Nonlinear seismic analysis of concrete buildings considering different models of plastic hinges

Congreso celebrado en la Escuela de Arquitectura de la Universidad de Sevilla desde el 24 hasta el 26 de junio de 2015.Pushover analysis is one of the most frequently used methods for the seismic analysis of structures. The accurate modelling of the plastic hinges generated during the pushover analysis is crucial. The response curve of plastic hinges can be defined with empirical expressions that obtain the yielding and ultimate states of the cross‐sections. The main objective of this work is to study the influence of different plastic hinge models on the structural nonlinear behaviour. Several pushover analyses have been executed with the software ETABS®, considering the following plastic hinge models: (i) the model of FEMA‐356 included in ETABS®, and (ii) a model proposed by the authors using empirical expressions calibrated with a database of tests. The results obtained show that the empirical expressions can be used by structural engineers to model plastic hinges in concrete structures with a theoretical response closer to the real one

Large amplitude pairing fluctuations in atomic nuclei

Pairing fluctuations are self-consistently incorporated on the same footing as the quadrupole deformations in present state of the art calculations including particle number and angular momentum conservation as well as configuration mixing. The approach is complemented by the use of the finite range density dependent Gogny force which, with a unique source for the particle-hole and particle-particle interactions, guarantees a self-consistent interplay in both channels. We have applied our formalism to study the role of the pairing degree of freedom in the description of the most relevant observables like spectra, transition probabilities, separation energies, etc. We find that the inclusion of pairing fluctuations mostly affects the description of excited states, depending on the excitation energy and the angular momentum. $E0$ transition probabilities experiment rather big changes while $E2$'s are less affected. Genuine pairing vibrations are thoroughly studied with the conclusion that deformations strongly inhibits their existence. These studies have been performed for a selection of nuclei: spherical, deformed and with different degree of collectivity.Comment: 23 pages, 23 Figures, To be published in Phys. Rev.

Seismic behaviour of concrete structures depending on the model of plastic hinge

Comunicación presentada en el VII Congreso Trienal de la Asociación Científico-Técnica del Hormigón Estructural (ACHE), A Coruña, 20-22 junio 2017.The influence of different plastic hinge models on the nonlinear behaviour of reinforced concrete structures is studied in this contribution. Several nonlinear analyses have been performed considering the plastic hinge model of FEMA-356 and two additional models by using empirical expressions calibrated with different experimental data. A simplified structure has been used as example. The results obtained show that plastic hinges modelled with empirical expressions can be used to more precisely model the behaviour of structural elements and to compare with the results offered by the models included in seismic building design codes

Seismic behaviour of concrete structures depending on the model of plastic hinge

Conocer los efectos y las consecuencias causadas por un evento sísmico en las estructuras ha ocasionado que la predicción y simulación, mediante modelos numéricos, del comportamiento de estructuras de hormigón armado sometidas a la acción sísmica sea un tema de interés creciente en los últimos años. El análisis sísmico es un análisis exigente desde el punto de vista computacional que requiere la implementación de modelos precisos y eficientes. Por tanto, resulta conveniente desarrollar modelos de comportamiento seccional que reduzcan la exigencia computacional, como por ejemplo los basados en expresiones calibradas con ensayos experimentales

Los descubrimientos casuales en las intervenciones telefónicas como medidas coercitivas en el proceso penal

Publicad

A new way of teaching different subjects in a foreign language in the Building Engineering Degree at the Universidad Politécnica.

The European Union has been promoting linguistic diversity for many years as one of its main educational goals. This is an element that facilitates student mobility and student exchanges between different universities and countries and enriches the education of young undergraduates. In particular, a higher degree of competence in the English language is becoming essential for engineers, architects and researchers in general, as English has become the lingua franca that opens up horizons to internationalisation and the transfer of knowledge in today’s world. Many experts point to the Integrated Approach to Contents and Foreign Languages System as being an option that has certain benefits over the traditional method of teaching a second language that is exclusively based on specific subjects. This system advocates teaching the different subjects in the syllabus in a language other than one’s mother tongue, without prioritising knowledge of the language over the subject. This was the idea that in the 2009/10 academic year gave rise to the Second Language Integration Programme (SLI Programme) at the Escuela Arquitectura Técnica in the Universidad Politécnica Madrid (EUATM-UPM), just at the beginning of the tuition of the new Building Engineering Degree, which had been adapted to the European Higher Education Area (EHEA) model. This programme is an interdisciplinary initiative for the set of subjects taught during the semester and is coordinated through the Assistant Director Office for Educational Innovation. The SLI Programme has a dual goal; to familiarise students with the specific English terminology of the subject being taught, and at the same time improve their communication skills in English. A total of thirty lecturers are taking part in the teaching of eleven first year subjects and twelve in the second year, with around 120 students who have voluntarily enrolled in a special group in each semester. During the 2010/2011 academic year the degree of acceptance and the results of the SLI Programme have been monitored. Tools have been designed to aid interdisciplinary coordination and to analyse satisfaction, such as coordination records and surveys. The results currently available refer to the first and second year and are divided into specific aspects of the different subjects involved and into general aspects of the ongoing experience