Assessing seismic risks for new and existing buildings using performance-based earthquake engineering (PBEE) methodology - Seismic Risk Analysis and Management of Civil Infrastructure Systems - page 300

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Assessing seismic risks for new and
existing buildings using performance-based
earthquake engineering (PBEE) methodology
T. Y. YA N G, The University of British Columbia, Canada
DOI : 10.1533/9780857098986.3.307
Abstract : Performance-based earthquake engineering (PBEE) aims to
quantify performance of facilities using metrics that are of immediate
use to both engineers and stakeholders. A rigorous yet practical
implementation of a PBEE methodology is presented. The methodology
considers seismic hazard, structural response, resulting damage, and
repair costs associated with restoring the building to its original
condition, using a fully consistent, probabilistic analysis of the associated
parts of the problem. The methodology is demonstrated using an actual
high-rise building designed using three design approaches. The proposed
procedure is consistent with common building design, construction, and
analysis practices such that it can be readily adopted in earthquake
engineering practice today.
Key words : performance-based earthquake engineering (PBEE),
high-rise building design, performance assessment, seismic risk
assessment, life-cycle cost.
12.1 Introduction
Earthquake engineering has evolved from using a set of prescriptive provi-
sions, indirectly aimed at providing life safety, to performance-based
approaches with direct consideration of a range of performance objectives,
such as minimizing the repair cost of the facility under a range of earth-
quake shaking intensities. Performance-based approaches have several
advantages; they offer a more effective way to design structural systems to
achieve higher performance objectives and take into consideration more
comprehensively various performance metrics that allows stake holders to
make informed risk-based decisions. Whereas engineers are familiar with
performance measures such as drift, acceleration, and strain, many decision
makers prefer performance metrics that relate more directly to business
decisions, such as downtime or repair costs. An engineering challenge has
been to consistently consider seismic hazard, structural response, damage,
and consequences, such that a fully probabilistic statement of expected
performance of structures can be made.
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