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Structural Design under Seismic Risk Using Multiple Performance Objectives

Citation

Irfanoglu, Ayhan (2000) Structural Design under Seismic Risk Using Multiple Performance Objectives. Dissertation (Ph.D.), California Institute of Technology. http://resolver.caltech.edu/CaltechThesis:05052016-115652196

Abstract

Structural design is a decision-making process in which a wide spectrum of requirements, expectations, and concerns needs to be properly addressed. Engineering design criteria are considered together with societal and client preferences, and most of these design objectives are affected by the uncertainties surrounding a design. Therefore, realistic design frameworks must be able to handle multiple performance objectives and incorporate uncertainties from numerous sources into the process.

In this study, a multi-criteria based design framework for structural design under seismic risk is explored. The emphasis is on reliability-based performance objectives and their interaction with economic objectives. The framework has analysis, evaluation, and revision stages. In the probabilistic response analysis, seismic loading uncertainties as well as modeling uncertainties are incorporated. For evaluation, two approaches are suggested: one based on preference aggregation and the other based on socio-economics. Both implementations of the general framework are illustrated with simple but informative design examples to explore the basic features of the framework.

The first approach uses concepts similar to those found in multi-criteria decision theory, and directly combines reliability-based objectives with others. This approach is implemented in a single-stage design procedure. In the socio-economics based approach, a two-stage design procedure is recommended in which societal preferences are treated through reliability-based engineering performance measures, but emphasis is also given to economic objectives because these are especially important to the structural designer's client. A rational net asset value formulation including losses from uncertain future earthquakes is used to assess the economic performance of a design. A recently developed assembly-based vulnerability analysis is incorporated into the loss estimation.

The presented performance-based design framework allows investigation of various design issues and their impact on a structural design. It is a flexible one that readily allows incorporation of new methods and concepts in seismic hazard specification, structural analysis, and loss estimation.

Item Type:Thesis (Dissertation (Ph.D.))
Subject Keywords:seismic design, performance-based design, uncertainty, structural design, earthquake, seismic risk
Degree Grantor:California Institute of Technology
Division:Engineering and Applied Science
Major Option:Civil Engineering
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Beck, James L.
Thesis Committee:
  • Beck, James L. (chair)
  • Hall, John F.
  • Heaton, Thomas H.
  • Iwan, Wilfred D.
  • Jennings, Paul C.
  • Scott, Ronald F.
Defense Date:18 May 2000
Other Numbering System:
Other Numbering System NameOther Numbering System ID
EERL2000-02
Funders:
Funding AgencyGrant Number
CUREe-Kajima Joint Research ProgramUNSPECIFIED
NSFEEC-9701568
NSFBCS-9309149
Harold Hellwig Fellowship in Structural EngineeringUNSPECIFIED
Record Number:CaltechThesis:05052016-115652196
Persistent URL:http://resolver.caltech.edu/CaltechThesis:05052016-115652196
Related URLs:
URLURL TypeDescription
http://resolver.caltech.edu/CaltechEERL:2000.EERL-2000-02Related DocumentTechnical Report EERL 2000-02 in CaltechAUTHORS
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:9702
Collection:CaltechTHESIS
Deposited By: Kathy Johnson
Deposited On:05 May 2016 19:10
Last Modified:05 May 2016 19:10

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