Análisis comparativo de los resultados entre Compresómetro analógico y lvdt’s en ensayos de compresión de cilindros de concreto.
The concrete is brought under many different tests to determine its mechanical properties; the most common is the test of compressive strength where the action of an axial load is reached at breakage, in a certain percentage of the load the concrete presents linear deformations and therefore its mod...
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| Formato: | bachelorThesis |
| Idioma: | spa |
| Publicado em: |
2017
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| Assuntos: | |
| Acesso em linha: | http://dspace.unach.edu.ec/handle/51000/3473 |
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Adicionar Tag | Resumo: | The concrete is brought under many different tests to determine its mechanical properties; the most common is the test of compressive strength where the action of an axial load is reached at breakage, in a certain percentage of the load the concrete presents linear deformations and therefore its modulus of elasticity can be determined. This mechanical property is closely linked to the structural analysis because it is used in the calculation of stiffness of concrete elements, a good design and calculation of stiffness support the seismic performance of the structure. The measurement of the deformations can be done in two ways: by taking manual data using an analogue compression tester and with a LVDT's automatically connected to a console that interprets and records the received measurements. However, the use of an analogue compression tester requires a lot of time for the preparation of the samples and entails the danger of damaging it. The UNACH Materials Test Laboratory does not have a system to automatically measure such deformations, so it was investigated how to quantify this parameter in the most effective and precise way, seeing the need to equip the laboratory with an electric console which will perform this measurement automatically with LVDT's. An analysis of the two equipments was carried out through the elasticity modulus, accuracy, measurement error and test time. Moreover an ANOVA experimental design was performed for the comparison between the results of the analogue compression tester and the console for LVDTs to determine which of these measuring tools is effective and covers better the needs of the Laboratory Technician. This research determined that although the analogue compression tester is suitable for this type of tests, the console for LVDT's has higher accuracy, lower error range in its measurements and its utilization is effective for the shortest operating time because it is an automated procedure. |
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