Diploma thesis describes the design and assessment of roof structure that covers entrance of the shopping center. Structure has an irregular floor plan and roof height is 16.5 m. The material of the structure is steel S355. The construction is located in Hradec Kralove. Two options were processed that were designed and evaluated according to applicable standards. The work also includes the design of anchoring and selected joints.

The load-carrying steel structure of the shopping centre is proposed in two versions. The more advantageous version is elaborated in detail. The roof structure is designed using three-dimensional curved trusses with glass roofing and the structure rests on steel columns. The ground plan dimensions of the steel structure are 120 by 73 meters.

Titanium and aluminium alloys are among the most used construct materials due to their physical and mechanical properties except steels. The joining of these alloys can improve properties of whole construction but it is still difficult task. Especially welding of titanium and aluminium alloys is difficult cause formation of undesirable intermetalic phases in the weld. This thesis focuses on influences of electron beam welding parameters especially focusing and deflection of beam and preheating of base material to quality of heterogeneous join of titanium alloy Ti6Al4V and aluminium alloy EN AW-6061 – T651. There is described preparation of welded joins and brazed joins in the thesis, which are evaluated by light microscopy, scanning electron microscopy and EDS analysis of chemical composition. There was evaluated presence and chemical composition of formated intermetalic phases in the welded joins and quality and defects in the brazed joins.

This thesis deals with principles of thermochromism and its possible applications in heat distribution testing. Theoretical part describes mechanisms which allow the thermochromic properties of the substances. Particular attention is paid to cholesteric liquid crystals. Ability to measure the heat for this type of liquid crystals was varified. Also long service life in high humidity environment, enviroment with intense UV radiation, cyclic changes in temperature or immersion in water was tested. A possibility of their practical use in diagnosis was verified as well. Specifically mapping of heat distribution on an assembled PCB. Conclusion contains comparison and evaluation of this method in terms of accuracy, user comfort and economic advantages compared to conventional infrared sensors.

Master’s thesis in the theoretical part analyses the heating factor (Q), which has significant share on quality of a solder joint. The practical part describes the design and production of test PCB and setting temperature profiles, SMD resistors soldering by using BiSn solder paste. Shear tests of SMD solder joints were realised and evaluated including isothermal ageing samples. At the end of master’s thesis solder joints visual aspects and defects were evaluated, measurement thickness of intermetallic compound by not only optical microscope but also SEM, discussion about results and Q was evaluated.

The diploma thesis deal with design of a technological building in Ostrava serving for the sorting of slag to enagle its sequential use. Geometry of the structure was customized to technological requests. Static system was considered in two versions – joint connections with vertical bracing and omni-directional frame. For detail processing was chosen the joint one, besause it showed up as more advantageous. Static calculation was performed by Scia Engineer 14 software, then some typical connections and drawings were manually designed.

The subject of the diploma thesi is the design and assessment of the pavilions supporting structure for exhibition and other purposes. The building is located close to Zlin. Preliminary designs of supporting structure were created. One of these was selected and detaileddesigned and assessed. Generallythere are two structures that are extended between themselves. A design and assessment of the entrance portal for the exhibition pavilion was created. The entrance portal is an atypical structure that was created from a combination of hyperboloid and cylinder. The entire portal is formed of welded parts and it is completely from glass. The entrance portal has a variable height, where the highest point is 8,258m. The entrance portal is 20,394m long and has a variable width, where the largest width is 12,000m. The exhibition hall, which is located behind the entrance portal was designed from flat arched truss trusses. The arched trusses are made of several radii and hasa overall impression of an elliptical truss. The trusses have a range 37,000m and they are axially distant 6,000m. The height of the arched trusses is 10.530m. In the leading position of the construction were designed pillars and construction for possible connection of the entrance portal, or for the location of the gate system. Whole construction of the exhibition pavilion, without the entry portal, is 54,000m long and 37,000m wide. The built-up area of both structures is approximately 2200m2. Construction are designed according to normative requirements of CSN EN for limit state of load capacity and usability. The main material of the supporting structural parts was used S355JR steel.

The aim of this diploma thesis is to compare mechanical properties of welded joints on tubes from 32x2 mm. Tubes are made from 25CrMo4 steel, which is used for production of racing kart chassis. The steel has a tensile strength of Rm = 800 MPa and up to 1200 MPa after refinement. For welding of samples are used technologies MAG and TIG.

The subject of the thesis was the design of a multi-storey office building. In the transverse direction the building was designed as a three-tract 6.0 + 4.0 + 6.0 = 16 m. In the longitudinal direction 9x6.6 m = 59.4 m. The design was designed in several variants: articulated and frame in transverse directions. The joint variant was selected for detailed analysis.

The problematics of weldability of heterogeneous welds of aluminium and titanium alloys produced by electron beam welding is discussed in this work. Homogenous welds of selected alloys were analyzed in the first stage. Welding of these materials relates to formation of intermetallic phases at the interface of base materials due to differences in physical, chemical and metallurgical properties of base materials. One of the prerequisites for producing high quality weld joints is to find optimal process parameters. The influence of selected process parameters to integrity, structure and mechanical properties of heterogeneous Al/Ti joints is evaluated.