scholarly journals Normalized response spectra from surface vibrations induced by mining tremors

2014 ◽  
Vol XXXI (61 (2/14)) ◽  
pp. 69-80 ◽  
Author(s):  
Krystyna Kuźniar ◽  
◽  
Edward Maciąg ◽  
Tadeusz Tatara ◽  
◽  
...  
Keyword(s):  
Response Spectra ◽  
Surface Vibrations ◽  
Mining Tremors

Response Spectra of Ground Motions and Building Foundation Vibrations Excited by Rockbursts in the LGC Region

2016 ◽  
Vol 32 (3) ◽  
pp. 1769-1791 ◽  
Author(s):  
Edward Maciag ◽  
Krystyna Kuzniar ◽  
Tadeusz Tatara
Keyword(s):  
Soil Structure ◽  
Response Spectrum ◽  
Ground Vibration ◽  
Response Spectra ◽  
Ground Vibrations ◽  
Building Foundation ◽  
Standard Response ◽  
Surface Vibrations ◽  
Mining Tremors ◽  
New Buildings

Surface vibrations induced by mining rockbursts resulting from underground exploitation in the mines in western Poland were analyzed and classified into three different categories. Comparison of the accelerograms simultaneously recorded on the ground and on the foundations of typical buildings, as well as the response spectra determined on the basis of these records, leads to the conclusion that ground vibration characteristics have a significant influence on the nature of vibration transmission from the ground to the building foundation. Analysis of the response spectra, separately determined from both ground vibrations and building foundation vibrations, indicates that the standard response spectrum based on building foundation vibrations is more useful in the design of new buildings in areas of mining tremors than the spectrum based on ground vibrations. Moreover, the usefulness of the models of soil-structure interaction based on seismic data in California was investigated with respect to mine-induced rockbursts in Poland.

Neural Networks for the Simulation and Identification Analysis of Buildings Subjected to Paraseismic Excitations

2007 ◽  
pp. 393-432 ◽  
Author(s):  
Krystyna Kuzniar ◽  
Zenon Waszczyszyn
Keyword(s):  
Neural Networks ◽  
Structural Dynamics ◽  
Dynamic Properties ◽  
Response Spectra ◽  
Engineering Practice ◽  
Identification Analysis ◽  
Dynamics Problems ◽  
Mining Tremors ◽  
Testing Patterns ◽  
Mining Regions

The chapter deals with an application of neural networks to the analysis of vibrations of medium-height prefabricated buildings with load-bearing walls subjected to paraseismic excitations. Neural network technique was used for identification of dynamic properties of actual buildings, simulation of building responses to paraseismic excitations as well as for the analysis of response spectra. Mining tremors in strip mines and in the most seismically active mining regions in Poland with underground exploitation were the sources of these vibrations. On the basis of the experimental data obtained from the measurements of kinematic excitations and dynamic building responses of actual structures the training and testing patterns were formulated. It was stated that the application of neural networks enables us to predict the results with accuracy quite satisfactory for engineering practice. The results presented in this chapter lead to a conclusion that the neural technique gives new prospects of efficient analysis of structural dynamics problems related to paraseismic excitations.

Computation of response spectra from mining tremors using neural networks

2005 ◽  
Vol 25 (4) ◽  
pp. 331-339 ◽  
Author(s):  
K. Kuźniar ◽  
E. Maciąg ◽  
Z. Waszczyszyn
Keyword(s):  
Neural Networks ◽  
Response Spectra ◽  
Mining Tremors

scholarly journals The ratio of response spectra from seismic-type free-field and building foundation vibrations: the influence of rockburst parameters and simple models of kinematic soil-structure interaction

2019 ◽  
Vol 18 (3) ◽  
pp. 907-924 ◽  
Author(s):  
Krystyna Kuzniar ◽  
Tadeusz Tatara
Keyword(s):  
Soil Structure ◽  
Epicentral Distance ◽  
Free Field ◽  
Response Spectra ◽  
Soil Structure Interaction ◽  
Ground Acceleration ◽  
Structure Interaction ◽  
Building Foundation ◽  
Mining Tremors ◽  
The Impact

