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Design and analysis of precast dapped-end beams
Hasa, Michal ; Navrátil,, Jaroslav (referee) ; Vítek,, Jan (referee) ; Zich, Miloš (advisor)
The doctoral thesis deals with the analysis of the dapped-end beam detail, in terms of theoretical modelling and practical design using the strut-and-tie method as well as experimental verification of the bearing capacity and the behaviour of the detail under load by means of load tests and subsequent numerical nonlinear analysis. A summary of known structural and static designs explored in the literature has been presented. In addition, the strut-and-tie method has been introduced as an appropriate tool for a consistent design of the detail, element or the whole structure. The theoretical basis for the method has been described, including the general methodology for design and analysis. Practical problems have been discussed, specifically those resulting from the known design of the analysed detail based on the German approach; its modification has been processed theoretically taking into account the practical mode of reinforcement. An experiment has been suggested with a view to verify the presented calculation procedure and the influence of the used ratio of vertical to inclined hanger reinforcement on the bearing capacity and behaviour of the detail under load. The experiment also included accompanying material tests of the concrete which were used along with the inspection certificates issued for the used reinforcement as a basis for the nonlinear finite element analysis. Based on the results, the presented design procedure can be considered safe. These results also imply that the chosen ratio of vertical and inclined hanger reinforcements has no influence on the ultimate bearing capacity within practical reinforcement, as it only influences the formation, development and final width of cracks. With the growing ratio of the inclined hanger reinforcement, the width and density of cracks decreases at all stages of loading. Owing to their limitations, primarily during the service state, it is recommended that the minimal inclined reinforcement should be used.
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Design of the speed-way bridge structure
Nádvorník, Ondřej ; Rybák, Vít (referee) ; Klusáček, Ladislav (advisor)
This Master's thesis deals with the detailed design of the supporting structure of the bridge with two sections, with the rise in the direction of the intermediate support, and cross-cut single-beam construction. The supporting structure is designed from the prestressed concrete, prestressing losses are accurately quantified. It also deals with the assessment of pillar base threshold and pilot groups. The assessment was carried out according to the limit states.
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D3 motorway bridge at km 33,588 in Slovakia
Lipovský, Václav ; Řeřucha, Kamil (referee) ; Koláček, Jan (advisor)
The diploma thesis deals with the design of a motorway bridge carrying the D3 motorway over a deep valley between Svrčinovec and Skalité. Three variants were developed for this work, from which the variant of a prestressed box girder bridge with sloping walls was selected for a detailed solution. The main superstructure was designed as a continuous structure with five spans of post-tensioned concrete. The superstructure is concreted in phases by means of an movable scaffolding system. The total length of the supporting structure is 255.50 m. The bridge is straight in plan. The analysis of the structure was carried out by means of several models that were created in Scia Engineer 21.1. The assessments of ultimate limit state and serviceability limit state were made according to valid standarts. The analysis of the structure was carried out in longitudinal and transverse directions. This thesis also includes a time dependent analysis (TDA) that takes the construciton phases into account. Finally, drawings and visualizations were produced.
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Static solution of prefabricated hall
Koníček, Jakub ; Koláček, Jan (referee) ; Zich, Miloš (advisor)
The presented thesis deals with design and optimization of selected structural elements of high-load storage hall skeleton. As a basis for the solution is taken the structure of a real storage hall designed in the years 2017-2018. The structure is designed for minimum weight. For this reason, so-called D-regions are formed on the structure. For the solution of D-areas, general methods of solution, such as STM or nonlinear FEM analyses, are used in the thesis. In the final designed structural elements are compared to the original design of the hall. Thesis include static calculation of 24 m long roof beam V1, static calculation of 24 m long ceiling beam ST1, drawing documentation and technical report. Programs were used for the calculation: SCIA Engeneer 18.1, Idea StatiCa Beam10.1, Idea StatiCa Detail 10.1, RIB Fermo, PTC MathCad and MS Excel.
