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Seismic risk to major industrial facilities

Kiremidjian,Anne S., Ortiz,Keith, Nielsen,Richard J., Safavi,Bahram

Sayı: CEE-8116997, 1985

The overall goal of this study is to develop a general methodology for seismic risk evaluation at major industrial facilities. This report focuses on the first of these aspects of the general risk methodology, methods for estimating the damage to structures and equipment. Existing methods for evaluating the performance of structures at major industrial facilities when subjected to earthquake ground motion are reviewed, using the advanced first-order reliability approach. The main advantages of this approach are that reliability computations are mathematically invariant and uncertainties included in the analysis relate to physical parameters which can be quantified more readily. Simplified formulations for the limit state equations are presented which can be standardized for classes of structures with similar design configurations. The methods for failure probability (or reliability) estimates are illustrated through specific examples. For application purposes, typical structures at oil refineries are identified. Reliability estimates are obtained specifically for tall isomerization columns of uniform and nonuniform cross sections. Various degrees of complexity are introduced in the structural response formulations to assess the adequacy of the simplified approach.

The John A. Blume Earthquake Engineering Center, Stanford University

California, USA

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