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Semi-active control of a methalic scalled frame with a MR damper: numerical an...

The need of vibration control has been spreading in tha last two decades to new application fields such as in the dynamic response of civil engineering structures. In this specific field a promising new technology for control of structural vibrations is based on the use of magneto-rheological (MR) fluid devices in the so-called MR dampers. The present work describes part of the R&D on using a semi-active struct...

Semi-active vibration control of buildings using MR dampers: numerical and expe...

The present work describes part of the R&D on using a semi-active structural control technique in a civil engineering experimental model frame equipped with a MR damper, developed within COVICOCEPAD project approved in the framework of Eurocores program S3T. Some results are provided associated with the calibration of a MR damper at FEUP as well as on the experimental modal identification of the dynamic propert...

Estudo numérico sobre o controlo semi-activo o de um pórtico metálico com amor...

O presente trabalho pretende apresentar parte da investigação desenvolvida no âmbito do projeto COVICOCEPAD relativa ao controlo semi-activo de estruturas de engenharia civil através da utilização de amortecedores Magneto-Reológicos (MR). Para este efeito foi construído um modelo numérico que permite a inclusão do comportamento do martecedor MR no modelo estrutural através de uma formulação em espaço de estado....

Avaliação estrutural do Centro de Formação Desportiva de Alfandega da Fé

A parametric study on a RC frame based on “PUSHOVER” analysis

Three commercial software packages (SAP 2000, SeismoStruck and MIDAS/CIVIL) universally used in the design of civil engineering structures, are applied on a parametric study of pushover analyses of a RC frame of an office building under a few evaluative phases. In order to represent the influence of the masonry infill panels the equivalent tie method is used; for a sensitivity study on the capacity curves, seve...

Geometric and material nonlinear analysis of imperfect circular hollow section...

The comparison between theoretical predictions and design curve predictions of the critical stresses, for a wide range of slenderness ratio, is valid and useful. For columns made of steel S235 with initial deformations and slenderness below about 60, columns capacity is controlled by elastic-plastic resistant and performance, as the slenderness decreases (until the minimum limit, controlled by crushing or plast...

Some resesarch on control of vibrations in civil engineering under covicocepad...

Some information is provided on the latest R&D within COVICOCEPAD project approved in the framework of Eurocores program. It addresses the use of TMD’s TLD’s, base isolation devices, MR dampers and a hybrid technique using both devices together. Some results are provided associated with calibration of a MR damper at FEUP, as well as its inclusion in a small scale laboratory set-up with proper equations of motio...

Seismic performance of metallic braced frames by pushover analysis

A preliminary investigation is presented on a pushover analysis used for the seismic performance of metallic braced frames equipped with diagonal X-bracing and K-bracing systems. Three steel frames were analysed corresponding to 3, 6 and 10 floor regular buildings. The frames were modelled in the MIDAS/Civil finite element software and in the analyses nonlinear static methods were used to obtain the pushover cu...

R&D on control of vibrations under covicocepad during 2007-2008

This paper provides information on the latest R&D within COVICOCEPAD project approved in the framework of Eurocores program. It addresses the use of TLD, base isolation devices, MR dampers and a hybrid technique using both devices together. Some results are provided associated with calibration of a MR damper at FEUP, as well as its inclusion in a small scale laboratory set-up with proper equations of motion of ...

Seismic performance of metallic braced frames by pushover analyses

A preliminary investigation is presented on a pushover analysis used for the seismic performance of metallic braced frames equipped with diagonal X-bracing and K-bracing systems. Three steel frames were analysed corresponding to 3, 6 and 10 floor regular buildings. The frames were modelled in the MIDAS/Civil finite element software and in the analyses nonlinear static methods were used to obtain the pushover cu...