Significant Reductions in the Area in Corroded Steel and its Repercussion in Prefabricated Large-Panel Buildings
In Santiago of Cuba, there is an architectural heritage built with the prefabricated I-464 system, popularly known as the Great Soviet Panel, with more than 50 years of use. The buildings present damages such as the corrosion of the steel in the slabs, panels and horizontal joints between them. To a...
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| Format: | Online |
| Language: | eng |
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Universidad Pedagógica y Tecnológica de Colombia
2022
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| Online Access: | https://revistas.uptc.edu.co/index.php/ingenieria/article/view/13110 |
| _version_ | 1801706092841926656 |
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| author | Socarrás-Cordoví, Yamila-Concepción González-Díaz, Liliana Álvarez-Deulofeu, Eduardo-Rafael |
| author_facet | Socarrás-Cordoví, Yamila-Concepción González-Díaz, Liliana Álvarez-Deulofeu, Eduardo-Rafael |
| author_sort | Socarrás-Cordoví, Yamila-Concepción |
| collection | OJS |
| description | In Santiago of Cuba, there is an architectural heritage built with the prefabricated I-464 system, popularly known as the Great Soviet Panel, with more than 50 years of use. The buildings present damages such as the corrosion of the steel in the slabs, panels and horizontal joints between them. To analyze the earthquake-resistant behavior of deteriorated buildings, it is necessary to specify the peculiarities of the steel used as reinforcement of the structural elements. Destructive testing of steel is implemented, as well as correlation of non-destructive test results with concrete, in particular ultrasonic pulse velocity, moisture, and corrosion potential. Visual inspections are also performed to identify cracking patterns, carbonation advance, and surface color. Among the main results obtained is that the quality of the steel for the 3 mm diameter bars, which make up the electro welded meshes of the panels, do not comply with the current requirements for earthquake resistant design. These bars, in addition to a yield strength higher than recommended, are smooth bars with a non-ductile behavior, since they do not have a defined elastic limit. A considerable reduction in the diameters of the corroded bars in relation to the high levels of corrosion was obtained due to the high percentages of humidity undoubtedly causing an appreciable reduction of the yield strength of these bars. It is observed that, in the elements with the highest percentages of humidity, the most negative potential values and those with the highest corrosion velocity are reached. |
| format | Online |
| id | oai:oai.revistas.uptc.edu.co:article-13110 |
| institution | Revista Facultad de Ingeniería |
| language | eng |
| publishDate | 2022 |
| publisher | Universidad Pedagógica y Tecnológica de Colombia |
| record_format | ojs |
| spelling | oai:oai.revistas.uptc.edu.co:article-131102022-11-18T19:24:04Z Significant Reductions in the Area in Corroded Steel and its Repercussion in Prefabricated Large-Panel Buildings Reducciones significativas de área en aceros corroídos y su repercusión en edificaciones prefabricadas de grandes paneles Socarrás-Cordoví, Yamila-Concepción González-Díaz, Liliana Álvarez-Deulofeu, Eduardo-Rafael esfuerzo de fluencia hormigón prefabricado penetración de ataque reducción de diámetros velocidad de corrosión grandes paneles attack penetration corrosion velocity diameter reduction large panels precast concrete yield stress In Santiago of Cuba, there is an architectural heritage built with the prefabricated I-464 system, popularly known as the Great Soviet Panel, with more than 50 years of use. The buildings present damages such as the corrosion of the steel in the slabs, panels and horizontal joints between them. To analyze the earthquake-resistant behavior of deteriorated buildings, it is necessary to specify the peculiarities of the steel used as reinforcement of the structural elements. Destructive testing of steel is implemented, as well as correlation of non-destructive test results with concrete, in particular ultrasonic pulse velocity, moisture, and corrosion potential. Visual inspections are also performed to identify cracking patterns, carbonation advance, and surface color. Among the main results obtained is that the quality of the steel for the 3 mm diameter bars, which make up the electro welded meshes of the panels, do not comply with the current requirements for earthquake resistant design. These bars, in addition to a yield strength higher than recommended, are smooth bars with a non-ductile behavior, since they do not have a defined elastic limit. A considerable reduction in the diameters of the corroded