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Seismic rocking effects on a mine tower under induced and natural earthquakes

Wybrane pełne teksty z tego czasopisma
Identyfikatory
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
Recent research in engineering seismology demonstrated that in addition to three translational seismic excitations along x, y and z axes, one should also consider rotational components about these axes when calculating design seismic loads for structures. The objective of this paper is to present the results of a seismic response numerical analysis of a mine tower (also called in the literature a headframe or a pit frame). These structures are used in deep mining on the ground surface to hoist output (e.g. copper ore or coal). The mine towers belong to the tall, slender structures, for which rocking excitations may be important. In the numerical example, a typical steel headframe 64 m high is analysed under two records of simultaneous rocking and horizontal seismic action of an induced mine shock and a natural earthquake. As a result, a complicated interaction of rocking seismic effects with horizontal excitations is observed. The contribution of the rocking component may sometimes reduce the overall seismic response, but in most cases, it substantially increases the seismic response of the analysed headframe. It is concluded that in the analysed case of the 64 m mining tower, the seismic response, including the rocking ground motion effects, may increase up to 31% (for natural earthquake ground motion) or even up to 135% (for mining-induced, rockburst seismic effects). This means that not only in the case of the design of very tall buildings or industrial chimneys but also for specific yet very common structures like mine towers, including the rotational seismic effects may play an important role.
Rocznik
Strony
410--420
Opis fizyczny
Bibliogr. 35 poz., rys., wykr.
Twórcy
  • Faculty of Civil Engineering and Architecture, Opole University of Technology, ul. Prószkowska 76, 45-758 Opole, Poland
autor
  • Faculty of Civil Engineering and Architecture, Opole University of Technology, ul. Prószkowska 76, 45-758 Opole, Poland
  • Faculty of Civil Engineering and Architecture, Opole University of Technology, ul. Prószkowska 76, 45-758 Opole, Poland
Bibliografia
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  • [32] Sbaa S, Hollender F, Perron V, Imtiaz A, Bard P-Y, Mariscal A, et al. Analysis of rotation sensor data from the SINAPS@ Kefalonia (Greece) post-seismic experiment-link to surface geology and wavefield characteristics. Earth Planets Space. 2017. https:// doi. org/ 10. 1186/ s40623- 017- 0711-6.
  • [33] Bońkowski P, Zembaty Z, Minch M (2018) 6-dof strong ground motion data records from Kefalonia Island (November 8th 2014, MMI = VII and November 17th 2015, MMI = V). Dataset: https:// data. mende ley. com/ datas ets/ n3tgf n7xj8/1. Accessed 3 Feb 2020.
  • [34] Bońkowski PA. rotational effects for slender building structures under seismic excitations. PhD Thesis. Opole; Feb 14, 2018.
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Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-8cf320fe-f015-4ed8-a25a-e7f1c80f2909
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