Use of Headed Reinforcement Bars in Contruction. A Theoretical Approach to Determine the Dimensions of Anchorage Plates and Experimental Tests on Knee Joints Subjected to a Closing Moment

In order to reduce costs and time while improving quality, durability and sustainability in structural concrete constructions, a widely used material nowadays, special care must be taken in some crucial phases of the project and execution, including the structure design and calculation, the dosage, dumping and curing of concrete: another important aspect is the proper design and execution of assembly plans and construction details. The framework, a name designating the whole reinforcement bars cage already assembled as shown in the drawings, can be made up of several components and implies higher or lower industrialization degree. The framework costs constitute about one third of the price per cubic meter placed in concrete works. The best solutions from all points of view are clearly those involving an easier processing to achieve the same goal, and consequently carrying a high degree of industrialization, meaning quality and safety in the work. This thesis aims to provide an indepth analysis of a relatively new type of anchoring by plate known as headed reinforcement bars, which can potentially replace standard or L-shaped hooks, improving the cleaning of construction details and enabling a faster, more flexible, and therefore a more economical assembly. A literature review on the topic and an overview of typical applications is provided, followed by some examples of specific applications in real projects. Since a strict theoretical formulation used to provide the design plate dimensions has not yet been put forward, an equation is proposed for the side-face blowout strength of the anchorage, based on the capacity of concrete to carry concentrated loads in cases in which no transverse reinforcement is provided. The correlation of the calculated ultimate load with experimental results available in the literature is given. Besides, the proposed formulation can be expanded to cases in which a certain development length is available: using a software for nonlinear finite element analysis oriented to the study of reinforced concrete, numerical tests on the bond-bearing interaction are performed. The thesis ends with a testing of eight corner joints subjected to a closing moment, held in the Structures Laboratory of the Polytechnic University of Madrid, aiming to check whether the design of such plates as stated is adequate for these elements and whether an element with plate-anchored reinforcement is equivalent to one with a traditional construction detail.

X-ray absorption study of the ferromagnetic Cu moment at the YBa_(2)Cu_(3)O_(7)/La_(2/3)Ca_(1/3)MnO_(3) interface and variation of its exchange interaction with the Mn moment

With x-ray absorption spectroscopy and polarized neutron reflectometry we studied how the magnetic proximity effect at the interface between the cuprate high-TC superconductor YBa_(2)Cu_(3)O_(7) (YBCO) and the ferromagnet La_(2/3)Ca_(1/3)MnO_(3) (LCMO) is related to the electronic and magnetic properties of the LCMO layers. In particular, we explored how the magnitude of the ferromagnetic Cu moment on the YBCO side depends on the strength of the antiferromagnetic (AF) exchange coupling with the Mn moment on the LCMO side. We found that the Cu moment remains sizable if the AF coupling with the Mn moments is strongly reduced or even entirely suppressed. The ferromagnetic order of the Cu moments thus seems to be intrinsic to the interfacial CuO_(2) planes and related to a weakly ferromagnetic intraplanar exchange interaction. The latter is discussed in terms of the partial occupation of the Cu 3d_(3z^(2)−r^(2)) orbitals, which occurs in the context of the so-called orbital reconstruction of the interfacial Cu ions.

Experiències senzilles de física recreativa: Conservació del moment lineal, efecte Coandă i emissió atòmica

La realització pràctica d’experiments és fonamental en qualsevol disciplina científica. Per això, en aquest treball exposem una sèrie d’experiències de física senzilles i sorprenents que ens permetran reforçar diversos conceptes físics d’una manera amena, utilitzant materials molt assequibles i barats. Amb la realització d’aquests experiments volem estimular la curiositat de l’alumnat i el plaer per la investigació i el descobriment de nous fenòmens físics. Aquestes experiències estan adreçades tant a estudiants d’educació secundària i batxillerat com a alumnes dels primers cursos d’universitat. Hem dissenyat i dut a terme experiències de diversos camps de la física, entre els quals hi ha algunes pràctiques per a posar de manifest la conservació del moment lineal, o l’efecte Coandă en fluids en moviment, i també experiments de física atòmica relacionats amb l’emissió atòmica en l’espectre visible, que posen de manifest la quantització de l’energia dels nivells atòmics. Amb aquestes experiències volem motivar els alumnes en l’estudi i l’interès per la física des d’una perspectiva diferent de l’habitual.

