Zbigniew Zembaty

TL;DR: In this paper, two reinforced concrete frames were put on a shaking table and underwent seismic excitations with increasing intensities to study changes in their dynamic, modal parameters due to development of cracks in concrete.

TL;DR: In this article, the authors compared these rockburst induced ground motions with low intensity earthquakes and concluded that although short duration is the most obvious parameter that differentiates rockbursts from earthquakes, in fact their high dominant frequencies, which result in high PGA/PGV ratios differentiate them the most.

TL;DR: It is shown that optical rotational seismometer based on the ring-laser gyroscope concept is the best for seismological applications, whereas systems based on fiber-optic gyroscopes demonstrate parameters which are also required for engineering applications.

TL;DR: Igel et al. as mentioned in this paper focused on recent developments in the area of rotational seismology and engineering applications, showing that rotational ground motions can contribute to the excitation of structures and structures can radiate additional rotational motions, which can help in decomposing seismic wave fields.

TL;DR: In this article, the spectral densities of the rotational components of seismic ground motion were derived by decomposing ground motion at the site into body and surface wave contributions with random amplitudes.