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Reinforced concrete slab supported on columns
Hlavička, Martin ; Šulák, Pavel (referee) ; Požár, Michal (advisor)
The thesis deals with the practical design and assessment of monolitic, reinforced-concrete flat slab. We focus on particular sections of the object, which are then characterized by moment coefficient method and finite element method using SCIA Engineer 19.1 software. Both ultimate limit state and service limit state are evaluated as well. After that we also focused on foundation (pile head plates), selected columns both outside and at the edges of the object, and staircase. The final ouput of this work is data accompanying report, static calculation and technical drawings of the object.
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Reinforced concrete slab supported on columns
Hlavička, Martin ; Šulák, Pavel (referee) ; Požár, Michal (advisor)
The thesis deals with the practical design and assessment of monolitic, reinforced-concrete flat slab. We focus on particular sections of the object, which are then characterized by moment coefficient method and finite element method using SCIA Engineer 19.1 software. Both ultimate limit state and service limit state are evaluated as well. After that we also focused on foundation (pile head plates), selected columns both outside and at the edges of the object, and staircase. The final ouput of this work is data accompanying report, static calculation and technical drawings of the object.
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Prestressed box girder bridge
Štíchová, Kateřina ; Štefan, Petr (referee) ; Koláček, Jan (advisor)
The subject of this diploma thesis is the design of a load–bearing structure, whitch is situated in the extravillain between the town of Chomutov and the village Křimov. Main purpose of this structure is to pass a roadway I/7 across the valley. There are three options of design and one of them – the prestressed box girder bridge with slanted walls is chosen for more detailed elaboration. The major load–bearing structure is five–span with lenghts 46.50 + 58.00 + 58.00 + 58.00 + 46.50 m, made of post–tensioned nad cast–in–place concrete. The total lenght of load–bearing structure is 269.00 m and the width of load–bearing structure is 13.50 m, the bridge is straight in plan. The structure is analyzed by several computational models, which are designed in Scia Engineer 20.0 software. The structure is analysed in longitudinal and cross directions. The assessments of load state limit and usability limit state are made according to valid standards. This thesis also included time dependent analysis (TDA), that takes construction stage analysis into account.
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Multi-span highway bridge
Doležal, Lukáš ; Novák, Richard (referee) ; Koláček, Jan (advisor)
The subject of diploma thesis is designing multi-span highway bridge over Řepovský potok valley, dirt roads and biocorridor. Three variants of bridge were designed and one of them – box girder 10 span bridge, has been chosen. Bridge deck is made from cast in place post tension prestressed beam. Load-bearing structure is concreting step by step on fixed and moving support. Total length of bridge is 560 m. The analysis of structure was projected on several computational models. They have been made in software Midas Civil and SCIA Engineer 18.1. The assessments of ultimate limit state and serviceability limit state were made in all steps of building in longitudinal and cross direction. In the analysis in longitudinal direction is included the time dependent analysis. Structural design was made in software MS Excel according to valid standards. Finally, drawing documentation and visualization were made.
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Multi-span highway bridge
Doležal, Lukáš ; Novák, Richard (referee) ; Koláček, Jan (advisor)
The subject of diploma thesis is designing multi-span highway bridge over Řepovský potok valley, dirt roads and biocorridor. Three variants of bridge were designed and one of them – box girder 10 span bridge, has been chosen. Bridge deck is made from cast in place post tension prestressed beam. Load-bearing structure is concreting step by step on fixed and moving support. Total length of bridge is 560 m. The analysis of structure was projected on several computational models. They have been made in software Midas Civil and SCIA Engineer 18.1. The assessments of ultimate limit state and serviceability limit state were made in all steps of building in longitudinal and cross direction. In the analysis in longitudinal direction is included the time dependent analysis. Structural design was made in software MS Excel according to valid standards. Finally, drawing documentation and visualization were made.
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Reinforced concrete slab supported on columns
Hlavička, Martin ; Šulák, Pavel (referee) ; Požár, Michal (advisor)
The thesis deals with the practical design and assessment of monolitic, reinforced-concrete flat slab. We focus on particular sections of the object, which are then characterized by moment coefficient method and finite element method using SCIA Engineer 19.1 software. Both ultimate limit state and service limit state are evaluated as well. After that we also focused on foundation (pile head plates), selected columns both outside and at the edges of the object, and staircase. The final ouput of this work is data accompanying report, static calculation and technical drawings of the object.
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