A post-mortem of the Vilnius Summit: Not yet a ‘Thessaloniki moment’ for the Eastern Partnership. CEPS Commentary, 3 December 2013

In assessing the third Eastern Partnership (EaP) Summit at Vilnius on November 28-29th, this CEPS Commentary concludes that the event fell far short of its initial ambition to define the geopolitical finalité of EU-EaP relations by projecting a path towards future accession to the EU for Armenia, Azerbaijan, Belarus, Georgia, Moldova and Ukraine.

Ukraine and Security Disorder in Europe – A Defining Moment for the OSCE? CEPS Commentary, 24 April 2014

The Organization for Security and Cooperation in Europe (OSCE) is the first and currently the only international body to have a monitoring mission deployed in Ukraine. This is as it should be, argues Erwan Fouéré. Today, with EU members making up half the membership of the OSCE, the EU needs to show greater responsibility and far-sightedness in its dealings with the OSCE. In the run-up to the 40th anniversary of the Helsinki Final Act, and faced with its most serious security crisis since the fall of the Berlin Wall, the EU should take the lead once again in fostering collective responsibility on the part of all Participating States to ensure a meaningful and effective role for the OSCE.

Ukraine and Security Disorder in Europe - A Defining Moment for the OSCE? CEPS Commentary, 24 April 2014

The Organization for Security and Cooperation in Europe (OSCE) is the first and currently the only international body to have a monitoring mission deployed in Ukraine. This is as it should be, argues Erwan Fouéré. Today, with EU members making up half the membership of the OSCE, the EU needs to show greater responsibility and far-sightedness in its dealings with the OSCE. In the run-up to the 40th anniversary of the Helsinki Final Act, and faced with its most serious security crisis since the fall of the Berlin Wall, the EU should take the lead once again in fostering collective responsibility on the part of all Participating States to ensure a meaningful and effective role for the OSCE.

Turkey’s 7 June parliamentary elections – Part I. A pivotal moment for Turkey’s future. EPC Commentary, 3 June 2015

On 7 June, Turks will head to the polls to elect a new parliament. This election is a pivotal moment for Turkey’s future, with two battles being played out. While the first is about securing a majority in parliament, the second is related to President Recep Tayyip Erdoğan and his goal of creating a presidential system of governance. Furthermore, the future of the Kurdish Peace Process and the stability in the southeast of the country will almost certainly hinge on the outcome. Hence, this election is a battle for Turkey's future.

The nuclear deal with Iran: Le moment suprême? CEPS Commentary, 16 July 2015

More than two years in the making, the agreement concluded by China, the EU, France, Germany, Russia, the UK and the US with Iran to prevent the ‘weaponisation’ of the latter’s nuclear programme is a big deal. But, cautions Steven Blockmans in this CEPS Commentary, it is not the silver bullet to the normalisation of relations. Implementation will be a tortuous process, fraught with suspicion and friction. Although Europe has been called upon to seize the moment and to shift to a relationship with Iran based on engagement, not containment, the EU and its member states would be better advised not to move beyond their nuclear focus too quickly, but rather to show a sense of duty and loyal cooperation with their international partners by supporting the effective execution of the accord.

The United States and Cuba, a propitious moment : a report /

At head of title: 93d Congress, 2d session. Committee print.

Advice to a mother on the management of her children : and on the treatment on the moment of some of [sic] their more pressing illnesses and accidents /

Includes index.

Lépidoptères: descriptions de tous les papillons qui se trouvent en France, indiquant l'époque de l'éclosion de chaque espèce, les localités qu'elle fréquente, la plante qui nourrit la chenille, le moment ou il convient de la chasser, précédées de renseignements sur la chasse, la préparation et la conservation, etc.

Vols. 5-6 in series: Librairie zoologique.

Mémoire qui a remporté le prix au jugement de l'Académie de Dijon le 18 août 1776, sur la question proposée en ces termes : déterminer quelles sont les maladies dans lesquelles la médecine agissante est préférable a l'expectante, et celle ce a l'agissante ; et a quels signes le médecin reconnoit qu'il doit agir, ou rester dans l'inaction, en attendant le moment favorable pour placer les remedes? /

Mode of access: Internet.

Stresses in reinforced nozzle-cylinder attachments under external moment loadings analyzed by the finite-element method : a parameter study /

"ORNL/NUREG-52."

Never a dull moment,

Autobiography.