Now showing items 1-20 of 141

    A machine learning based material homogenization technique for masonry structures 

    Kalkbrenner, Philip (Date of defense: 2021-11-03)

    Cutting-edge methods in the computational analysis of structures have been developed over the last decades. Such modern tools are helpful to assess the safety of existing buildings. Two main finite element (FE) modeling ...

    A model for the non linear dynamic analysis of reinforced concrete and masonry framed structures 

    Sima Brum, Jose Fernando (Date of defense: 2010-02-05)

    La evaluación de la respuesta dinámica o sísmica de estructuras complejas a menudo requiere de la integración en el dominio del tiempo de la ecuación de equilibro dinámico de la estructura, en el marco de un análisis no ...

    A model for the nonlinear, time-dependent and strengthening analysis of shear critical frame concrete structures 

    Ferreira, Denise Carina Santos (Date of defense: 2013-03-22)

    Nonlinear fibre beam models, due to its intrinsic simplicity and computational efficiency, are often an adequate alternative to the complex nonlinear plane and solid FE models for the assessment of entire frame structures. ...

    A non-linear coupled model for the analysis of reinforced concrete sections under bending, shear, torsion and axial forces 

    Bairán García, Jesús Miguel (Date of defense: 2005-12-15)

    La mayoría de las estructuras de hormigón armado se someten a solicitaciones combinadas de esfuerzos axiles, flexión, cortante y torsión. La fisuración del hormigón, plastificación de las armaduras y otros efectos no-lineales ...

    Accelerated cementitious matrices : hydration, microstructure and mechanical strength 

    Salvador, Renan Pícolo (Date of defense: 2016-12-12)

    Sprayed concrete is widely used as structural support for the stabilization of tunnel walls and underground constructions. The performance of sprayed cementitious matrices containing accelerators is strongly related to ...

    Activación alcalina de residuos urbanos e industriales para la construcción de piezas prefabricadas 

    García Díaz, Yineth Paola (Date of defense: 2023-09-27)

    (English) A comprehensive evaluation of various industrial and urban by-products was conducted to determine their potential as precursors for alkali-activated materials (AAM) in Spain. Over 15 by-products were identified ...

    Análisis de valor en la toma de decisiones aplicado a carreteras 

    Villegas Flores, Noé (Date of defense: 2009-03-16)

    Con frecuencia los modelos de evaluación aplicados a carreteras consideran aspectos relativos a la funcionalidad, seguridad, comodidad del usuario, medioambiente, etc. Sin embargo, dichos aspectos pocas veces son evaluados ...

    Análisis numérico de presas de hormigón bajo acciones expansivas 

    Moura, André Campos de (Date of defense: 2012-11-23)

    The main objective of this thesis is to study the mechanical behavior of a dam concrete under internal expansive phenomena in both the macro-structural and the meso-structural level. An important contribution of this work ...

    Aplicabilidad de la ceniza volcánica de baja actividad como nuevo recurso para materiales cementicios sostenibles 

    Játiva Guzmán, Andrés (Date of defense: 2024-05-29)

    (English) Volcanic ash (VA), abundantly available in various regions globally, serves as an effective supplementary cementitious material (SCM) for partially substituting Portland cement (OPC). However, its inherently low ...

    Aportaciones al estudio del comportamiento a flexión de estructuras de acero inoxidable 

    Real Saladrigas, Esther (Date of defense: 2001-05-24)

    L'acer inoxidable està essent utilitzat de manera creixent en els últims anys als sectors de la indústria i de l'arquitectura gràcies a la seva resistència a la corrosió, facilitat de manteniment i aparença agradable. Però, ...

    Aportaciones al proyecto, construcción y reparación de pavimentos de hormigón 

    López Carreño, Rubén-Daniel (Date of defense: 2018-07-31)

    The construction and conservation of road networks represent a major part of public expenditure. For instance, the EU-28 countries annually spend approximately EUR 20.000 million on roadway preservation. These figures ...

    Application of observability techniques to structural system identification including shear effects 

    Emadi, Seyyedbehrad (Date of defense: 2020-12-11)

    According to Timoshenko’s beam theory, nodal rotations in beam-like structures are produced by bending and shear effects. On the one hand, bending rotations can be easily calculated by the Euler-Bernoulli stiffness matrix ...

    Aspectos tecnológicos de túneles construidos con tuneladora y dovelas prefabricadas de hormigón 

    Pialarissi Cavalaro, Sergio Henrique (Date of defense: 2009-07-24)

    El número de túneles construidos con tuneladora tipo TBM ha aumentado considerablemente en las últimas décadas en consecuencia de los avances tecnológicos observados en estas máquinas y en el propio proceso constructivo. ...

    Assessment of chloride corrosion in steel fibre reinforced cementitious composites 

    Vieira, Mylene de Melo (Date of defense: 2018-10-19)

    High performance steel fibre reinforced cementitious composites (HPSFRCCs) show enhanced structural performance and durability. The improved properties favour its use in agressive conditions (such as marine environment) ...

    Bi-layer diaphragm walls : experimental and numerical analysis 

    Segura-Castillo, Luis (Date of defense: 2013-11-22)

    Leakage is a widespread problem associated with the construction of diaphragm walls whenever they are erected in water-bearing ground. The aim of the present research is to develop a new type of slurry wall: the bi-layer ...

    Bioreceptivity optimisation of concrete substratum to stimulate biological colonisation 

    Manso Blanco, Sandra (Date of defense: 2014-05-09)

    The lack of green areas in cities is caused by the increase in population and the urbanisation process. However, an increasing interest in city greenery was observed since the beginning of twentieth century. Several benefits ...

    Building information modeling for facility managers 

    Alavi, Hamidreza (Date of defense: 2022-10-11)

    A Decision Support System (DSS) can help facility managers to improve building performance, occupants’ comfort, and energy efficiency during the Operation and Maintenance (O&M) phase. These DSSs are normally data-intensive ...

    Caracterización de las propiedades del hormigón autocompactante asociadas al esqueleto granular 

    Parapinski dos Santos, Ana Carolina (Date of defense: 2010-06-28)

    En el disseny y la caracterització del formigons autocompactants (HAC) tenen implementació tant els propis components de la mescla (volum de pasta y naturalesa de la mateixa, tipus i contingut de fi, estructura del esquelet ...

    Caracterización y diseño del homigón reforzado con fibras plásticas 

    Pujadas, Pablo (Date of defense: 2013-03-22)

    En esta Tesis Doctoral se abordan aspectos de gran interés en relación a la caracterización del HRFP, la definición de una ecuación constitutiva considerando la orientación de las fibras, y el comportamiento diferido del ...

    Características estructurales del hormigón con árido reciclado mixto reforzado con fibras 

    Mena Sebastiá, Francisco (Date of defense: 2015-07-08)

    Despite the advance that has led the incorporation of Annex 15 in the Spanish EHE-08, the use of recycled aggregate concrete (RAC) is minimum in structural applications. This regulation limits the percentage of substitution ...