48 research outputs found
Finite difference method application in design of foundation girder of variable cross-section loaded on ends
No full textDrama work of Verka Škurla-Ilijić
No full textVerka Škurla-Ilijić is not a widely acknowledged author although her writing marked by details and images should testify to her artistic value. This particularly refers to her prose writing containing some memorable pages, while her dramatic contribution is quite modest and remains remembered more for its contested nature and polemical echoes, than for its value and the part it played in the development of Croatian drama. Both of her plays, Part of the Road (Komad puta) and On Thin Ice (Na tankom ledu), represent facts of dramatic history rather then being an experience marked by a relevant semantic potential. This paper on Verka Škurla-Ilijić fits into the wider context of the discussed topic. It is more of a reminder of the name with its roots from the Island of Hvar than it is an encouragement to revive her work dramaturgically
Dependence of the basic dynamic parameters on the disturbing force of the impact impulse type with different forms
No full textModeling of soil parameters spatial uncertainty by geostatistics
No full textGeotechnical performance of 'soil-structure' systems is strongly dependent on the properties of the soil and prediction of the performance of these systems in real conditions requires accurate modeling of soil parameters. With the help of high-speed computers, now it is possible to create advanced constitutive models, but large uncertainties and variations in soil properties could reduce the advantages gained by using such models. In this paper sources and types of uncertainty in geotechnical engineering practice are first presented, followed by a review of the basic concepts and terminology of geostatistics. Finally, procedures for quantification of uncertainty and for geostatistical estimation and simulation of spatially variable soil properties are presented.</jats:p
SELECTION OF DESIGN APPROACH FOR DESIGNING SPREAD FOUNDATONS IN OUR REGION ACCORDING TO EUROCODE 7
No full textAbstract. The existing civil engineering standards for designing are to be replaced with a set of Eurocodes. Eurocode 7 is related to a geotechnical design, but its implementation is difficult, due to different geological, geographical and climate conditions which lead to development of different local designing traditions all over Europe. In order to overcome them, Eurocode 7 offers three design approaches and sets of partial factors to be used within. After accepting it, each country has to declare on the selection of design approach according to which designing is going to be performed and to define appropriate partial factors. This paper presents methodology for selection of appropriate design approach for spread foundations in our region where the process of introduction of Eurocodes is still active. The method based on keeping up with the similar designing procedure may also be used for other geotechnical structures.Key words: Eurocode 7, geotechnical design, design approach, spread foundations
Mathematical modeling of materially nonlinear problems in structural analyses, Part I: Theoretical fundamentals
No full textMaterial models describe the way they behave when loaded. The paper presents the development of the model beginning with the simplest linear-elastic and rigid-plastic ones. The basic data in the plasticity theory have been defined, such as criterion and yield (failure) surface, hardening law, plastic yield law and normality condition. Yield criteria of Tresca, Von Mises, Mohr-Coulomb and Drucker-Prager were given separately.</jats:p
Mathematical modeling of materially nonlinear problems in structural analyses, Part II: Application in contemporary software
No full textThe paper presents application of nonlinear material models in the software package Ansys. The development of the model theory is presented in the paper of the mathematical modeling of material nonlinear problems in structural analysis (part I - theoretical foundations), and here is described incremental-iterative procedure for solving problems of nonlinear material used by this package and an example of modeling of spread footing by using Bilinear-kinematics and Drucker-Prager mode was given. A comparative analysis of the results obtained by these modeling and experimental research of the author was made. Occurrence of the load level that corresponds to plastic deformation was noted, development of deformations with increasing load, as well as the distribution of dilatation in the footing was observed. Comparison of calculated and measured values of reinforcement dilatation shows their very good agreement.</jats:p
COMPARATIVE ANALYSIS OF DESIGN METHODS OF TRANSVERSALLY LOADED DIAPHRAGMS
No full textReinforced concrete diaphragms are in-built supporting structures constructed directly in the ground. They are intended for reception of lateral soil pressures, and due to the thickness-height ratio They belong to the group of deformable structures. The paper presents different design methods of transversally loaded diaphragms as well as constitutive soil models which can be used on this occasion. For comparison of the described methods, one example of design of reinforced-concrete diaphragm with the analysis of obtained results was done. The diaphragm is firstly treated using classical analytical methods, and they using the numerical methods based on the concept of problem discretization using finite differences method and the STRESS, TOWER and PLAXIS software. The goal of the paper is as accurate prediction of the diaphragm and surrounding soil behavior as possible, as well as finding of the relevant impacts required for the design
A comparative theoretical-experimental analysis of settlements of shallow foundations on granular soil
No full textThe paper presents a brief description of experiment within the research project 'Theoretical and experimental analysis of interaction of shallow reinforced concrete foundations and soil for the purpose of improvement of national regulations and implementaation of Eurocode system' where in situ tests of a series of reinforced concrete foundation footing were performed, by loading until failure. As a rule, methods for calculation of shallow foundations settlement on granular soils overestimate the expected settlement, and underestimate soil bearing capacity, which results in a conservative foundation design. In order to test accuracy and reliability of the different settlements prediction methods, a comparative analysis of settlements calculated using these methods and those measured during experiment, was performed.</jats:p
