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The evaluation of the reduction of seismic response of adjacent structures using viscous damper joints

Malek H. K., Emami K.

Advances in Science and Technology. Research Journal

2017

Vol. 11, no 3

31--47

This study examines the effects of common viscose damper on the behavior of adjacent reinforced concrete structures. For this purpose, three reinforced concrete buildings with 3, 5 and 7 floors and a regular plan were selected and were compared in two cases with and without viscous dampers at the seams. They are designed based on discussions of Buildings Regulations 2800 and the 6 and 9 issues of Iranian National Building Regulations. Those buildings that were under the analysis of accelerograms of Bam, Mangil and El Centro, are then analyzed with nonlinear modal time history. The accelerograms before applied to the structures are scaled based on the 2800 Regulations. Those buildings were modeled by SAP2000 finite element modeling software. Linear behavior of structural components of said structure and the non-linear behavior of viscous dampers were modeled. Finally, the seismic response of the buildings includes the base shear force, up to a maximum lateral acceleration of seismic classes. Classes for both with and without the viscous damper have been extracted and compared. The results showed the reduction in relative lateral displacement, maximum acceleration and base cut applied to a structure in the presence of viscous dampers between two structures. This decline is not even in the direction that the viscous damper is viewed as significant.

Błędy i nieporozumienia w prognozie maksymalnych przyspieszeń od wstrząsów górniczych w rejonie wpływu eksploatacji

Kornowski J., Kurzeja J.

WUG : bezpieczeństwo pracy i ochrona środowiska w górnictwie

2006

nr 6

27-29

Przedstawiamy krótki przegląd zagadnień związanych z błędami prognozy maksymalnych przyspieszeń a max) od wstrząsów górniczych w obszarze objętym wpływami eksploatacji. Badania nasze sugerują, że oprócz znanych czynników wpływających na jakość prognoz, także zmienność ośrodka - właśnie pod wpływem eksploatacji - powoduje, że relacje tłumienia stają się lokalne nie tylko w przestrzeni ale i w czasie.

This is a review of problems with determining prediction uncertainty of the so called maximum acceleration from mining-induced tremors in the area influenced by mining. Large set of observations from the "Miechowice" station is used to illustrate some thesis and problems. With this example we have to conclude that an attenuation not only is a local-in-space description of attenuation but in the mining-influenced area it may also change in time.