کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
265691 504323 2016 16 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
ANCOVA-based grouping of bridge classes for seismic fragility assessment
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات مهندسی ژئوتکنیک و زمین شناسی مهندسی
پیش نمایش صفحه اول مقاله
ANCOVA-based grouping of bridge classes for seismic fragility assessment
چکیده انگلیسی


• Grouping of bridge classes for regional risk assessment.
• Identification of significant attribute-related parameters through analysis of covariance.
• Analysis of covariance-based grouping by comparing demands of bridge classes.
• Significant reduction in bridge classes compared to traditional subjective approach.

Fragility curves that can be applicable for vulnerability modeling of various configurations of structures, such as bridges, are required to facilitate regional seismic risk assessment. However, it is cumbersome and time-consuming to develop unique fragility curves for each structure across a regional portfolio. One strategy that has been adopted to address this challenge is to group bridges into classes with similar design or structural performance. Traditionally, this grouping has been performed based on a relatively subjective identification of sub-classes. However, such an identification leads to a number of bridge classes with unwarranted grouping. To overcome this limitation, a new grouping technique based on an analysis of covariance on probabilistic seismic demand models is suggested in this paper. The proposed analysis of covariance based grouping helps to identify important attribute-related parameters and to create distinct bridge sub-classes. The effectiveness of the proposed approach is demonstrated in this paper through case studies of four concrete box-girder bridges in California. This is the first systematic approach to sub-binning bridge classes for the regional risk assessment. The results suggest that the proposed grouping method significantly reduces bridge sub-classes from all possible sub-class combinations. The proposed method is relevant and can be applicable to other bridge types.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Engineering Structures - Volume 123, 15 September 2016, Pages 379–394
نویسندگان
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