Abstract Mining-related seismicity is a significant problem in regions with the exploitation in underground mines. Despite the fact that mining tremors result from human activity and are classified as so-called paraseismic shocks, as with earthquakes, they are random events. Moreover, these rockbursts could cause significant damage to surface structures, including buildings. This paper deals with the analysis of experimentally obtained results in terms of the differences between the mine-induced vibrations described by the response spectra from the free-field near a given building and the simultaneously recorded vibrations in the building foundations. The influences of epicentral distance, mining tremor energy and the value of peak ground acceleration on the curves of free-field—foundation response spectra ratio were studied. The impact of the type of building on the transmission of response spectra from the free-field vibrations to the building foundations was also analysed for three types of apartment buildings (low-rise, medium-rise, high-rise). The usefulness of the approximate models of the phenomenon of soil-structure interaction during earthquakes proposed in the literature is also estimated in this paper in specific instances of mining tremors. Furthermore, the study presents original, simple, empirical models for the evaluation of the differences in the response spectra originating from free-field and building foundation vibrations in the mining region.

Inclusion of Aircraft Crash into NPP Design Bases and Probabilistic Justification of Loads on Civil Structures and Equipment

2020 ◽  
pp. 35-47
Author(s):  
Nikita Chernukha
Keyword(s):  
Nuclear Power ◽  
Response Spectra ◽  
Mechanical Action ◽  
Exceedance Probability ◽  
Civil Structures ◽  
Method Of Calculation ◽  
Floor Response Spectra ◽  
Aircraft Trajectory ◽  
Probabilistic Justification ◽  
Aircraft Crash

The article is about nuclear power plant (NPP) safety analysis in case of aircraft crash. Specifically, the article considers the following problems: inclusion of aircraft crash into NPP design bases regarding calculation of frequency of an aircraft crash into NPP; aspects of justification of loads on NPP structures, systems and components (SSCs) caused by mechanical action of a primary missile – aircraft fuselage impact. Probabilistic characteristics of such random parameters as frequency of aircraft crash and direction of aircraft trajectory are determined by the results of analysis of world statistics of aviation accidents. Method of calculation of aircraft crash frequency on structures, buildings and NPP as a whole is presented. It takes into account options of accidental and intentional aircraft crashes and various aircraft approach scenarios. Procedure of probabilistic justification of loads on civil structures under aircraft impact is described. The loads are specified so as not to exceed allowable value of failure probability of NPP as a whole. Calculation of failure frequency of civil structures of existing NPP is given as an example to show analysis in case of a crash of an aircraft heavier than considered in NPP design. Procedure of probabilistic justification of dynamic loads on NPP equipment in case of aircraft impact is described. Method of floor response spectra (FRS) calculation with the required non-exceedance probability is given. Probabilistically justified loads in case of intentional aircraft impact (act of terrorism) are also considered. Additionally it is presented how internal forces calculated with the use of FRS with the required non-exceedance probability can be summed to provide analysis of subsystems.

A subset of CyberShake ground-motion time series for response-history analysis

2021 ◽  
pp. 875529302098197
Author(s):  
Jack W Baker ◽  
Sanaz Rezaeian ◽  
Christine A Goulet ◽  
Nicolas Luco ◽  
Ganyu Teng
Keyword(s):  
Time Series ◽  
Los Angeles ◽  
Seismic Hazard ◽  
Ground Motion ◽  
Ground Motions ◽  
Response Spectra ◽  
Motion Time ◽  
History Analysis ◽  
Response History Analysis ◽  
Simulated Ground Motions

This manuscript describes a subset of CyberShake numerically simulated ground motions that were selected and vetted for use in engineering response-history analyses. Ground motions were selected that have seismological properties and response spectra representative of conditions in the Los Angeles area, based on disaggregation of seismic hazard. Ground motions were selected from millions of available time series and were reviewed to confirm their suitability for response-history analysis. The processes used to select the time series, the characteristics of the resulting data, and the provided documentation are described in this article. The resulting data and documentation are available electronically.

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