Wyniki wyszukiwania - BazTech

Ograniczanie wyników

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

Damage identification in the building's shear walls by a non-destructive method

Drumev K., Milchev E., Baltov A.

Archives of Civil Engineering

2004

Vol. 50, nr 1

121-132

This paper present a method for identification of the decreasing the project stiffness of building's shear walls caused by previous earthquakes, blasts, poor workmanship, careless exploitation or arbitrary reconstructions. The method is non-destructive and is based on the comparison between the dynamic parameters of the real building measured in situ with its unknown damages and the same parameters computed from the FE model of the project building.

Przedstawiono metodę identyfikacji zmniejszania się zaprojektowanej nośności ścian budynków, pracujących na ścinanie, spowodowanego trzęsieniami ziemi, niewłaściwą eksploatacją lub błędami w rekonstrukcji. Metoda ta jest nieniszcząca i opiera się na porównaniu parametrów dynamicznych istniejącego budynku pomierzonych "in situ" przy nieznanych defektach z parametrami wyliczonymi modelem ES dla zaprojektowanego budynku.

Plastic wave propagation in Hopkinson bar - revisited

Mićunović M., Baltov A.

Archives of Mechanics

2002

Vol. 54, nr 5-6

577-602

The subject of this paper is an analysis of the experimental Hopkinson bar technique when such a device consists of a short tensile or shearing specimen surrounded by two very long elastic bars [1]. Unlike the commonly applied by-pass analysis which attempts to draw conclusions from the behaviour of elastic bars, we attempt to take into account real plastic waves inside the specimen with several hundreds of reflections. A quasi rate-independent as well as a more general, rate-dependent tensor function model for AISI 316H calibrated in [19] are applied. Some special slightly perturbed elastic incident and reflected waves in elastic bars served to simulate the starting solutions. The numerical results have shown a good agreement with experimentally observed homogeneous strain state throughout the specimen during the process. Lindholm's procedure for finding specimen stress and strain by such a by-pass procedure is criticized.