Responses of structures to mining induced seismic event in the area near Karviná town

Response analyses of a selected group of typical structures to mining induced rockburst-type seismic event have been carried out. Sophisticated FEM models of analyzed structures have been developed. The measured three-directional seismogram selected to characterize the “typical mining induced seismic event” for the important mining area near Karviná town has been used to derive typical base acceleration time histories and corresponding response spectra as well. Seismic responses of structures with alternative parameters have been computed. Conclusions have been drawn for advanced seismic analyses

Requirements of technical standards for the dynamic analysis of the load-bearing structures of footbridges

The load-bearing structures of footbridges are designed to be slender and feature spans of considerable length. It can be expected that the natural frequencies of such load-bearing structures range from 0.5 Hz to 5.0 Hz. These low natural frequencies are problematic as regards the effects caused by the dynamic component of wind or the movement of persons. Increased acceleration values can lead to the serviceability limit state of structures being exceeded or the heightening of stress which can result in damage to the structure mainly in the area of details prone to fatigue. The contribution deals with the requirements concerning the execution of dynamic analyses which are listed in the relevant technical standards. It will present procedures for the determination of dynamic loading, methods of solving dynamic tasks as well as design criteria enabling delicate bridge structures to be designed correctly

Numerical simulations of tests masonry walls from ceramic block using a detailed finite element model

This article deals with an analysis of the behaviour of brick ceramic walls. The behaviour of the walls was analysed experimentally in order to obtain their bearing capacity under static loading and their seismic resistance. Simultaneously, numerical simulations of the experiments were carried out in order to obtain additional information on the behaviour of masonry walls made of ceramic blocks. The results of the geometrically and materially nonlinear computations were compared to the results of the performed tests

A comparison of spectral values obtained in bridge structures via radar interferometry and numerical calculations

Radar interferometry measurements were used to determine the dynamic response of two bridges. The dynamic excitation was performed via trucks crossing the road bumps placed upon each structure. From the relevant records we then determined the spectral values of the bridges. Detailed mathematical models enabled us to compute the natural frequencies and modes (shapes), and these were subsequently compared with their measured counterparts

Response of a panel building to mining induced seismicity in Karvina

A dynamic behaviour of technological structures and buildings under a non-stationary dynamic loading is investigatedby technical seismicity. The solution of this problem is based on field seismic measurements using a specific source of technicalseismicity induced by the mining activity in the area under study (Karviná region in the Czech Republic). Finite element models areprepared for computer analyses of seismic responses of measured structures. The twelve-storey panel residential building was selectedfor the seismic analysis as a representative structure