The research in all fields of the program has been included into international cooperation within either European research framework programs or bilateral international cooperation, which implies a wider significance of research results. In the field of construction, even the basic research is of applied and/or objective-oriented character. The scientific methods of basic research are modified for the specific purposes of construction research, the goal in most cases being the direct application of research findings in the form of new design methods, materials and technologies as well as relevant recommendations, which is the basis for technical regulations, such as standards and codes. In the field of structures, the conditions under which new materials and technologies can be used, and the possibilities of improved use of traditional materials, are investigated. The results of research into the solving the problems related with the ageing of buildings and civil engineering structures as well as with the preservation of the architectural cultural heritage, are important just as well. Last but not least, the results of research related with solving the environmental problems are of paramount importance. Therefore, although the results of research are important for the development of science, they are even more important for the generation of knowledge and improvement in technology in the field of construction, resulting in the improvement of the built environment. In the field of earthquake engineering, it has been shown that the modern brittle hollow ceramic masonry units with improved thermal properties are not suitable for the construction of buildings in seismic zones. If the masonry units exhibit brittle local failure when subjected to seismic loads, the commonly used equations derived under the assumption of robust behaviour of units have no validity. Besides, the energy dissipation capacity of such buildings is significantly decreased. By investigating the seismic behaviour of models of masonry buildings on the shaking table, it has been found that the structural behaviour factor does not only depend on the system of construction, but also on the quality of materials and structural configuration. It has been also found, that seismic isolation alone does not necessarily provide adequate seismic resistance of the upper structure. In the field of structures, the values of parameters needed for the numerical modelling of glued laminated timber elements in the environmental conditions have been determined. Also, the processes of initiation of rupture of steel due to stress caused corrosion have been determined. In the field of fire engineering, the behaviour of steel frames and aluminium cupolas for liquid fuel tanks exposed to fire has been successfully numerically simulated. A weigh-in-motion system has been developed and installed at home and abroad. In the field of geotechnics, a method for the determination of shear properties of soils subjected to changing dynamic loads has been developed and improved equation for correlation between the shear modulus and limit volumetric strain has been proposed.