György Farkas

Experimental Results on Masonry Infilled RC Frames for Monotonic Increasing and Cyclic Lateral Load

The main goal of this paper is to present an executed research experiment, planned to include a group of 15, one-third scale, one-bay, two-storey reinforced concrete (RC) frame specimens infilled with masonries with different stiffness. The aim of the complete research experiment was to analyse, in accordance with the international scientific research trend, the behaviour of masonry infilled concrete frames for earthquake action, particularly for cyclic lateral loading under and over the appearance of the main continuous diagonal, corner-to-corner cracks. In the first step the infilled frames were loaded in one direction with monotonic increasing lateral loads. In the second step of the research the infilled frames were investigated in two lateral directions in cases of cyclic top loading with different load histories. This paper shows the conclusions of the experimental programme.

Parametric Study of the Elementary Segment of an Antiprismatic Pop-Up Deployable Lattice Column

Abstract In this article the primary segment of an antiprismatic pop-up mast is analyzed, that can be applied for largely flexible architectural designs, like deployable bridges or transportable look-out towers. This deployable column, consisting of rigid plates, rigid and elastic bars, is characterized by its selfdeploying behavior due to the energy accumulated from lengthening the elastic bars during packing. The main goal of this paper is to prepare the analysis of the complex structure by a herein detailed investigation of the behavior of one, basic element of the deployable mast. After the analytical examination of the general behavior of the basic segment a geometrically nonlinear finite element formulation is used to trace the force-displacement diagram. Besides the parametric study, approximations of main mechanical parameters are herein given for facilitating preliminary design of such deployable structures.

THE SUPERCONCRETE AND ITS APPLICATION IN THE FIELD OF BRIDGE CONSTRUCTION INDUSTRY IN HUNGARY

This paper deals with application of high strength concrete in Hungarys bridge construction industry and the adoption of the Eurocode series. A comparison was carried out by analyzing the safety level of concrete bridge structures designed according to the Hungarian codes of the 20th century with that represented by the Eurocode. The main aspects and tasks of the current Hungarian concrete technology are summarized. Lastly, a proposal concerning the partial safety factor of high-strength concrete is presented.

Comparative analysis on using EUROCODE and two national codes in concrete bridge design

ABSTRACT The integration of the European countries and their economies also includes the harmonization of national standards. The main result of this harmonization will be the EUROCODE, a global standard system covering all fields of civil engineering. Prior to the completion and the collective use, it is necessary to make lots of comparative studies between the present national standards and the appropriate parts of EUROCODE. For this purpose, this paper presents comparative static calculations of two reinforced concrete bridges carried out on the basis of EUROCODE, the Hungarian Standard and the British Standard. The results also provide a good opportunity for analysing the required levels of safety prescribed by these standards.