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Analysis of fracture of quasibrittle materials using numerical modelling and acoustic/electromagnetic emission
Vodák, Ondřej ; Vořechovský, Miroslav (referee) ; Veselý, Václav (advisor)
This master thesis gives overview of non-destructive tests of concrete and provides detailed information concerning the acoustic and electromagnetic emission during monitoring of concrete failure. Conducted loading tests of plain concrete specimens are described in the thesis together with the performed numerical simulations of these tests in the software ATENA. The simulation results of concrete failure are analysed in detail and compared with the experimental results recording failure processes with the help of acoustic and electromagnetic emission. The majority of simulation results in software ATENA 3D show good agreement with the recorded data.
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Strengthening of reinforced concrete frame structure
Jelínek, Tomáš ; Laníková, Ivana (referee) ; Šimůnek, Petr (advisor)
This thesis reviews a strengthening of reinforced concrete column in frame structure. The column is strengthened with angles and battens. This work is divided into three parts. In the first part there is chosen an appropriate theoretical model. In the second part there is described every step of the design and the assessment which is based on two assumptions. Angles are expected to carry a part of load directly. Concrete is confined with battens. Therefore we can expect better deformation characteristics. There was also used a program ATENA 3D to elucidate one of the problems. The third part consists of designing and assessment of a particular column.
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Experimental and numerical analysis of load test concrete slabs
Jedlička, Lukáš ; Láník, Jaromír (referee) ; Žítt, Petr (advisor)
This bachelor’s thesis describes a design, making and experimental load test of reinforced concrete element, which has been selected as a slab. The part of laboratory work was production of testing ensembles and assessment of their physical and mechanical properties. The data from experiment were compared with the results of simulated load test in software Atena 3D, that is using for nonlinear analysis the finite element method. All results were compared with numerical analysis from valid norm.
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Nonlinear analysis of reinforced concrete foot failure
Dubina, Radek ; Václav,, Veselý (referee) ; Eliáš, Jan (advisor)
Reinforced concrete monolithic feet are one kind of shallow foundation used mainly under column systems. These systems transfer the load from upper floors through columns to the feet and through them to the foundation soil. Interaction between the foot and the foundation soil plays an important role due to the system sensitivity to the uneven settlement. Feet has to resist shear induced by vertical force and bending moment caused by stress in footing bottom. The work is devoted to design of the foot according to European standard Eurocode 2. It is then focused on numerical simulation of foot failure and calculation of the corresponding maximal vertical force in the column using a 3D model with nonlinear material models of subsoil, reinforcement and concrete. The calculations are done in software ATENA 3D for different variants of subsoil, reinforcement and foot shape. Results according to European standard and nonlinear analysis are compared.
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Experimental and numerical analysis of load test concrete slabs
Jedlička, Lukáš ; Láník, Jaromír (referee) ; Žítt, Petr (advisor)
This bachelor’s thesis describes a design, making and experimental load test of reinforced concrete element, which has been selected as a slab. The part of laboratory work was production of testing ensembles and assessment of their physical and mechanical properties. The data from experiment were compared with the results of simulated load test in software Atena 3D, that is using for nonlinear analysis the finite element method. All results were compared with numerical analysis from valid norm.
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Nonlinear analysis of reinforced concrete foot failure
Dubina, Radek ; Václav,, Veselý (referee) ; Eliáš, Jan (advisor)
Reinforced concrete monolithic feet are one kind of shallow foundation used mainly under column systems. These systems transfer the load from upper floors through columns to the feet and through them to the foundation soil. Interaction between the foot and the foundation soil plays an important role due to the system sensitivity to the uneven settlement. Feet has to resist shear induced by vertical force and bending moment caused by stress in footing bottom. The work is devoted to design of the foot according to European standard Eurocode 2. It is then focused on numerical simulation of foot failure and calculation of the corresponding maximal vertical force in the column using a 3D model with nonlinear material models of subsoil, reinforcement and concrete. The calculations are done in software ATENA 3D for different variants of subsoil, reinforcement and foot shape. Results according to European standard and nonlinear analysis are compared.
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Analysis of fracture of quasibrittle materials using numerical modelling and acoustic/electromagnetic emission
Vodák, Ondřej ; Vořechovský, Miroslav (referee) ; Veselý, Václav (advisor)
This master thesis gives overview of non-destructive tests of concrete and provides detailed information concerning the acoustic and electromagnetic emission during monitoring of concrete failure. Conducted loading tests of plain concrete specimens are described in the thesis together with the performed numerical simulations of these tests in the software ATENA. The simulation results of concrete failure are analysed in detail and compared with the experimental results recording failure processes with the help of acoustic and electromagnetic emission. The majority of simulation results in software ATENA 3D show good agreement with the recorded data.
|
|
|
Strengthening of reinforced concrete frame structure
Jelínek, Tomáš ; Laníková, Ivana (referee) ; Šimůnek, Petr (advisor)
This thesis reviews a strengthening of reinforced concrete column in frame structure. The column is strengthened with angles and battens. This work is divided into three parts. In the first part there is chosen an appropriate theoretical model. In the second part there is described every step of the design and the assessment which is based on two assumptions. Angles are expected to carry a part of load directly. Concrete is confined with battens. Therefore we can expect better deformation characteristics. There was also used a program ATENA 3D to elucidate one of the problems. The third part consists of designing and assessment of a particular column.
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