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Wage rigidities in chosen EU countries
Janus, Ondřej
The objective of this thesis is to estimate the real wage rigidities in chosen EU countries and their influence on long term unemployment. Two main approaches used in this thesis are multiple regression analysis applied on Phillips curve and Structural VAR. The results show the development of wage flexibility before and after the crisis, heterogeneity of wage flexibility across the chosen EU countries and positive correlation between wage flexibility and low long-term unemploy-ment rate.
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Bond between FRP reinforcement and concrete
Januš, Ondřej ; Hradil, Petr (referee) ; Materna, Alois (referee) ; Štěpánek, Petr (advisor)
Recently, FRP (fibre reinforced polymers) materials are increasingly used in concrete structures, both for the strengthening of existing structures and as an internal reinforcement of concrete elements. It is due to convenient mechanical and physical properties of this kind of material. However, the use of these innovative materials as a reinforcement of concrete structures often requires a modification of the design process used for steel reinforcement. At present, a large number of bridge structures are in a very poor condition and require remediation due to corrosion of the steel reinforcement. Composite reinforcement appears to be a suitable alternative to steel reinforcement in these application areas. However, since bridge decks are directly exposed to repeated traffic loads, fatigue assessment is an important and often crucial part of the design. The number of studies dealing with the fatigue behaviour of internal FRP reinforcement is currently very limited. In particular, there is currently no study that sufficiently deals with the comprehensive determination of the effect of fatigue loading on the bond between FRP reinforcement and concrete. The doctoral thesis deals with the design of concrete elements reinforced with modern composite FRP reinforcement exposed to high-cyclic (fatigue) loading. Thanks to the performed extensive experimental programme, it was possible to determine the permissible limit values of fatigue load to ensure the required fatigue life. Based on these limiting values, the design and subsequent fatigue testing of full-scale concrete roofing slabs intended for aggressive environments was performed.
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The use of internal composite reinforcement in the design of durable concrete structures
Koriťáková, Martina ; Januš, Ondřej (referee) ; Girgle, František (advisor)
The diploma thesis deals with processing of determining the shear strength of concrete structures reinforced with composite reinforcement, subjected to shear force, according to five different design approaches. The theoretical part of the thesis is closely related to the project FW01010520 - "Development of bent composite reinforcement for environmentally exposed concrete constructions", which is realized at the Institut of Concrete and Masonry Structures, Faculty of Civil Engineering, Brno University of Technology. The project deals with the shear strength of concrete beams reinforced with steel and composite reinforcement in various combinations. Then the load-bearing results gained within the project are compared with the values obtained by calculations according to the solved design approaches and computer software Atena Science. The second part of the diploma thesis deals with the static design and assessment of the cell structure. The cell is designed as a room inside of the medical building, where is placed device of magnetic resonance which is the reason why the cell is reinforced with non-magnetic composite reinforcement.
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Load-bearing reinforced concrete structure of a family house
Borovec, Michael ; Januš, Ondřej (referee) ; Zlámal, Martin (advisor)
The final thesis is focused on designing reinforced concrete load-bearing structures of a detached house on two floors and one basement. In the basement will be located the storages, utility room and wine bar. On the ground floor will be located garage for two cars, living room with kitchen and study. On the second floor will be located bedroon and two child’s rooms. The ceiling slab of the second floor, the ceiling slab of the ground floor, the ceiling slab of the basement, spiral staircase, half-turn staircase and walls of the first underground floor with solution as water-resistant construction. Programs SCIA Engineer 21.1 and Dlubal RFEM are used to calculate the internal forces. To varify the accuracy of the results is used manual calculation. The work includes drawings of formwork and reinforcement of the all designing structires. The bulding is designed according to ČSN EN 1992-1-1.
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Concrete structures with FRP reinforcement
Valent, Matej ; Januš, Ondřej (referee) ; Girgle, František (advisor)
The bachelor thesis deals with the usage of FRP reinforcement in concrete structure designs. The designed structure is a sedimentation reservoir that consists of two prefabricated segments. The construction is classified into the XC4 exposure category. The theoretical part of the thesis provides an overview and explains particular types of FRP reinforcement, their properties, and mechanical durability. We describe GFRP reinforcement and its design for bending and shear, consecutively providing different approaches in a plan for a short-term or long-term carrying capacity. The experimental part of the thesis contains two alternatives. The first application involves B500B reinforcement in both prefabricated segments, while the second part, it is using Schöck ComBAR® reinforcement instead. Moreover, both possibilities and their design take into consideration the ultimate limit state. Subsequently, the obtained results are compared. The experimental part of the thesis includes calculations as well as drawings documentation.
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Design of concrete structures reinforced with non-metallic FRP reinforcement
Golisová, Michaela ; Januš, Ondřej (referee) ; Kostiha, Vojtěch (advisor)
This diploma thesis investigates the design of concrete structures reinforced with non-metallic FRP reinforcement with a focus on solving the bearing capacity in extrusion. The work is divided into a theoretical and a practical part. The theoretical part begins with an introduction to FRP reinforcement and a description of shear stress. The following is an introduction to current approaches dealing with this issue. In the practical part, in connection with these regulations, parametric studies are developed to compare the influence of individual input parameters and selected regulations. The last part is dedicated to the design and nonlinear analysis performed in the ATENA software.
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Use of composite materials for the design of concrete structures
Vašátko, David ; Januš, Ondřej (referee) ; Girgle, František (advisor)
Composite reinforcement tends to be perspective material for construction reinforcing. Its application is suitable especially for areas with high level of environmental stress, or environment loaded with physical phenomenon. This thesis is focused on inner FRP reinforcement. Theoretical part deals with mode of production, types of used materials, behavior depending on stress type and different approaches towards designing for short-term or long-term load capacity of composite reinforcement. Practical part includes assessment of precast element, dealing with requirement of non-magnetic reinforcement. Assessment is designed with two alternatives, each of them differing in type of main load-bearing reinforcement. First one works with stainless steel reinforcement, the second one with GFRP one.
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Design of concrete structures using modern composite materials
Badány, Kristián ; Januš, Ondřej (referee) ; Kostiha, Vojtěch (advisor)
In the first part, this work deals with basic information about non-metallic reinforcement and its general design, in the second part the prefabricated supporting wall is assessed. The support wall is designed in several variants: in the first variant for classical reinforcement reinforcement and in other variants it is for composite reinforcement. The entry of the support structure is the same for all variants. Calculation is processed by Fib Bulletin No. 40 and complies with ČSN EN.
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Design of concrete structures reinforced with FRP reinforcement
Bártová, Denisa ; Januš, Ondřej (referee) ; Girgle, František (advisor)
The thesis deals with design of a FRP reinforced concrete structure. The structure is a two way floor slab designed in two ways. The first one is typically reinforced concrete; in the second, the upper reinforcement is replaced with a FRP reinforcement. Ultimately, both variations are compared at the end. The floor structure is located in exposure class XD1. The thesis includes a structural design as well as drawings. All calculations were performed in accordance with Eurocode 2 and Fib. Bulletin No. 40.
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