Development of a preliminary seismic risk screening tool for existing buildings in Canada

2018 ◽  
Vol 45 (9) ◽  
pp. 717-727 ◽  
Author(s):  
Reza Fathi-Fazl ◽  
Eric Jacques ◽  
Zhen Cai ◽  
Bessam Kadhom ◽  
Bassem Saassouh ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Seismic Performance ◽  
Seismic Design ◽  
Seismic Risk ◽  
Screening Tool ◽  
Existing Buildings ◽  
Seismic Risk Assessment ◽  
Risk Screening ◽  
Categorization System ◽  
Remaining Time

This paper presents a preliminary seismic risk screening tool to identify buildings whose superior structural and non-structural seismic performance in regions of low seismicity can be assessed based on several key attributes. The tool is designed 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. The decisions rendered by the tool regarding the expected seismic performance of a building are evaluated against the next level of seismic risk screening tool to ensure the consistency. A flowchart is presented to facilitate adoption of the tool by practicing engineers and other end-users.

Methodology for seismic risk screening of existing buildings in Canada: Structural scoring system

2021 ◽  
Vol 48 (3) ◽  
pp. 250-262 ◽  
Author(s):  
Reza Fathi-Fazl ◽  
Zhen Cai ◽  
Eric Jacques ◽  
W. Leonardo Cortés-Puentes
Keyword(s):  
Seismic Design ◽  
Scoring System ◽  
Seismic Risk ◽  
Research Council ◽  
Screening Tool ◽  
National Research Council ◽  
Existing Buildings ◽  
Risk Screening ◽  
Existing Building ◽  
Building Characteristics

The National Research Council Canada recently developed a Semi-Quantitative Seismic Risk Screening Tool (SQST) for seismic risk screening of existing buildings in Canada. This paper presents the structural scoring system that is part of the SQST. The structural scoring methodology is based on FEMA P-154, but has been substantially modified to suit Canadian seismicity and seismic design and construction practices. Structural scores are obtained by adding structural basic scores and applicable score modifiers. For an existing building, a structural basic score is determined by calculating the probability of collapse on the basis of a number of assumptions. Then a series of score modifiers are calculated to address the effects of applicable building characteristics on the building’s seismic performance. The structural score is compared with an acceptable structural threshold to determine whether the structural seismic risk is acceptable. The objective of the structural scoring system is to ensure an acceptable and consistent seismic risk in building portfolios while minimizing life safety threats.

SEISMIC RISK ASSESSMENT AND REDUCTION IN ITALY

2019 ◽  
Vol 1 (Special Issue on First SACEE'19) ◽  
pp. 55-75
Author(s):  
Fabio Sabetta
Keyword(s):  
Risk Assessment ◽  
Seismic Risk ◽  
Safety Assessment ◽  
Public Funding ◽  
Tax Incentives ◽  
Technical Training ◽  
Disaster Prevention ◽  
Existing Buildings ◽  
Seismic Risk Assessment ◽  
Post Disaster

In this paper, the main features of the policies adopted in Italy for seismic risk reduction are discussed. Particular attention is given to the Pre-disaster prevention activities such as the implementation of the building code, the seismic risk assessment for a priority scale of intervention, tax incentives and public funding for the vulnerability reduction of the existing buildings, information to population and school education, technical training of experts. The phases of response and post-disaster activities, including emergency management, search and rescue, loss scenarios, and safety assessment of buildings, are also discussed taking example from the most recent devastating earthquakes in Italy (L.Aquila 2009, Amatrice 2016).

Spatial Cross-Correlation Models for Absolute and Relative Spectral Input Energy Parameters Based on Geostatistical Tools

2020 ◽  
Vol 110 (6) ◽  
pp. 2728-2742
Author(s):  
Yin Cheng ◽  
Chao-Lie Ning ◽  
Wenqi Du
Keyword(s):  
Risk Assessment ◽  
Seismic Design ◽  
Seismic Risk ◽  
Cross Correlation ◽  
Cumulative Damage ◽  
Input Energy ◽  
Seismic Risk Assessment ◽  
Linear Model Of Coregionalization ◽  
Energy Parameters ◽  
Correlation Models

ABSTRACT In recent years, energy-based seismic design methodology has received increasing attention because it takes into account not only the force and displacement behavior of a structure but also the cumulative damage effect caused by seismic loading. Specifically, as a fundamental parameter, input energy parameters (both absolute and relative measures) are directly related to the cumulative damage potential; therefore, they are commonly used in energy-based seismic design and seismic risk assessment. This study thus proposes new spatial cross-correlation models for absolute and relative elastic input energy parameters, using 2219 ground-motion records selected from 12 earthquake events. The normalized within-event residuals for both absolute and relative measures are first calculated. Semivariogram analysis is then conducted to quantify the spatial correlation of residuals for the input energy parameters at multiple sites and multiple periods. The linear model of coregionalization (LMC) approach is adopted to fit the empirical data; it is observed that the proposed LMC-based function performs reasonably well in capturing the spatial variability of the input energy measures. The influence of regional site conditions on the spatial cross correlation of input energy parameters is also investigated, and generic models are proposed using the averaged standardized coregionalization matrices of 12 events. The spatial cross-correlation models developed for input energy parameters can be used in regional seismic risk assessment within an energy-based framework.

