure was developed to generate the load-deformation characteristics of laterally restrained reinforced concrete members, a phenomenon commonly referred to as compression membrane arching action.

Blast Vulernability Assessment

A blast vulnerability assessment of major structural components of the East Block of Parliament Hill was performed. The objective was to establish a preliminary estimate of structural vulerability to multiple external blast scenarios. Approximately 60 resistance curves, and pressure-impulse (PI) diagrams were generated for the entire exterior of the structure. The exterior walls were discretized into seven common wall types, considering typical offices, towers, entrance ways, senate chambers, and any other unusual structural configuration. Each wall type was further subdivided by storey level, which affects axial load. The out-of-plane blast resistance of the walls was analyzed using both a one-way and two-way flexural approach.