DEVELOPMENT OF TECHNIQUES FOR REINFORCING CONCRETE STRUCTURES WITH ADVANCED MATERIALS AND THEIR MECHANICAL STRUCTURAL BEHAVIOR MODELS FOR THE EXTENSION OF THEIR USEFUL LIFE (Q3152689): Difference between revisions
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(Created claim: summary (P836): THE ADAPTATION OF EXISTING TRANSPORT INFRASTRUCTURES TO CURRENT CONDITIONS OFTEN REQUIRES THE CONSIDERATION OF HIGHER LOADS THAN THOSE INCLUDED IN THE PROJECT REGULATIONS USED IN THE INITIAL CONCEPTION OF THE INFRASTRUCTURE. THE COORDINATED PROJECT IN WHICH THIS PROJECT IS PART OF THE PROJECT AIMS, IN THE FIRST PLACE, TO DEVELOP A MECHANICAL MODEL AGAINST NORMAL AND TANGENT REQUESTS LESS CONSERVATIVE THAN THE MODELS OF THE CURRENT REGULATIONS, B...) |
(Changed label, description and/or aliases in en: translated_label) |
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DEVELOPMENT OF TECHNIQUES FOR REINFORCING CONCRETE STRUCTURES WITH ADVANCED MATERIALS AND THEIR MECHANICAL STRUCTURAL BEHAVIOR MODELS FOR THE EXTENSION OF THEIR USEFUL LIFE | |||
Revision as of 15:33, 12 October 2021
Project Q3152689 in Spain
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | DEVELOPMENT OF TECHNIQUES FOR REINFORCING CONCRETE STRUCTURES WITH ADVANCED MATERIALS AND THEIR MECHANICAL STRUCTURAL BEHAVIOR MODELS FOR THE EXTENSION OF THEIR USEFUL LIFE |
Project Q3152689 in Spain |
Statements
59,290.0 Euro
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118,580.0 Euro
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50.0 percent
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1 January 2016
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31 December 2019
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UNIVERSIDAD DE LAS ISLAS BALEARES
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39°34'10.49"N, 2°39'0.25"E
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07040
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LA ADAPTACION DE LAS INFRAESTRUCTURAS EXISTENTES DEL TRANSPORTE A LAS CONDICIONES ACTUALES REQUIERE, CON FRECUENCIA, LA CONSIDERACION DE CARGAS MAYORES A LAS QUE INCLUIAN LAS NORMATIVAS DE PROYECTO UTILIZADAS EN LA CONCEPCION INICIAL DE LA INFRAESTRUCTURA. EL PROYECTO COORDINADO EN EL QUE SE INSCRIBE ESTE PROYECTO PRETENDE, EN PRIMER LUGAR, DESARROLLAR UN MODELO MECANICO FRENTE A SOLICITACIONES NORMALES Y TANGENTES MENOS CONSERVADOR QUE LOS MODELOS DE LAS NORMATIVAS ACTUALES, EN BASE A UN MODELO PREVIO DE LA UPC Y LA UIB. SIN EMBARGO, EN MULTIPLES CASOS SERA NECESARIO PROCEDER A REFORZAR EXTERNAMENTE LAS ESTRUCTURAS PARA PODER LLEGAR A RESISTIR LAS CARGAS PREVISTAS POR LAS NORMATIVAS ACTUALES._x000D_ _x000D_ EXISTEN DIVERSAS TECNICAS DE REFUERZO FRENTE A SOLICITACIONES TANGENTES, ENTRE LAS CUALES DESTACAN LAS REALIZADAS MEDIANTE POLIMEROS REFORZADOS CON FIBRAS (FRP), GENERALMENTE DE TIPO PASIVO, Y EL PRETENSADO EXTERIOR, LONGITUDINAL O TRANSVERSAL, COMO REFUERZO ACTIVO. A PESAR DE QUE AMBAS TECNOLOGIAS SON CONOCIDAS, TODAVIA NO EXISTE UN CONSENSO EN CUANTO AL INCREMENTO DE RESISTENCIA QUE APORTAN ESTOS