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  • Periodica Polytechnica Budapest University of Technology and Economics  (2)
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  • Periodica Polytechnica Budapest University of Technology and Economics  (2)
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  • 1
    Online Resource
    Online Resource
    Periodica Polytechnica Budapest University of Technology and Economics ; 2020
    In:  Periodica Polytechnica Civil Engineering ( 2020-05-22)
    In: Periodica Polytechnica Civil Engineering, Periodica Polytechnica Budapest University of Technology and Economics, ( 2020-05-22)
    Abstract: The seismicity of Hungary can be considered moderately active, nevertheless contemporary reports from the past approx. 350 years documented surface manifestations of liquefaction occurrences. The last such earthquake was the 1956 Dunaharaszti ground motion, for which the location of two liquefied sites could be identified approx. 60 years after the event. This provided an excellent opportunity to analyze possibly the only accessible liquefied sites in Hungary. Analysis of the two sites included field and laboratory tests allowing the back-calculation of maximum horizontal ground acceleration of the earthquake. This parameter was previously unknown because the closest seismometer saturated during the event. The performed back-analysis using the principles of paleoliquefaction studies was the first of such analyses in the country. In areas with low to moderate seismicity, geotechnical engineers often neglect and overlook liquefaction hazard, however, when it is addressed, the hazard is often overestimated due to improper characterization of the seismic loading and site characterization. To explore this observation more deeply, probabilistic seismic and liquefaction hazard assessment were carried out at the two liquefied sites and it was found that this conclusion is also valid for Hungary, but the degree of conservatism of the pseudo-probabilistic procedures decreases with increasing earthquake return period (lower annual probability of occurrence).
    Type of Medium: Online Resource
    ISSN: 1587-3773 , 0553-6626
    Language: Unknown
    Publisher: Periodica Polytechnica Budapest University of Technology and Economics
    Publication Date: 2020
    detail.hit.zdb_id: 2045172-6
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  • 2
    Online Resource
    Online Resource
    Periodica Polytechnica Budapest University of Technology and Economics ; 2021
    In:  Periodica Polytechnica Civil Engineering ( 2021-02-22)
    In: Periodica Polytechnica Civil Engineering, Periodica Polytechnica Budapest University of Technology and Economics, ( 2021-02-22)
    Abstract: Earthquakes are one of the most devastating natural disasters on Earth, causing sometimes huge economic losses and many human casualties. Since earthquake prediction is not yet possible, the purpose of civil protection is to reduce damage and protect human lives, in which the seismological networks of different countries play a very important role. Special applications of seismic networks are the early warning systems that can be used to protect vulnerable infrastructures using automated shutdown procedures, to stop high velocity trains and to save lives if the general public is notified about imminent strong ground shaking. In this paper, we describe the aims and operation of seismological networks, covering in more detail the early warning systems. Then we delineate the seismotectonic settings and seismicity in Hungary and Kazakhstan, furthermore, describe the operating seismological networks and the related scientific research areas with emphasis on civil protection. Hungary and Kazakhstan differ not only in the size of their territory, but also in their seismicity, therefore, in addition to the similarities, there are also significant differences between the aims and problems of their seismological networks.
    Type of Medium: Online Resource
    ISSN: 1587-3773 , 0553-6626
    Language: Unknown
    Publisher: Periodica Polytechnica Budapest University of Technology and Economics
    Publication Date: 2021
    detail.hit.zdb_id: 2045172-6
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
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