Methodology for seismic risk screening of existing buildings in Canada: Non-structural component scoring system

2021 ◽  
Vol 48 (3) ◽  
pp. 263-273
Author(s):  
W.L. Cortés-Puentes ◽  
Z. Cai ◽  
R. Fathi-Fazl
Keyword(s):  
Structural Component ◽  
Scoring System ◽  
Seismic Risk ◽  
Screening Tool ◽  
National Research Council ◽  
Existing Buildings ◽  
Structural Components ◽  
Risk Screening ◽  
Threshold Score ◽  
Critical Components

The National Research Council of Canada (NRC) has recently developed a Semi-Quantitative Seismic Risk Screening Tool (SQST) to supersede the 1993 NRC Manual for Screening of Buildings for Seismic Investigation. The proposed screening tool incorporates a methodology for estimating global seismic risk of existing buildings associated with failure of their non-structural components. The methodology assesses global seismic risk using a qualitative yet comprehensive scoring system. The scoring system consists of a global non-structural component score and acceptable threshold scores. The global score is based on the most critical components. It combines a basic score with score modifiers for key parameters affecting the seismic response of non-structural components. The acceptable threshold score is based on the building’s consequence of failure, the building’s importance category, and the component factor. The scoring system is calibrated to be consistent with the seismic risk acceptance criteria previously developed for preliminary seismic risk screening of existing buildings, based on Canadian seismicity, building age, remaining occupancy time, and consequences of failure.

Semi-quantitative seismic risk screening tool for existing buildings in Canada

2022 ◽  
Author(s):  
Reza Fathi-Fazl ◽  
ZHEN CAI ◽  
W. Leonardo Cortés-Puentes ◽  
Farrokh Fazileh
Keyword(s):  
Scoring System ◽  
Seismic Risk ◽  
Screening Tool ◽  
National Research Council ◽  
Seismic Demand ◽  
Allocation Of Resources ◽  
Existing Buildings ◽  
Structural Components ◽  
Risk Screening ◽  
Web Based

The National Research Council Canada (NRC) recently developed a semi-quantitative seismic risk screening tool (SQST) for existing buildings in Canada. The SQST aims to supersede the Manual for Screening of Buildings for Seismic Investigation developed by NRC in the early 1990s. The SQST consists of three key components: (1) a structural scoring system that quantitatively assesses the structural seismic risk based on probability of collapse; (2) a non-structural component scoring system that qualitatively assesses the seismic risk of non-structural components based on seismic demand; and (3) a ranking procedure that prioritizes potentially hazardous buildings for seismic evaluations and possible upgrading. The SQST intends to inexpensively identify and exempt buildings with acceptable life safety risk and optimize the allocation of resources to assess the seismic risk of portfolios of buildings. Seismic screening with the SQST can be completed with either paper-based screening forms or a web-based application. The applicability of the SQST is demonstrated by conducting a pilot study for 33 existing buildings across Canada.

SEISMIC RISK ASSESSMENT AND MITIGATION FOR THE EXISTING LIFELINE

2011 ◽  
Vol 05 (01) ◽  
pp. 31-45 ◽  
Author(s):  
T. IMAI ◽  
S. WADA ◽  
T. KOIKE
Keyword(s):  
Risk Assessment ◽  
Seismic Risk ◽  
Water Distribution ◽  
Water Distribution Network ◽  
Assessment Method ◽  
Disaster Mitigation ◽  
Seismic Retrofitting ◽  
Network System ◽  
Investment Strategies ◽  
Seismic Risk Assessment

In order to keep the existing lifeline network system at a favorable seismic performance level, it is necessary to carry out retrofitting activities. This study proposes a seismic risk assessment method for the existing deteriorated lifeline network system based on the probability of system performance failure. Numerical simulations are carried out for the existing water distribution network system for several seismic investment strategies to support the decision making of seismic disaster mitigation planning. Effective planning of seismic retrofitting activities and disaster mitigation for the existing lifeline system can be realized using the newly developed assessment method.

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