Roman Fojtík

Dr. Roman Fojtík

orcid

Research Focus & Metrics

Academic Career Length

18Years (2009-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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23 September 2013 in Key Engineering Materials
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Radim CajkaRadim Cajka
Radim Cajka
KBKamil Burkovič
Kamil Burkovič
VBVojtech Buchta
Vojtech Buchta
RFRoman Fojtík
Roman Fojtík
State of stress in foundation structure is structure is significantly influenced by the contact stress course in the subsoil. At the Faculty of Civil Engineering VSB TU Ostrava testing device was constructed so that the phenomena could be experimentally investigated and compared with numerical models. The objective of this paper is also improving and developing the soil-structure interaction analysis based on the experimental results and finite element method (FEM).

1 January 2013 in Procedia Engineering
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Radim CajkaRadim Cajka
Radim Cajka
RFRoman Fojtík
Roman Fojtík
In the paper the method of experimental temperature and stress measurement of reinforced concrete foundation slab during construction of the National Supercomputing Centre in Ostrava, Czech Republic is described. Measured results are compared with numerical analysis and time dependent development of concrete strength. Decreasing the tensile stress in concrete by use of the sliding joint was verified

1 January 2015 in Procedia Engineering
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VBVojtech Buchta
Vojtech Buchta
MJMartina Janulikova
Martina Janulikova
RFRoman Fojtík
Roman Fojtík
Foundation structures, their testing and modelling is a wide area to research. A lot of different elements are tested or modeled in the world. Analysis of interaction between the foundation structures and the subsoil has been developed for many years. For the determination of stress in foundation structure is needed to determine the influence of the stiffness respectively pliability of subsoil to structural internal forces, and vice versa, how the stiffness of the foundation structure affects the resulting subsidence. This paper deals with experimental tests of square reinforced concrete foundation slabs on the subsoil which are carried out at the Faculty of Civil Engineering in Ostrava. Those slabs are loaded with concentric load and are mounted with string strain gauges to measure stress-strain characteristics. Pressure sensors are also mounted under slab to monitor contact stress in the subsoil. Total deformation of the concrete foundation slabs are measured too using potentiometric sensors. The tests results are compared with bending moments and deformations analysis according to subsoil models given in Eurocodes using FEM analysis. In this paper are described performed experimental test and presented as currently results from the test as results from the computing analysis on the slabs and their comparison

1 January 2012 in Procedia Engineering
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VČV. Čecháková
V. Čecháková
MRMiroslav Rosmanit
Miroslav Rosmanit
RFRoman Fojtík
Roman Fojtík
One of the typical bridge structures has been numerically modeled using finite element programs Scia Engineer and ANSYS. Main results from the numerical model were compared to those obtained from experimental testing of the structure. These numerical models were calibrated using experimental data from the static and dynamic load tests performed. Finally, future research on such structures is outlined

1 January 2012 in Transactions of the VŠB – Technical University of Ostrava, Civil Engineering Series
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MPMiroslav Pinka
Miroslav Pinka
MSMartin Stolarik
Martin Stolarik
RFRoman Fojtík
Roman Fojtík
TPTomáš Petřík
Tomáš Petřík

21 December 2022 in Forests
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JMJozef Mitterpach
Jozef Mitterpach
RFRoman Fojtík
Roman Fojtík
EMEva Machovčáková
Eva Machovčáková
LKLenka Kubíncová
Lenka Kubíncová
Through its anthropogenic activities in construction, human society is increasingly burdening the environment with a predominantly adverse impact. It is essential to try to use building materials that allow us to build environmentally friendly buildings. Therefore, this article deals with the determination of the environmental performance of a cross-prestressed timber-reinforced concrete bridge using life cycle assessment (LCA) compared with a reinforced concrete road bridge with a similar span and load. The positive environmental performance of the wooden concrete bridge was proved, with a relatively small (22.9 Pt) total environmental damage. The most significant impact on the environment is made by the wood–concrete bridge materials in three categories of impacts: Respiratory inorganics (7.89 Pt, 79.94 kg PM2.5 eq), Global warming (7.35 Pt, 7.28 × 104 kg CO2 eq), and Non-renewable energy (3.96 Pt, 6.01 × 105 MJ primary). When comparing the wood–concrete and steel concrete road bridge, a higher environmental performance of 28% per m2 for the wood–concrete bridge was demonstrated. Based on this environmental assessment, it can be stated that knowledge of all phases of the life cycle of building materials and structures is a necessary step for obtaining objective findings of environmental damage or environmental benefits of building materials or structures.