Cargando…
Reliability Analysis of CFRP-Strengthened RC Bridges Considering Size Effect of CFRP
A reliability analysis of an existing structure and a carbon fiber-reinforced plastic (CFRP)-strengthened structure is commonly used to evaluate the effectiveness of strengthening. It also provides the basis for the calibration of the partial factors involved in strengthening design codes. As the fu...
Autores principales: | , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2019
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6678657/ https://www.ncbi.nlm.nih.gov/pubmed/31336887 http://dx.doi.org/10.3390/ma12142247 |
_version_ | 1783441153069154304 |
---|---|
author | Xie, Hui-Bing Wang, Yuan-Feng |
author_facet | Xie, Hui-Bing Wang, Yuan-Feng |
author_sort | Xie, Hui-Bing |
collection | PubMed |
description | A reliability analysis of an existing structure and a carbon fiber-reinforced plastic (CFRP)-strengthened structure is commonly used to evaluate the effectiveness of strengthening. It also provides the basis for the calibration of the partial factors involved in strengthening design codes. As the fundamental data, the statistical characteristics of the CFRP tensile strength affect the evaluation result. In general, the statistical characteristics of the CFRP strength were obtained from laboratory experiments with small-scale specimens, which resulted in errors caused by the size effect. In this study, a probabilistic series-parallel model is developed to describe the size effect of CFRP. The CFRP fabric is divided into a set of representative volume elements. By numerically simulating the CFRP strength, the relationship between the number of representative volume elements and the mean and coefficient of variation (COV) of the CFRP strength is analyzed. A chi-square test is carried out to determine the distribution type of the CFRP strength. An analytical expression of the mean, COV, and the cumulated density function of the CFRP strength are derived. Finally, an existing bridge, which has operated for 41 years, is selected for the case study; it is strengthened by using CFRP fabric. Reliability indexes of the existing and the strengthened bridges are calculated to analyze the size effect on the reliability of the strengthened structure. |
format | Online Article Text |
id | pubmed-6678657 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-66786572019-08-19 Reliability Analysis of CFRP-Strengthened RC Bridges Considering Size Effect of CFRP Xie, Hui-Bing Wang, Yuan-Feng Materials (Basel) Article A reliability analysis of an existing structure and a carbon fiber-reinforced plastic (CFRP)-strengthened structure is commonly used to evaluate the effectiveness of strengthening. It also provides the basis for the calibration of the partial factors involved in strengthening design codes. As the fundamental data, the statistical characteristics of the CFRP tensile strength affect the evaluation result. In general, the statistical characteristics of the CFRP strength were obtained from laboratory experiments with small-scale specimens, which resulted in errors caused by the size effect. In this study, a probabilistic series-parallel model is developed to describe the size effect of CFRP. The CFRP fabric is divided into a set of representative volume elements. By numerically simulating the CFRP strength, the relationship between the number of representative volume elements and the mean and coefficient of variation (COV) of the CFRP strength is analyzed. A chi-square test is carried out to determine the distribution type of the CFRP strength. An analytical expression of the mean, COV, and the cumulated density function of the CFRP strength are derived. Finally, an existing bridge, which has operated for 41 years, is selected for the case study; it is strengthened by using CFRP fabric. Reliability indexes of the existing and the strengthened bridges are calculated to analyze the size effect on the reliability of the strengthened structure. MDPI 2019-07-12 /pmc/articles/PMC6678657/ /pubmed/31336887 http://dx.doi.org/10.3390/ma12142247 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Xie, Hui-Bing Wang, Yuan-Feng Reliability Analysis of CFRP-Strengthened RC Bridges Considering Size Effect of CFRP |
title | Reliability Analysis of CFRP-Strengthened RC Bridges Considering Size Effect of CFRP |
title_full | Reliability Analysis of CFRP-Strengthened RC Bridges Considering Size Effect of CFRP |
title_fullStr | Reliability Analysis of CFRP-Strengthened RC Bridges Considering Size Effect of CFRP |
title_full_unstemmed | Reliability Analysis of CFRP-Strengthened RC Bridges Considering Size Effect of CFRP |
title_short | Reliability Analysis of CFRP-Strengthened RC Bridges Considering Size Effect of CFRP |
title_sort | reliability analysis of cfrp-strengthened rc bridges considering size effect of cfrp |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6678657/ https://www.ncbi.nlm.nih.gov/pubmed/31336887 http://dx.doi.org/10.3390/ma12142247 |
work_keys_str_mv | AT xiehuibing reliabilityanalysisofcfrpstrengthenedrcbridgesconsideringsizeeffectofcfrp AT wangyuanfeng reliabilityanalysisofcfrpstrengthenedrcbridgesconsideringsizeeffectofcfrp |