Although the use of waste materials as mineral admixtures for self-compacting concrete can contribute to solving the problem of their disposal, the effect of such use should be further explored. The influence of fly ash, powdered waste brick elementsroof tiles, flotation tailing and silica fume, on the consistency, compressive strength, bending tensile strength, and tensile splitting strength of concrete, is studied. Selfcompacting concrete mixtures test results are compared to a common concrete mixture.
During rehabilitation of residential buildings built in the first half of the
20th century, it is necessary to strengthen timber floors so they can
fulfill the requirements of strength and serviceability according to
contemporary regulations. Floors made of monolithic timber girders can be
most easily strengthened by forming a composite structure with a reinforced
concrete slab supported on a trapezoidal steel sheeting, with appropriate
connections between different materials. In the paper, the procedure of
calculation of nails used as shear connectors for composite action of timber
and concrete is presented. The procedure is based on equations given in
Eurocode 5, and besides that, a calculation applying FEM has been conducted,
and a comparison of results is presented.
Wind actions can be dissolved into two components: steady or mean action, and gust or variable action. The first component produces static load on structure, but the second produces dynamic load. The dynamic component depends on meteorological data for gusts in certain region, and on internal characteristics of the structure. Dominant design approach is to treat wind action generally as a static load. This may be unjustified for high, slender, and flexible structures like steel towers. The paper is analysing the response of a specific steel tower structure on wind actions using static approach first, and then superimposing static and dynamic load. FEM was used as a method of analysis. Results and recommendations for further treatment of similar structures are given as a conclusion.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.