Encontrados 12 documentos, a visualizar página 1 de 2
Desenvolvimento de membranas catalíticas poliméricas para a metanólise de ácido...
Bento, Rita Alvarez MartinsDissertação para obtenção do Grau de Mestre em Engenharia Química e Bioquímica ; Durante as últimas décadas, tem-se observado um aumento considerável no preço do petróleo. A procura por matérias-primas alternativas, que consigam ser economicamente vantajosas em comparação com as actuais, tem conduzido à aposta na produção de biodiesel. Uma das formas de produção de biodiesel consiste na metanólise de óleos veg...
Veterinary pharmacovigilance, from regulation to scientific explanation : case ...
Bento, Rita Isabel CostaDissertação de Mestrado Integrado em Medicina Veterinária ; Veterinary pharmacovigilance is the science and activities related to the detection, assessment, understanding and prevention of adverse effects or any other medicine-related problem associated to veterinary medicinal products. It seems that some breeds are more sensitive than others to this type of events and understanding this sensitivity is permitt...
"Proposed Management Plan For Rul Dibba - Al Faqeet Marine Protected Area, Fuja...
Bento, Rita Costa San MiguelMestrado em Ciências do Mar - Recursos Marinhos ; Master degree in Sciences of the Sea-Sea Resources
Calibration of model parameters for the cyclic response of end-plate beam-to-co...
Nogueiro, Pedro; Silva, Luís Simões da; Bento, Rita; Simões, RuiComposite joints, considering the composite action of steel and concrete, exhibit, in general, high strength and high ductility. As a consequence, the use of this type of joint has been increasing in many countries, especially in those that are located in earthquake-prone regions. In this paper, a hysteretic model with pinching is presented that is able to reproduce the cyclic response of steel and composite jo...
Numerical implementation and calibration of a hysteretic model with pinchin...
Nogueiro, Pedro; Silva, Luís Simões da; Bento, Rita; Simões, RuiIn this paper, a hysteretic model with pinching is presented that is able to reproduce realistically the cyclic response of generic steel joints. Secondly, the computer implementation and adaptation of the model in a spring element within the computer code SeismoStruct is described. The model is subsequently calibrated using a series of experimental test results for steel joints subjected to cyclic loading. Fin...
Evaluation of the ductility demand in partial strength steel structures in seis...
Nogueiro, Pedro; Bento, Rita; Silva, Luís Simões daThe performance of a structural system can be evaluated resorting to non-linear static analysis, also commonly referred to as Pushover Analysis, because of the nature of application of lateral loads while defining the capacity of the structure. This analysis involves the estimation of the structural strength and deformation demands and the comparison with the available capacities at desired performance levels. ...
Numerical implementation and calibration of a hysteretic model for cyclic respo...
Nogueiro, Pedro; Silva, Luís Simões da; Bento, RitaThis work presents the implementation and calibration of Modified Richard-Abbott model for cyclic response of four end-plate beam-to-column steel joints under arbitrary cyclic loading. The joints parameters are found and the comparison between the analytical hysteretic results and the experimental hysteretic results is made, as well as the hysteretic energy dissipated evaluated for each cycle and obtained for b...
Experimental behaviour of standardised European end plate beam-to-column stel j...
Nogueiro, Pedro; Silva, Luís Simões da; Bento, Rita; Simões, RuiThis work presents the results of the study of the six experimental tests of standardised end-plate beam-to-column steel joints under arbitrary cyclic loading. The experimental programme is divided into two groups, varying the column section size. Each group has the first monotonic test and two more cyclic tests with arbitrary loading. The results are presented in terms of M-Ø curves, main mechanical joint prop...
Influence of joint slippage on the seismic response of steel frames
Nogueiro, Pedro; Silva, Luís Simões da; Bento, RitaThe present paper presents an evaluation of the influence of joint slippage on the seismic response of steel frames. Using three alternative hysteretic joint models to simulate the connections of a representative low-rise steel frame, and a series of dynamic time-history analyses for a typical seismic record, it is found that slippage affects the response of the structure and should be allowed for in design.
Numerical implementation and calibration of a hysteretic model with pinching fo...
Nogueiro, Pedro; Silva, Luís Simões da; Bento, Rita; Simões, RuiIn this paper, a hysteretic model with pinching is presented that is able to reproduce the cyclic response of steel and composite joints. Secondly, the computer implementation and adaptation of the model in a spring element within the computer code Seismosoft is described. The model is subsequently calibrated using a series of experimental test results for steel and composite joints subjected to cyclic loading....
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