Journal of
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CONFERENCE PROCEEDINGS
5th INTERNATIONAL CONFERENCE
CONTEMPORARY ACHIEVEMENTS IN CIVIL ENGINEERING 2017 , 2017.y., pp. 545-552


EARTHQUAKE EFFECTS ON THE GROUND IN THE ROCK BOLT AREA - A 3D COMPUTATIONAL MODEL
 
DOI: 10.14415/konferencijaGFS2017.058
UDC: 624.078.7:004.4
CC-BY-SA 4.0 license
Author : Lukić, Dragan; Maslak, Emir; Zlatanović, Elefterija; Manić, Nazim
 
 Summary:
 The subject of this research work are the rock bolts that are used to stabilize the ground around the tunnel. The idea is that the anchors, being loaded by tensioning force, impose compressive stress to the rock, and by that, strengthen and stabilise the ground. It is obvious that the stress–strain state in the anchorage zone becomes significantly changed due to the installation of rock bolts. There is a number of researches and expressions that define the change of this state under the static loading condition. What is much more complicated, however, is to determine the stress–strain state in the anchorage zone under dynamic loads, in particular considering the 3D model. In this paper, the given problem under the dynamic/seismic load is modelled by the finite element method using the software ANSYS WORKBENCH. A full transient dynamic analysis is performed. With respect to the loading, along with geostatic stress and prestressing force, a part of the acceleration record of the El Centro Earthquake has also been considered in the analysis.
 
 Keywords:
 tunnel, rock bolt, seismic excitation, stress state, displacements, 3D model