REFUERZOS FRENTE A LOS ESFUERZOS CORTANTES. POR OTRA PARTE, RECIENTES INVESTIGACIONES HAN DEMOSTRADO QUE LAS ALEACIONES CON MEMORIA DE FORMA (SMA) SON CAPACES DE PRODUCIR EL EFECTO DE UN PRETENSADO CONSTANTE EN EL TIEMPO TRAS SU ACTIVACION, MEDIANTE SU CALENTAMIENTO, QUE PUEDE SER INDUCIDO MEDIANTE LA CREACION DE UN CIRCUITO ELECTRICO GRACIAS AL EFECTO JOULE. ESTO PERMITE LA POSIBILIDAD DE PRETENSAR ELEMENTOS CON GEOMETRIAS DIVERSAS Y SIN GATOS HIDRAULICOS. POR TANTO, LAS SMA SE PRESENTAN COMO UNA ALTERNATIVA, O INCLUSO UN COMPLEMENTO, A LAS TECNICAS DE FRP Y DE PRETENSADO EXTERIOR PARA EL REFUERZO DE ESTRUCTURAS._x000D_ _x000D_ EN ESTE CONTEXTO, EL PRESENTE SUBPROYECTO TIENE COMO PRIMER OBJETIVO FUNDAMENTAL EL DESARROLLO DE UNA TECNICA NUEVA DE REFUERZO A CORTANTE MEDIANTE EL USO DE SMAS Y CONTRIBUIR A DEFINIR Y DIFERENCIAR EL PRINCIPAL CAMPO DE APLICACION DE LA NUEVA TECNOLOGIA FRENTE A LAS DIFERENTES TECNICAS ANTES MENCIONADAS. PARA EL DESARROLLO DE LA TECNICA DE REFUERZO CON SMA SERA NECESARIO EVALUAR DISTINTAS ALEACIONES, PREVIENDOSE LA CARACTERIZACION DE UNA ALEACION NI-TI-NB Y UNA ALEACION EN BASE HIERRO. TAMBIEN SERA NECESARIO DEFINIR TODOS LOS DETALLES DE LA TECNICA DE REFUERZO, COMO SON LA DISPOSICION DE LOS DISTINTOS ELEMENTOS Y LOS ANCLAJES AL HORMIGON, ASI COMO EL PROCESO REAL DE EJECUCION CONSIDERANDO LA ACTIVACION DEL EFECTO MEMORIA DE FORMA, INCLUYENDOSE EN ESTE SUBPROYECTO LA VALIDACION DE LA TECNOLOGIA COMPLETA CON ELEMENTOS A PEQUEÑA ESCALA._x000D_ _x000D_ ADEMAS, EL SEGUNDO OBJETIVO GENERAL DEL SUBPROYECTO ES LA EXTENSION DEL MODELO MECANICO FRENTE A CORTANTE QUE SE DEFINIRA EN EL SUBPROYECTO UPC, PARA TENER EN CUENTA LAS TRES TECNOLOGIAS DE REFUERZO OBJETO DE ESTUDIO: FRP, SMA Y PRETENSADO EXTERIOR. ESTO PERMITIRA AL INGENIERO QUE SE ENFRENTE A LA EVALUACION Y POSIBLE INTERVENCION SOBRE UNA ESTRUCTURA EXISTENTE EVALUAR Y REFORZAR CON EL MISMO MODELO MECANICO Y LAS MISMAS HERRAMIENTAS DE CALCULO, HECHO QUE LE PERMITIRA OPTIMIZAR E INCLUSO COMBINAR LAS DIFERENTES TECNOLOGIAS DE REFUERZO._x000D_ _x000D_ PARA LA EXTENSION DEL MODELO, TANTO PARA LA TECNICA SMA COMO PARA PRETENSADO, SE DEBERAN CONSIDERAR LAS TENSIONES VERTICALES Y/O HORIZONTALES QUE SE PRODUCEN. PARA EL REFUERZO EXTERIOR CON FRP SE CONSIDERARA LA CONFIGURACION DE ESTE, COMPLETAMENTE ENVUELTO, EN FORMA DE U O ADHERIDO A LAS CARAS LATERALES, Y SU DISPOSICION DISCONTINUA O CONTINUA, ENTRE OTROS ASPECTOS. (Spanish)
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THE ADAPTATION OF EXISTING TRANSPORT INFRASTRUCTURES TO CURRENT CONDITIONS OFTEN REQUIRES THE CONSIDERATION OF HIGHER LOADS THAN THOSE INCLUDED IN THE PROJECT REGULATIONS USED IN THE INITIAL CONCEPTION OF THE INFRASTRUCTURE. THE COORDINATED PROJECT IN WHICH THIS PROJECT IS PART OF THE PROJECT AIMS, IN THE FIRST PLACE, TO DEVELOP A MECHANICAL MODEL AGAINST NORMAL AND TANGENT REQUESTS LESS CONSERVATIVE THAN THE MODELS OF THE CURRENT REGULATIONS, BASED ON A PREVIOUS MODEL OF THE UPC AND THE UIB. However, IN MULTIPLES HOUSE IS NECESARY PROCESSING TO REFORE EXTERNATIONAL STRUCTURES TO BE