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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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Strength and deformation analysis of parametric family of hydraulic stretchers
Jagoš, Jiří ; Vosynek, Petr (referee) ; Petruška, Jindřich (advisor)
The master thesis is focused on an evaluation of a preload lost in a tappered joint. The analyzed bolts are preloaded by a hydraulic tensioner. When the tensioner is removed, the joint is established and the preload in bolt is decreased. The analysisis carried out on axisymmetry model of joint in ANSYS Workbench 15, a finite element method is implemented in that software. The evaluation of the preload lost is made for a used range of ratio of clamped length to a nominal diameter of bolt. Geometry and material assumptions are defined. Before preloading of bolts to a desired value the process of stabilization preloading must be done otherwise outlines of the analysis are not applicable. On the base of the outlines of the analysis, the method for analytical computing of the desired pretension is done. The method involves the preload lost, which occurs due to establishment of the joint. The strength assesment of the hydraulic tensioner for bolts M72x4 is done. A 3D model of the tensioner with one plane of symmetry was used. Strength criteria for maximum allowed linear-elastic stress are in accordance with ČSN EN 13 445-3.
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Bridge over a local road and a brook
Zifčák, Karel ; Zich, Miloš (referee) ; Nečas, Radim (advisor)
The subject of this bachelor’s thesis is to study the bridge with a span of 24 meters, which bridges the local road and creek. The work focuses on the design window sill beam supporting structure with parabolic main beams connected to each other deck plate. The aim of the work is at the beginning study of three variants of possible bridges, the most suitable of them is selected and then static solution. Calculations of load effects are dealt with SCIA ENGINEERING 2013.1. a proposal is made according to standards EN.
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Strength and deformation analysis of parametric family of hydraulic stretchers
Jagoš, Jiří ; Vosynek, Petr (referee) ; Petruška, Jindřich (advisor)
The master thesis is focused on an evaluation of a preload lost in a tappered joint. The analyzed bolts are preloaded by a hydraulic tensioner. When the tensioner is removed, the joint is established and the preload in bolt is decreased. The analysisis carried out on axisymmetry model of joint in ANSYS Workbench 15, a finite element method is implemented in that software. The evaluation of the preload lost is made for a used range of ratio of clamped length to a nominal diameter of bolt. Geometry and material assumptions are defined. Before preloading of bolts to a desired value the process of stabilization preloading must be done otherwise outlines of the analysis are not applicable. On the base of the outlines of the analysis, the method for analytical computing of the desired pretension is done. The method involves the preload lost, which occurs due to establishment of the joint. The strength assesment of the hydraulic tensioner for bolts M72x4 is done. A 3D model of the tensioner with one plane of symmetry was used. Strength criteria for maximum allowed linear-elastic stress are in accordance with ČSN EN 13 445-3.
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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.
|
|
|
Bridge over a local road and a brook
Zifčák, Karel ; Zich, Miloš (referee) ; Nečas, Radim (advisor)
The subject of this bachelor’s thesis is to study the bridge with a span of 24 meters, which bridges the local road and creek. The work focuses on the design window sill beam supporting structure with parabolic main beams connected to each other deck plate. The aim of the work is at the beginning study of three variants of possible bridges, the most suitable of them is selected and then static solution. Calculations of load effects are dealt with SCIA ENGINEERING 2013.1. a proposal is made according to standards EN.
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