Load and resistance factors for prestressed concrete girder bridges
| العنوان: | Load and resistance factors for prestressed concrete girder bridges |
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| المؤلفون: | Olga Iatsko, Andrzej S. Nowak |
| المصدر: | Budownictwo i Architektura, Vol 19, Iss 3 (2020) |
| بيانات النشر: | Politechnika Lubelska, 2020. |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | lcsh:T55.4-60.8, 0211 other engineering and technologies, 020101 civil engineering, 02 engineering and technology, resistance factor, Standard deviation, 0201 civil engineering, law.invention, lcsh:Architectural engineering. Structural engineering of buildings, Prestressed concrete, law, Girder, 021105 building & construction, Calibration, reliability index, lcsh:Industrial engineering. Management engineering, Point (geometry), Reliability (statistics), bridge live load, lcsh:NA1-9428, Mathematics, business.industry, Statistical parameter, General Medicine, Structural engineering, Resistance Factors, prestressed concrete girders, lcsh:TA1-2040, lcsh:TH845-895, design point, design formula, lcsh:Architecture, lcsh:Engineering (General). Civil engineering (General), business |
| الوصف: | There has been a considerable progress in the reliability-based code development procedures. The load and resistance factors in the AASHTO bridge design code were determined using the statistical parameters from the 1970's and early 1980’s. Load and resistance factors were determined by first fixing the load factors and then calculating resistance factors. Load factors were selected so that the factored load corresponds to two standard deviations from the mean value and the resistance factors were calculated so that the reliability index is close to the target value. However, from the theoretical point of view, the load and resistance factors are to be determined as coordinates of the so-called “design point” that corresponds to less than two standard deviations from the mean. Therefore, the optimum load and resistance factors are about 10% lower than what is in the AASHTO LRFD Code. The objective of this paper is to revisit the original calibration and recalculate the load and resistance factors as coordinates of the “design point” for prestressed concrete girder bridges. The recommended new load and resistance factors provide a consistent reliability and a rational safety margin. |
| تدمد: | 2544-3275 1899-0665 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::439418a1f426bb62235aa145a311e7a3 https://doi.org/10.35784/bud-arch.2120 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....439418a1f426bb62235aa145a311e7a3 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 25443275 18990665 |
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