Discussion of “Seismic Performance Evaluation of Pre-Northridge Steel Frame Buildings with Brittle Connections” by Kihak Lee and Douglas A. Foutch

Abstract:The collapses of building structures during recent earthquakes have raised many questions regarding the adequacy of current seismic provisions to prevent a partial or total collapse. They have also brought up questions as to how to determine the collapse safety margin of structures, what is the inherent collapse safety margin in code-designed structures, and how to strengthen structures to effectively augment such margin. The purpose of this paper is to present a comprehensive review of the analytical methods that are currently available to assess the capacity of building structures to resist an earthquake collapse, point out the limitations of these methods, describe past experimental work in which specimens are tested to collapse, and identify what is required for an accurate evaluation of the seismic collapse capacity of a structure and the safety margin against such a collapse. It is contended that further research is needed before the collapse capacities of structures and their safety margin against collapse may be evaluated with confidence.

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The Role of Fragility Assessment in Consequence-Based Engineering

Wen

Ellingwood

2005

Earthquake Spectra

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Concepts of uncertainty modeling and fragility assessment in earthquake engineering and their applications in consequence-based engineering (CBE) of buildings in a region of low-to-moderate seismicity are presented. Efficient treatment of uncertainties in components and systems that are major contributors to building vulnerability is an essential ingredient of risk assessment and decision making. Current methodologies are reviewed first. A framework for fragility analysis then is demonstrated using an unreinforced masonry building as an example. The importance of fragility analysis in various stages of risk assessment, loss estimation, and decision making in CBE to achieve the desirable long-term objective in reduction of loss and consequence with the most efficient intervention measures is clearly indicated. Current research issues related to vulnerability assessment are identified.

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Discussion of “Seismic Performance Evaluation of Pre-Northridge Steel Frame Buildings with Brittle Connections” by Kihak Lee and Douglas A. Foutch

Cited by 3 publications

References 3 publications

The seismic vulnerability assessment methodologies: A state-of-the-art review

The seismic vulnerability assessment methodologies: A state-of-the-art review

Methods to Assess the Seismic Collapse Capacity of Building Structures: State of the Art

The Role of Fragility Assessment in Consequence-Based Engineering

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