Abstract. The presented paper deals with the stochastic analysis of the ultimate limit states of steel-concrete building members. The load carrying capacity of steel-concrete columns, comprising of steel profiles encased in high strength concrete, in compression is analyzed. The first part of the paper lists assumptions for the determination of the theoretical load carrying capacity of the column. Principles of elasticity and plasticity are used to determine stresses in the concrete and steel sections. Statistical characteristics of input material and geometrical imperfections are listed. Results of the theoretical analysis are then compared with results of experimental research. Statistical characteristics of obtained results of the theoretical analysis were verified using statistical characteristics obtained from experimental research. Numerical simulation LHS and Monte Carlo methods, which take into account the influences of variability of input imperfections, were employed. The influence of the utilization of the plastic reserve in the determination of the load carrying capacity of the analysed strut is shown. The influence of the initial geometric imperfections of initial strut curvature on the load carrying capacity is also presented.

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The paper is focused on the problems of the actual fatigue resistance of assembly joints of the temporary footbridge, which is newly developed in the authors workplace. The necessity of the development of a new temporary footbridge has been invoked by the lack of such constructions in a practice, both in the case of flood situations, and also as the site facilities. Within this work the attention is paid to static and structural design, mainly to the harmonization of both aspects, to achieve the efficient design. In parallel, two types of the footbridge are developed, both ones with a lower deck, truss main girders and bracings. The first structure short footbridge can reach up to 18 m span; the second structure long footbridge reaches up to 36 m span. This paper deals with some problems of the short footbridge fatigue and presents the basic information on the actual behaviour of assembly joints of the structure in the case of fatigue loading actions. The paper is focused on the fatigue tests of assembly joints including elaboration and evaluation of their main results.

In the period of several years, the research oriented to the development of particular type of glass-fibre-concrete (GFC) and to its application in buildings is continuously realized on the authors’ workplace in co-operation with the Research Institute of Building Materials (VUSTAH). The first type of glass-fibre-concrete developed by VUSTAH has been determined and produced for the utilization in façade panels especially, but currently the GFC technology and quality is developed and aimed to use it also as parts of load-carrying civil engineering structures. To investigate the actual behaviour of GFC structural components subjected to loading actions and to obtain information of their load-carrying capacities, within the frame of this research the experimental verification is realized. This paper is focused on the partial problem of the design and realization of glass-fibre-concrete façade cassette panels, that means the results of experimental verification of their actual behaviour and load-carrying capacity, if subjected to the wind loading actions, are presented.

This paper deals with the problems of the fastening of steel structures to concrete constructions using the post-installed anchoring elements. The paper is oriented to the presentation of some results of the analysis concentrated to the actual behaviour of the particular type of steel mechanical anchors, so called expansion anchors, during the loading process. Within the frame of the experimental verification, using the realized tests results and their elaboration, the load-carrying capacities for the corresponding failure mechanisms were obtained. Within the frame of the theoretical analysis, using the tests results statistic evaluation, the probabilistic models were created, for the subsequent reliability analysis leading to the derivation of the characteristic and design resistances. The problems mentioned above were solved for some selected failure mechanisms and load-carrying capacities of expansion anchors under tensile force namely, for static loading actions and eventually for dynamic loading actions.