bars in relation to the high levels of corrosion was obtained due to the high percentages of humidity undoubtedly causing an appreciable reduction of the yield strength of these bars. It is observed that, in the elements with the highest percentages of humidity, the most negative potential values and those with the highest corrosion velocity are reached. En Santiago de Cuba, existe un patrimonio edificado con el sistema prefabricado I-464, conocido popularmente como Gran Panel Soviético, con más de 50 años de explotación. Los edificios evidencian daños como la corrosión del acero en las losas, paneles y juntas horizontales entre ellos. Con la intención de analizar el comportamiento sismorresistente de las edificaciones deterioradas, se requiere precisar las peculiaridades concernientes al acero que conforma los elementos estructurales. Se recurre a la realización de ensayos destructivos al acero, así como a la correlación de los resultados de los ensayos no destructivos, en particular la velocidad del pulso ultrasónico, la humedad y el potencial de corrosión. También se realizan inspecciones visuales para precisar los patrones de fisuración, el avance de la carbonatación y el color de las superficies. Entre los principales resultados obtenidos está que la calidad del acero para las barras de diámetro 3 mm que conforman las mallas electrosoldadas de los paneles no cumple con los requerimientos actuales del diseño sismorresistente. Estas barras, además de un esfuerzo de fluencia superior al recomendado, son barras lisas con un comportamiento no dúctil, al no poseer un escalón de fluencia definido. Se obtuvo una considerable reducción de los diámetros de las barras corroídas en relación con los altos niveles de corrosión que existen a causa de los elevados porcentajes de humedad que inciden indudablemente en una reducción apreciable del esfuerzo de fluencia de esas barras. Se observa que, en los elementos con mayores porcentajes de humedad, se alcanzan los valores de potencial más negativos y los mayores valores de velocidad de corrosión. Universidad Pedagógica y Tecnológica de Colombia 2022-01-14 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf text/xml https://revistas.uptc.edu.co/index.php/ingenieria/article/view/13110 10.19053/01211129.v31.n59.2022.13110 Revista Facultad de Ingeniería; Vol. 31 No. 59 (2022): January-March 2022 (Continuous Publication); e13110 Revista Facultad de Ingeniería; Vol. 31 Núm. 59 (2022): Enero-Marzo 2022 (Publicación Continua); e13110 2357-5328 0121-1129 eng https://revistas.uptc.edu.co/index.php/ingenieria/article/view/13110/11366 https://revistas.uptc.edu.co/index.php/ingenieria/article/view/13110/11676 Copyright (c) 2022 Yamila-Concepción Socarrás-Cordoví, Liliana González-Díaz, Eduardo-Rafael Álvarez-Deulofeu http://creativecommons.org/licenses/by/4.0 |
| spellingShingle | esfuerzo de fluencia hormigón prefabricado penetración de ataque reducción de diámetros velocidad de corrosión grandes paneles attack penetration corrosion velocity diameter reduction large panels precast concrete yield stress Socarrás-Cordoví, Yamila-Concepción González-Díaz, Liliana Álvarez-Deulofeu, Eduardo-Rafael Significant Reductions in the Area in Corroded Steel and its Repercussion in Prefabricated Large-Panel Buildings |
| title | Significant Reductions in the Area in Corroded Steel and its Repercussion in Prefabricated Large-Panel Buildings |
| title_alt | Reducciones significativas de área en aceros corroídos y su repercusión en edificaciones prefabricadas de grandes paneles |
| title_full | Significant Reductions in the Area in Corroded Steel and its Repercussion in Prefabricated Large-Panel Buildings |
| title_fullStr | Significant Reductions in the Area in Corroded Steel and its Repercussion in Prefabricated Large-Panel Buildings |
| title_full_unstemmed | Significant Reductions in the Area in Corroded Steel and its Repercussion in Prefabricated Large-Panel Buildings |
| title_short | Significant Reductions in the Area in Corroded Steel and its Repercussion in Prefabricated Large-Panel Buildings |
| title_sort | significant reductions in the area in corroded steel and its repercussion in prefabricated large panel buildings |
| topic | esfuerzo de fluencia hormigón prefabricado penetración de ataque reducción de diámetros velocidad de corrosión grandes paneles attack penetration corrosion velocity diameter reduction large panels precast concrete yield stress |
| topic_facet | esfuerzo de fluencia hormigón prefabricado penetración de ataque reducción de diámetros velocidad de corrosión grandes paneles attack penetration corrosion velocity diameter reduction large panels precast concrete yield stress |
| url | https://revistas.uptc.edu.co/index.php/ingenieria/article/view/13110 |
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