Identyfikatory
Warianty tytułu
Języki publikacji
Abstrakty
The problem of propagation of vibration waves in soil caused by passing trains and vehicles is an important issue for the assessment of their influence on environmental impacts and engineering structures such as bridges, viaducts, historic architecture and residential buildings. The issue is complex because the nature of the soil is heterogeneous and the groundwater level changing depending on the season and this creates great difficulties in developing a theoretical model of vibration wave propagation. The paper presents developed numerical model of soil consisting of 4.3 million cubic finite elements based on the geological properties of soil. Developed model based on Drucker- Prager material model, which is often used in numerical methods for simulating the behaviour of different soil types. In addition, the material properties of the soil was specially prepared and allowed to use them directly in the material model used. Both concrete (building) and steel (plate forcing) were modelled using an isotropic material model. Element size was set at 300 mm. This value was determined by the adopted frequency range studied (0 to 100 Hz) and due to verification by simulation results of experimental studies in which excitation has been implemented in the frequency of 33 Hz (base frequency of excitation signal) and 66 Hz (second harmonic of excitation signal). The cut-off frequency 100 Hz defines a minimum wavelength propagated in the soil (based on the stiffness and density of the soil) and 10 finite elements was adopted at a wavelength, which is 3 meters to the ground, for the correct mapping of a sinusoidal waveform. Subsequently, experimental studies were performed to verify the model from which the conclusions are presented in the work. The work was carried out in a research project 4875/B/TO2/2010/38 financed by Ministry of Science and Higher Education.
Wydawca
Czasopismo
Rocznik
Tom
Strony
31--39
Opis fizyczny
Bibliogr. 11 poz., rys.
Twórcy
autor
- AGH University of Science and Technology Faculty of Mechanical Engineering and Robotics Department of Robotics and Mechatronics Mickiewicza Av. 30, 30-059 Krakow, Poland tel.: +48 12 617-35-11, fax: +48 12 634-35-05, bednarz@agh.edu.pl
Bibliografia
- [1] Adamczyk, J., Targosz, J., Drgania drogowe, Wydawnictwo Katedry Robotyki i Dynamiki Maszyn AGH, Kraków 2003.
- [2] Bednarz, J, Targosz, J., Finite elements method in analysis of propagation of vibrations wave in the soil, Journal of KONES Powertrain and Transport, Vol. 18, No. 3, pp. 19–25, 2011.
- [3] Bednarz, J., Brożek, G., Targosz, J., Finite elements method for analysis of soil vibration, Logistyka 6, pp. 195-203, 2010.
- [4] Bednarz, J., Targosz, J., Experimental analysis of propagation of vibrations wave in the soil caused by passing trams, Logistyka 6, pp. 153–160, 2011.
- [5] Bednarz, J., Targosz, J., Experimental analysis of springy elements application in vibration isolation of railway subgrades, Logistyka 6, pp. 143–152, 2011.
- [6] Ciesielski, R., Maciąg, E., Drgania drogowe i ich wpływ na budynki, WKŁ, Warszawa 1990.
- [7] Gerolymos, N., Gazetas, G., Static and dynamic response of massive caisson foundations with soil and interface nonlinearities—validation and results, Soil Dynamics and Earthquake Engineering, 26, 377-394, 2006.
- [8] Lipiński, J., Fundamenty pod maszyny, Wydawnictwo Arkady, Warszawa 1985.
- [9] Polish Norm PN-80/B-03040, The foundations and supporting structures of the machine - calculations and design.
- [10] Polish Norm PN-85/B-02170, Evaluation of harmful vibrations transmitted by the base of buildings.
- [11] Targosz, J., Układy wibroizolacji w transporcie szynowym i samochodowym, Rozprawy i Monografie, Wydawnictwa Naukowo-Dydaktyczne AGH, Kraków 2007.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BUJ8-0019-0003