National Repository of Grey Literature 134 records found  1 - 10nextend  jump to record: Search took 0.02 seconds. 
New procedures for evaluating concrete in existing construction
Juřenová, Jana ; Kocáb, Dalibor (referee) ; Cikrle, Petr (advisor)
This bachelor thesis seeks to increase the awareness of the possibility of using the ultrasonic pulse method for the diagnosis of building structures. It emphasises the use of non-destructive methods, highlighting their ability to provide comparable results to traditional destructive methods of assessment, whilst minimising interference to the structure. The work includes reporting on the procedures for determining the characteristic compressive strength of concrete in existing structures as defined in EN 13791, updated in 2021. The work focuses primarily on calibrating results from non-destructive indirect measurements with those obtained destructively using core borings.
Evaluation of concrete properties in the structure
Horvát, Martin ; Misák, Petr (referee) ; Cikrle, Petr (advisor)
The work deals with a completely new standard, non-destructive testing of concrete strength using ultrasonic and rebound hammers such as the Original Schmidt and SilverSchmidt. Regression relationships obtained from measurements with relationships reported in the literature are utilized.
Monitoring masonry buildings affected by the surrounding construction
Kirschbaum, Adam ; Heřmánková, Věra (referee) ; Cikrle, Petr (advisor)
This bachelor’s thesis deals with monitoring of a building object affected by a surrounding construction. In the first, theoretical part the defect of wall constructions, ways of measuring wall cracks and possibilities of a static load are described. The second, practical part deals with monitoring of a multi-storey building which was damaged by a building of a neighbouring object in the gap site. It covers the inspection and documentation of the damage and the description of the applied methods. The results of measuring are elaborated graphically and analysed in connection with interventions to the construction.
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.
Determination of the formwork strength of concrete using a Silver Schmidt hardness tester
Janka, Marek ; Kocáb, Dalibor (referee) ; Cikrle, Petr (advisor)
This bachelor thesis deal with the issues of nondestructive testing of the formwork removal strength of concrete. It works with two different compositions of concrete and for both of them, it determines the relation between compressive strength and surface hardness obtained by the SilverSchimdt hammer with mushroom plunger. It shows inappropriateness of ultrasonic impulse method to determine formwork removal strength. It compares obtained relations with each other and with the literature. The goal of this thesis is to utilize determined relations for verification of minimal requested formwork removal strength during construction.
Monitoring of buildings in relation to surrounding construction activity
Ledvoňová, Monika ; Heřmánková, Věra (referee) ; Cikrle, Petr (advisor)
This thesis deals with the monitoring of buildings disorders caused by surrounding con-struction activity. The first section describes the methods of monitoring failures, from the detailed inspection to the result evaluation, there is also given an overview of measuring instruments. The second part describes the methodology of passports implementation and contains an example of the object repassport that was violated by tunneling. There is a comparison of passport and repassport. The third largest section describes a practical ex-ample of monitoring object cracks around which the building activity took place. There is a documentation of failures, a description of the measuring spots choise, installation of the bases, monitoring, processing of results and conclusion.
Non-destructive properties detection of concrete of prestressed beams
Mikulec, Jan ; Bílek, Vlastimil (referee) ; Cikrle, Petr (advisor)
The masers’s thesis is about the methods of non-destructive testing and about determining the properties of prestressed concrete. The first part pursues an introduction on the prestressed concrete, its essence and material properties. The next section describes the non-destructive diagnostic methods used in the practical part – the ultrasound impulse method, the resonance method and the rebound hardness test method. There are described destructive tests on the specimens for the calculation of the calibration. This is followed by a practical part, which describes the item tested - truss, its manufacturing, storage, and perform the test. Then search value are calculated from the test results and results are compared according to various procedures specified in the standards. The last section is devoted to the calculation of camber truss and loss of preload.
Survey and Assessment of Masonry Buildings before Modernization
Stanislav, Štěpán ; Kocáb, Dalibor (referee) ; Cikrle, Petr (advisor)
This thesis deals with the exploration and evaluation of historic masonry building. The researched building was built in the 20th 20th century. Is located in the premises of the Philosophical Faculty of Masaryk University in Brno. During preparation for the planned modernization of the survey was conducted several objects of the university complex. In this work, however, we consider only the building named "C". It will be processed by selected diagnostic method. The findings will then serve as a basis for static analysis and follow-up activities associated with modernization.
Detection of Failures and cavities in structures using radar
Tkadleček, Petr ; Anton, Ondřej (referee) ; Cikrle, Petr (advisor)
The bachelor‘s thesis describes non-destructive testing and methods, which are used in civil engineering. It is focused on the detection of failures and cavities in concrete structures. In the first part the methods are described and compared. The second part describes experimental measurements on concrete structures, which contain failures. The results are described and interpreted. The used methods are compared. It was evaluated, which of these methods is suitable for the detection of failures and cavities in structures.
Diagnostics of Reinforced Concrete Bridge
Rozbroj, Lukáš ; Anton, Ondřej (referee) ; Cikrle, Petr (advisor)
This thesis contains diagnostics of a reinforced concrete girder bridge in the municipality of Újezd u Brna. The aim is to conduct an inspection of the bridge, gather quality photo-documentation of defects and failures and design and conduct a diagnostic examination of such extent that would be necessary for judging the load bearing capacity of the bridge. The result of this thesis is the determined load bearing capacity and a proposal of measures required to keep the bridge functional.

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1 Cikrle, P.
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