01
Autores:
Iraola Sáenz, Borja Iñaki (Autor de correspondencia); Cabrero Ballarín, José Manuel; Basterrechea Arevalo, Mar Ainhoa; et al.
Revista:
ENGINEERING STRUCTURES
ISSN
0141-0296
Vol.
235
2021
págs.
112062
Finite element models tend to overestimate the actual elastic response of structural timber connections. The paper shows how such overprediction relates to the modelling of the contact between fasteners and timber. The use of a control parameter called stiffness contact is proposed. After an experimental campaign, a method to determine it, based only on the geometry of a rectangular contact area, is proposed. The modeling adequacy is demonstrated by applying it to dowel embedment and moment resistant wood joint tests. The obtained results show good agreement with the experimental test series.
02
Autores:
Quinteros-Mayne, R.; Arteaga Jordá, Ignacio; Goñi Lasheras, Rufino; et al.
Revista:
DYNA
ISSN
0012-7361
Vol.
96
N°
5
2021
págs.
464 - 467
Desde los inicios del análisis estructural de las estructuras de mampostería, se ha perseguido conocer su comportamiento teniendo en cuenta la influencia de los distintos elementos que lo conforman, evolucionando el análisis estructural de los arcos de fábrica hasta analizar el comportamiento fracto-mecánico de la mampostería.
Este artículo presenta la adaptación del criterio de falla de Tsai- Hill para materiales ortótropos, aplicado al estudio de los arcos de mampostería. Ello se ha llevado acabo la adaptación en una subrutina VUSFLD de ABAQUS en lenguaje de programación Fortran. Esta subrutina se ha validado en atención a la falla del mortero, y se ha analizado el efecto del mortero en el análisis de un arco de mampostería. La subrutina implementada en un masomodelo permite observar la contribución del mismo a la capacidad portante de un arco.
03
Autores:
Basterrechea Arevalo, Mar Ainhoa; Cabrero Ballarín, José Manuel (Autor de correspondencia); Iraola Sáenz, Borja Iñaki; et al.
Revista:
ENGINEERING STRUCTURES
ISSN
0141-0296
Vol.
247
2021
págs.
113122
The development of accurate structural modelling techniques is required to promote the use of timber as a renewable alternative to other structural materials. Due to their remarkable influence on the global behaviour of a timber structure, an accurate description of the performance of structural connections is needed. Particularly in the case of moment transmitting beam-to-column connections with dowel-type fasteners, such properties are difficult to obtain experimentally. This paper develops a finite element (FE) model that simulates the behaviour of these connections under quasi-static loading, with a focus on the estimation of rotational stiffness and load distribution among the dowels. The model is validated against short-term laboratory tests. Resulting friction between timber members due to the installation procedure must be considered, as it greatly influences the rotational response. Besides, non-linear behaviour of timber and a softened contact parameter have been implemented, and their influence on the FE model validation process is demonstrated.
04
Autores:
Iraola Sáenz, Borja Iñaki; Cabrero Ballarín, José Manuel
Revista:
ENGINEERING STRUCTURES
ISSN
0141-0296
Vol.
117
2016
págs.
332 - 343
Wood, as a natural heterogeneous material, is a challenging material to simulate. This work presents an algorithm to model both its elastic and post-elastic responses. It allows to model different compression and tension elastic and failure behaviors in both material directions, parallel and perpendicular to the grain. It employs two different strategies: a sequential application of different failure criteria, and the modeling of post-elastic response by means of damage and stress reduction parameters. The proposed algorithm is applied to spruce in two experimental cases with different loadings and failure modes. When reasonable mesh density and increment size are used, the obtained results are in good agreement with the experimental results. The proposed algorithm has been programmed in the commercial software ABAQUS. However, it may be easily applied to different platforms or wood species.
05
Autores:
Sánchez-Beitia, S.; Torres, L.; Barrallo, J.; et al.
Revista:
GDANSKI ROCZNIK KULTURALNY
ISSN
0860-2492
Vol.
1-3
2012
págs.
2060 - 2064
The paper deals with the first works for the application of the Hole-Drilling technique on timber structures in service. The final objective of the research is the deduction of the stresses in structural elements of Architectural Heritage. The method involves glued strain gages at the surface of a structural element. At least three strain gages are placed in the area under consideration in order to record the strains originated by stress relaxation after eliminating a round of 18 mm diameter and 16 mm depth. The stresses before drill can be deduced with an appropriate mathematical scheme. The Hole Drilling technique can be considered as minor destructive test providing sufficient information to calculate the principal stresses and their directions around the drill. At laboratory four wood specimens (blocks) have been loaded under known stresses in order to compare them with those stresses obtained by the hole drilling procedure. The results show some desviation because the mathematical scheme assumes the blocks as isotropic material. In this sense, the research described has to be improved to take into account the orthotropyc behavior of the wood as structural element.
01
Autores:
Cabrero Ballarín, José Manuel; Iraola Sáenz, Borja Iñaki; Yurrita Lozano, Miguel
Libro:
Handbook of Materials Failure Analysis With Case Studies From the Construction Industries
02
Autores:
Iraola Sáenz, Borja Iñaki; Cabrero Ballarín, José Manuel
Libro:
Actas del 6º Congreso Forestal. Montes: servicios y desarrollo rural
