|
|
Swedish and US AR mixture design comparison
Puda, Adam ; Frýbort, David (referee) ; Kudrna, Jan (advisor)
This master's theseis deals with comparison of two design concepts for producting asphalt mixture with CRmB. These design concepts are from Sweden and USA. The theoretical part sets parameters for design of asphalt mixture and chracteristic tests. In the practical part test speciements of design asphatl mixture undergo performace tests that simulate climate and traffic load. Results are compared to mathematical model used in program LayEps.
|
|
|
Modelling of damping devices in interaction with a structure
Kalina, Martin ; Lehký, David (referee) ; Frantík, Petr (advisor)
The aim of my master’s thesis was to create models of the damping device and observing their behavior in interaction with the structure. First was the construction separately modeled with Java application named FyDiK2D like a model with one degree of freedom. Model of construction takes form like a high, thin rod with full circular cross section. The lower part was restrained into the subsoil. The design was to verify the correct functionality of the model by comparing the analytical and numerical solutions. For capturing the precise behavior of the structure was converted to a multi-stage model. Then the pendulum damper was applied on this construction and found amplitude lies in highest point of multi-stage model. He was then replaced by tuned mass damper. By comparing these amplitudes from both dampers was found which kind of damper is efficient for multi-stage model.
|
|
| |
|
|
Stiffness characteristic of front part of the vehicle
Coufal, Tomáš
So far, in the field of forensic engineering was used to describe the stiffness of the front part of the vehicle only central stiffness characteristic that can be used with sufficient accuracy for frontal crash with a full overlap. However, if the vehicle crashes with only partial overlap so can be central stiffness characteristic limitations in the accuracy of the calculation of the deformation energy. The present article deals with the stiffness of the each parts of the front part of the vehicle for their use in forensic expert practice. Stiffness characteristics was processed for each part of the vehicle, with which you can calculate the exact deformation energy for a specific front part of the vehicle which was damaged in a frontal collision.
|
|
| |
|
|
Radial gantry crane
Dvořák, Milan ; Pokorný, Přemysl (referee) ; Malášek, Jiří (advisor)
The goal of this Bachelor’s Project is to develop a structural design of special construction of Radial Gantry Crane by entered parameters, it will be used in enclosed space to manipulation with various materials. The structural design will be done by basic set parameters, which as geometrically, so statically they declare workspace in industrial hall or industrial workshop and subsequent manipulation of worker with a construction crane during operation. As each design of machines, so and structural design of Radial Gantry Crane is based on the strenght design calculations, from which follows the choise of suitable material, which declares the cost of production and operation of Radial Gantry Crane. Special attention will be given to alternative designs mobile supports, whose basic parameters such as stiffness, weight and shape determine the size of the frictional forces between the wheels and the floor rails mobile workspace, implying stress of the whole structure Radial Gantry Crane when operating in loaded condition.
|
|
|
Resistance of the roof structure loaded with photovoltaic panels
Holoubek, Jan ; Bažant,, Zdeněk (referee) ; Strnad, Jiří (advisor)
The aim of the thesis is to verify the resistance of the roof structure loaded with photovoltaic panels. On the roof of industrial building of rectangular plan with dimensions of 26,5 x 24,5 m in Hlinsko, the investor decided to install photovoltaic panels. Preliminary diagnostic survey showed only flexural reinforcement in the field of all considered load-bearing elements. Bending strength was assessed by these structural elements: reinforced concrete slab, reinforced concrete beam, reinforced concrete grinder. Static calculation includes a minimum reinforcement of support and necessary shear reinforcement, which must be demonstrated by a detailed diagnostic survey. The structural analysis includes the assessment of reinforced concrete beam deflection after loading. All assessments were performed according to currently valid Eurocodes. The calculation showed that all supporting elements meet the bending resistance and deflection of the beam is smaller than the limit value laid down in the EC, so the roof of the hall can be loaded with photovoltaic panels.
|
|
|
Lapped scarf joints for repairs of historical structures
Kunecký, Jiří ; Fajman, P. ; Hasníková, Hana ; Kuklík, P. ; Kloiber, Michal ; Sebera, V. ; Tippner, J.
This guideline presents a description of the repair of timber structures using a prosthesis scarf joint designed for the replacement of damaged parts of beams. This new scarf joint makes use of the strutting effect of inclined contact faces where the forces are transmitted through wooden coupling elements - wooden dowels or keys. The scarf can be modified in four variants according to the relevant stress and is suitable for historically valuable timber structures. It meets both functional and aesthetic requirements. The designer - structural engineer will learn in the methods the load bearing capacity or stiffness of the beam with the designed joint, its recommended dimensions and detailed geometry. The contractor will appreciate the description of the execution and maintenance of the joint.
Fulltext: content.csg -  PDF
Plný tet: 0459382_2016_Kunecky_et_al_Celodrevene_platove_spoje_pro_opravy_historickych_konstrukci - PDF
|
|
|
Designing of all-wooden carpentry joints for reconstruction of historical structures
Kunecký, Jiří ; Hasníková, Hana ; Fajman, P. ; Tippner, J.
The article introduces the new method „Lapped Scarf Joints for Repairs of Historical Structures“ that deals with the design of the lapped scarf joint suitable for the reconstruction of valuable historical timber structures, with help of making the prosthesis for the damaged parts of the beams. The method is the result of the four-year research project supported by the Czech Ministry of Culture within NAKI program. Institute of Theoretical and Applied Mechanics AS CR, Faculty of Civil Engineering CTU and Faculty of Forestry and Wood Technology of Mendel University participated on the research.
|
|
| |
guest ::
