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Standardization of procedures for the brick masonry expert assessment
Kostka, Rostislav ; Myslín, Jiří (referee) ; Dohnálek, Jiří (referee) ; Hobst, Leonard (advisor)
The article is focused on the definitions of brick masonry expert assessment and brick masonry buildings assessment methodologies. The expert diagnostic procedures include building diagnostics, defects determination, static ensuring and so on. It is also necessary to choose the proper procedure of defects measurement and remediation. It is very important not to neglect the determination of costs. One of the methods that can greatly help in the process of assessing the condition of buildings is the brick masonry defects and faults monitoring with an emphasis on long-term measurements of the cracks shifts of various origin. Cracks are one of the most common disorders appearing in brick masonry buildings. In the article I compare and evaluate monitoring of the most significant cracks appearing during the excavation of Královopolský tunnel situated under Dobrovského street in Brno, where some depressions and inclinations of existing buildings had happened, as well as st. Gothard church in Brno Modřice and some masonry school building in Brno. In these selected cases the methodology of brick masonry expert assessment was verified.
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Activities of the Managing Board of an Apartment Owners Association
Vaněk, Petr ; Hobst, Leonard (referee) ; Klika, Pavel (advisor)
The diploma thesis deals with the condominiums where apartment owners association is established. The first part of the diploma thesis summarizes basic terms essential for understanding the topic. Subsequently the history of flats ownership in Czechoslovakia and later in the Czech Republic are explained. The first chapter of the analytical part focuses on the foundation of the apartment owners association, the course of the assembly of unit owners and election of a chairman and committee. The last chapter analyses the housing law of selected European country, and its result is subsequently compared to Czech legislation. Lastly, we provide a suggestion for improvement of Czech legislation and answer the questions asked in the beginning. The hypotheses that were established at the beginning are confirmer or refuted and all the results are explained.
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Financial analysis of Renewable energy
Kožík, Martin ; Hobst, Leonard (referee) ; Hrabová, Kristýna (advisor)
This thesis is focused on renewable energy sources, which are currently and increasingly used. Primarily for passive and low-energy houses. The principles that apply to heat pumps and solar collectors with thermal storage, which are suitable for new or older buildings, are described in detail. The thesis analyzes the thermal properties of the object under consideration and the proposed heat pump with its calculation and determination of the payback period of the investment in dependence on the analysis of energy price development in the las 10 years.
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The complex diagnostics of apartment building construction before reconstruction
Kocich, Tomáš ; Vítek,, Lubomír (referee) ; Hobst, Leonard (advisor)
This thesis deals with the diagnosis of a residential building from the late nineteen twenties for the needs of reconstruction. The methods generally used in the diagnosis of structures are briefly described in the theoretical part. More deeply this section describes the methods that were used during this particular research. The practical part deals with the diagnosis of the object itself. The first section describes the layout of the villa, its design solution, its faults and defects detected during the inspection. The next section deals with evaluating the current state of construction materials. Static reports of several structural parts were calculated in the last section.
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Repair and modernization of a three-room apartment in a tenement house from 1933
Gábová, Hana ; Klika, Pavel (referee) ; Hobst, Leonard (advisor)
This diploma thesis deals with the assessment of a current state of a flat and subsequently its economical repair and modernization. The aim of the thesis is to refurbish the flat in such a way that it meets the requirement of current standard of living and at the same time it is suitable for rent. Other costs will be taken into consideration and subsequently I will calculate the expected payback period. Lastly, I will evaluate whether it is worthy to realize the suggested improvements in practice.
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Activities of the Managing Board of an Apartment Owners Association
Vaněk, Petr ; Hobst, Leonard (referee) ; Klika, Pavel (advisor)
The diploma thesis deals with the condominiums where apartment owners association is established. The first part of the diploma thesis summarizes basic terms essential for understanding the topic. Subsequently the history of flats ownership in Czechoslovakia and later in the Czech Republic are explained. The first chapter of the analytical part focuses on the foundation of the apartment owners association, the course of the assembly of unit owners and election of a chairman and committee. The last chapter analyses the housing law of selected European country, and its result is subsequently compared to Czech legislation. Lastly, we provide a suggestion for improvement of Czech legislation and answer the questions asked in the beginning. The hypotheses that were established at the beginning are confirmer or refuted and all the results are explained.
