Encontrados 14 documentos, a visualizar página 1 de 2
Comportamento cíclico de ligações metálicas
Nogueiro, PedroO interesse da investigação do comportamento de estruturas metálicas solicitadas a acções sísmicas é um tema actual constantemente lembrado por notícias que nos mostram a ocorrência frequente de sismos nas mais diversas regiões do mundo. Neste trabalho de doutoramento, descreve-se a execução de um programa experimental de ensaios de ligações metálicas à escala real, dividido em quatro séries totalizando um tota...
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...
Modelações de ligações na análise sísmica de pórticos metálicos
Mota, Laertes; Rebelo, Carlos; Silva, Luís Simões da; Nogueiro, Pedro; Lima, LucianoNeste artigo é avaliada a influência da modelação das ligações estruturais viga-pilar no comportamento sísmico de pórticos metálicos sem contraventamentos a partir de análises dinâmicas não-lineares. Inicialmente estuda-se a influência do comportamento histerético global da ligação, comparando com o comportamento elasto-plástico. Numa segunda fase estudase a influência da distorção da alma do pilar ao corte no ...
Typology of seismic motion and seismic engineering design
Mistakidis, E.; Apostolska-Petrusevska, R.; Dubina, D.; Graf, W.; Necevska-Cvetanovska, G.; Nogueiro, Pedro; Pannier, S.; Sickert, J.The paper deals with the influence of the seismic motion typology on the structural response and with engineering design under exceptional actions. Various aspects of seismic motion typology that lead to exceptional actions on the structures are covered. The influence of near fault ground motions, the effect of local site parameters and the magnification of the seismic action on short-period structures are amon...
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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