Alternative closed-form solutions for the mean rate of exceedance of structural limit states

• Type: Article in International Scientific Journal
• Date: 2013

Authors

Xavier Romão (Author) FEUP; Raimundo Delgado (Author) FEUP; Aníbal Costa (Author) FEUP

Journal

Title: Earthquake Engineering and Structural Dynamics

Vol. 42 No. 12

Pages: 1827-1845

ISSN: 0098-8847

Publisher: Wiley-Blackwell

Indexing

ISI Web of Knowledge - 5 Citations

ISI Web of Science

Scopus - 10 Citations

COMPENDEX

Scientific classification

FOS: Engineering and technology > Civil engineering

Other information

Authenticus ID: P-006-6M5

DOI: 10.1002/eqe.2300

Abstract (EN): Two new closed-form expressions representing the mean rate of exceedance of a given limit state are presented herein. These proposals overcome limitations that were identified with the original formulation of the well-known SAC/FEMA approach. The new expressions involve new parametric functions for the modeling of the seismic hazard data and for the demand evolution for increasing values of the earthquake intensity measure. Given the carefully selected parametric form of these functions, mathematical tractability is able to be maintained to establish two new closed-form solutions representing the mean rate of exceedance of a given limit state. The function proposed for the hazard exhibits nonlinear behavior in log-log space and is able to represent the actual hazard data over a wider range of earthquake intensity levels. The function proposed for the demand evolution addresses issues related to the inadequate performance of the SAC/FEMA approach when force-based demand parameters such as the shear force are considered. To illustrate the applicability of the new closed-form solutions, the probability of occurrence of several limit states is determined for a reinforced concrete structure

Language: English

Type (Professor's evaluation): Scientific