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Repair and modernization of a three-room apartment in a tenement house from 1933
Gábová, Hana ; Klika, Pavel (referee) ; Hobst, Leonard (advisor)
This diploma thesis deals with the assessment of a current state of a flat and subsequently its economical repair and modernization. The aim of the thesis is to refurbish the flat in such a way that it meets the requirement of current standard of living and at the same time it is suitable for rent. Other costs will be taken into consideration and subsequently I will calculate the expected payback period. Lastly, I will evaluate whether it is worthy to realize the suggested improvements in practice.
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Cost Analysis of Repairs and Maintenance of an Apartment Building in Brno
Staňková, Pavla ; Hobst, Leonard (referee) ; Klika, Pavel (advisor)
The aim of this diploma thesis will be to create a plan for maintenance and repairs of the building on the street of the brothers Čapků in Brno. The first part will describe the individual concepts dealing with the life of individual structural elements, maintenance and repair and revisions of dedicated technical equipment. The second part will be focused on practice. A plan for maintenance and repairs of the building structures and a plan for revisions and inspections on the dedicated technical equipment will be prepared for the given building. The proposed plan will be designed to spread the funds over the whole period considered.
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Use of thermographic methods for diagnostics of concrete bridges
Janků, Michal ; Hobst, Leonard (referee) ; Matula, Radek (referee) ; Cikrle, Petr (advisor)
This dissertation is focused on the research of the applicability of the thermographic method in the diagnosis of concrete bridges in the Czech Republic. The theoretical part characterizes selected defects of concrete structures and the principle of their detection. The practical part describes the measurements made in the laboratory on the test specimen and the field on the concrete bridge. Most attention is paid to infrared thermography, ground-penetrating radar and ultrasonic pulse-echo method. Based on the results of the dissertation, recommendations for the use of the thermographic test method in practice were developed.
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Development and use of non-destructive testing methods from the point of view of forensic engineering
Bílek, Petr ; Vala, Jiří (referee) ; Vodička, Jan (referee) ; Hobst, Leonard (advisor)
Concretes reinforced by, using distributed steel reinforcements (fibres) are known as fibre-concrete. In case of disturbances or accidents of concrete structures reinforced with wires, it is necessary to carefully examine the actual implementation of dispersed reinforcement. Fibre concretes belong to modern building materials whose possible applications have not been fully utilized so far. Have been mainly used for floor structures loaded with factory halls and warehouses. Recently, thanks to well-known physical and mechanical properties of fibre-concrete, there were numerous attempts of designers, and namely investors, to utilize this kind of materials for support structures either. Favorable properties of wire-concrete can be utilized if there is a necessity to increase the resistance of concrete to stresses exceeding its strength, cyclic stress or impact stress. Daily practice shows to prove that the applications of fibre-concrete in such structures lead to the economic success. Necessary condition for successful application of steel fiber reinforced concrete in constructions however consists in its uniform dispersion, a homogeneous distribution of the wires throughout the volume of the structure. In case of inappropriate processing and deposition of the mixture during the manufacturing process fiber-concrete structures, the fibers are often unevenly distributed. Wires itself represent unfavourably shaped mixture components and they are extremely deteriorating its workability. A grouping of wires may be encountered as well, which reduces the overall homogeneity and the quality of steel fiber-concrete structures. If the homogeneity of fibre-concrete is not kept, the material possess different properties in various parts of the structure (for example, tensile strength), which can lead to defects in the structure (generation and development of cracks). The relevant lower reliability of the structure which is caused by unequal distribution of fibres (wires) in concrete volume can lead to damage of the property as well as the safety and the human lives can be jeopardized. Hence it is necessary to secure the effective control of the fibre-concrete homogeneity in ready support fibre-concrete structures. Contemporary homogeneity control is still ongoing on fresh blends, but if the fibre-concrete hardened and is a part of the construction, no known reliable methods are currently in available to test the homogeneity of the fibre-concrete on the structure without its destruction. The methods developed to control the concentration of wires in wire-concrete structures are based mostly on magnetic or electromagnetic properties of wires. The thesis deals with the development of the magnetic method in situ using permanent magnets for monitoring the distribution of fibers in hardened steel fiber-concrete structures. The test principle is based on measurements of the changes in magnetic field strength of permanent magnets which are induced by a change in wire distribution in steel fibre-concrete structure. Test is characterized as a so called local- failure- test using a small diameter core drill. In this sense it is a semi-destructive method.
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