ARROWED TO RESIST THE PROVIDED CARSES BY ACTUAL NORMATIVES._x000D_ _x000D_ there are TECHNICAL REFERRED DIVERSES FROM TECHNICAL REFERRATIONS ON TANGEMENTS, BETWEEN THE QUESTIONS DEALISED MEDIANTES REFORCED WITH FIBRAS (FRP), general PASSIVO TYPE, AND THE EXTERIOR, longitudinal OR TRANSVERSAL PRETENSATED, AS REFERRED ACTIVE. ALTHOUGH BOTH TECHNOLOGIES ARE KNOWN, THERE IS STILL NO CONSENSUS ON THE INCREASE IN RESISTANCE THAT THESE REINFORCEMENTS BRING AGAINST CUTTING EFFORTS. ON THE OTHER HAND, RECENT RESEARCH HAS SHOWN THAT SHAPE MEMORY ALLOYS (SMA) ARE CAPABLE OF PRODUCING THE EFFECT OF A CONSTANT PRESTRESS OVER TIME AFTER ACTIVATION, THROUGH THEIR HEATING, WHICH CAN BE INDUCED BY THE CREATION OF AN ELECTRIC CIRCUIT THANKS TO THE JOULE EFFECT. THIS ALLOWS THE POSSIBILITY OF PRE-TENSIONING ELEMENTS WITH VARIOUS GEOMETRIES AND WITHOUT HYDRAULIC CATS. Therefore, the SMAs are presented as an alternative, or an addition, to the external FRP and PRETENSATED TECHNICALS for the refurbishment of structures._x000D_ _x000D_ IN THIS CONTEXT, the present sub-project MUST AS FIRST FUNDAMENTAL OBJECTIVE THE DEVELOPMENT OF A NEW TECHNICAL REFERRANT TO COURT BY THE USE OF SMAS AND CONTRIBUTION TO DEFIN AND DIFFERENT THE PRINCIPAL APPLICATION CAMP OF THE NEW TECHNOLOGY FENT TO THE TECHNICAL DIFFERENTS BEFORE MEETING. FOR THE DEVELOPMENT OF THE REINFORCEMENT TECHNIQUE WITH SMA IT WILL BE NECESSARY TO EVALUATE DIFFERENT ALLOYS, ANTICIPATING THE CHARACTERISATION OF A NI-TI-NB ALLOY AND AN IRON-BASED ALLOY. It will also be necessary to define all the details of the relevant technology, as they are the provision of the different elections and anchors to the HORMIGON, as well as the actual implementation process, including the activation of the MEMORIA EFFECTMENT OF FORMMA, including in this sub-project the validation of the TECHNOLOGY COMPLETED WITH ESCAL SMALL ELEMENTS._x000D_ _x000D_ ADEMAS, THE GENERAL OBJECTIVE OF THE sub-project IS THE EXTENSION OF THE MECHANICAL MODEL FRONTHER TO BE defined in the UPC sub-project, TO take into account the three TECHNOLOGIES OF REFERRATION OF STUDY OBJECTIVE: FRP, SMA AND EXTERNAL PRESTRESSING. This will allow the ENGINEER to take on the evaluation and possible intervention on an existing structure to assess and strengthen with the same mechanistic model and the same Calculation tools, which would allow it to allow it to open up and involve the different technical aspects of refurbishment._x000D_ _x000D_ FOR THE EXTENSION OF MODEL, TANT FOR THE SMA TECHNICAL AS TO PRETENSATED, THE VERTICAL TENSIONS AND/OR HORIZONTAL THIS PRODUCTION should be considered. FOR EXTERNAL REINFORCEMENT WITH FRP, THE CONFIGURATION OF THE FRP, COMPLETELY WRAPPED, IN THE FORM OF U OR ATTACHED TO THE SIDE FACES, AND ITS DISCONTINUOUS OR CONTINUOUS DISPOSITION, AMONG OTHER ASPECTS, SHALL BE CONSIDERED. (English)
12 October 2021
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Palma de Mallorca
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Identifiers
BIA2015-64672-C4-3-R
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