Impact assessment of epicentral distances and energies of mining shocks on the transmission of free-field vibrations to the building foundations / Krystyna Kuzniar, Tadeusz Tatara // W: COMPDYN 2017 : ... więcej

Impact assessment of epicentral distances and energies of mining shocks on the transmission of free-field vibrations to the building foundations / Krystyna Kuzniar, Tadeusz Tatara // W: COMPDYN 2017 : Computational Methods in Structural Dynamics and Earthquake Engineering : proceedings of the 6th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, Rhodes Island, Greece 15-17 June 2017. [Vol. 2] [Dokument elektroniczny] / ed. by M. Papadrakakis, M. Fragiadakis. – Athens : Institute of Structural Analysis and Antiseismic Research. School of Civil Engineering. National Technical University of Athens (NTUA), 2017. – S. 4645-4653 : tab., wykr. – Tryb dostępu: https://2017.compdyn.org/. – Bibliogr. 11 poz., Abstr. – ISBN 978-618-82844-2-5 vol. 2. – ISBN 978-618-82844-3-2

The study analyses the results of measurements of mining related surface vibra-tions in the Legnica-Glogow Copper Region (LGCR) to assess the impact of mining tremor epicentral distances as well as mining ... więcej

The study analyses the results of measurements of mining related surface vibra-tions in the Legnica-Glogow Copper Region (LGCR) to assess the impact of mining tremor epicentral distances as well as mining tremors energies on a curve relationship (ratio) of re-sponse spectra (RRS) from simultaneously measured free-field vibrations and building foun-dations vibrations. The sources of considered vibrations were mine-induced rockbursts resulting from underground exploitation of copper ore. Only records induced by rockbursts with energy higher than 106 J and horizontal components of peak ground accelerations larger than 10cm/s2 are analysed. Epicentral distances of considered mining shocks are in the range re = 270 – 5839 m and energies are in the range En = 1∙106 – 2∙109 J. Dimensionless acceler-ation response spectra (β) as well as dimensional acceleration response spectra (Sa) from the horizontal vibrations were taken into account. The focus is on residential buildings – medium-rise building and high-rise building. The results of analyses show that the epicentral distance of mining shock can have a significant impact on the transmission of response spectra from the free-field to the residential building foundations (medium-rise building and high-rise building). This effect is more visible in the case of curves RRS(β) determined using dimen-sionless acceleration response spectra β than curves RRS(Sa) calculated for corresponding pairs for dimensional spectra Sa. The appropriate conclusions regarding the influence of min-ing tremors energies also have been achieved.