Tihomir Dokšanović

University of Osijek | UNIOS · Faculty of Civil Engineering and Architecture Osijek

The study investigates the application of waste rubber in cement-stabilized base course (CBC), aiming to address internal stresses, reflective cracks, and waste disposal issues. Mixtures of gravel and sand stabilized with varying cement and rubber content were examined, including reference mixtures and those with granulated rubber or rubber threads...

The high stiffness of cement-bound aggregate (CBA) is recognized as its main drawback. The stiffness is described by the modulus of elasticity, which is difficult to determine precisely in CBA. Incorporating rubber in these mixtures reduces their stiffness, but mathematical models of the influence of rubber on the mechanical characteristics have no...

Building with rammed earth has become increasingly popular in recent years because it is highly sustainable and has little environmental impact. More than half of the world's population lives in earthen houses, many of which are located in earthquake-prone areas such as Croatia. However, their seismic performance still needs to be researched, espec...

Tapered steel members are widely used in structural and architectural engineering for their efficiency and adaptability, allowing for optimal material usage tailored to specific load levels. However, their complex stability characteristics have hindered their representation in modern design standards like EN 1993 and AISC 360. Existing buckling sol...

Waste rubber takes many years to decompose, and thus the increasing number of tires in the world can be characterised as an important environmental issue, which generated the idea of implementing crumb rubber in structural self-compacting concrete (SCC). According to previous studies, up to 15% recycled rubber and 5% silica fume can be used to achi...

Accidental torsional behaviour induced by horizontal loading is difficult to predict, being a complex phenomenon governed by many variables. This problem gains an additional dimension of complexity when nonlinear responses with imperfections need to be considered. Therefore, evaluation and understanding the influence of accidental torsion are funda...

Digital image correlation (DIC) is a method of point displacement measurement by an optical system. If two cameras are used for capturing the same point displacement, three-dimensional data are obtained using the 3D-DIC method. The areas of application of this method in pavement construction are diverse, but it is mainly used for displacement monit...

Although structural steel for industrial use is successfully proven in the market of Southern and Southeastern Europe, examples of its use in residential construction are rare. A strong tradition of masonry and reinforced concrete construction still limits the use of materials like steel, despite examples of good practice in countries like Japan an...

Besides all the positive characteristics of cement bound courses (CBC), it has some detrimental effects on the pavement wearing courses. Due to cement hydration, this mixture is affected by shrinkage. Shrinkage induces cracks in the whole layer which along with weather conditions propagate through asphalt layers in a short period. Also, it’s stiffn...

Usually, prefabricated aluminium halls use portal frame structures with a high strength steel tension tie element. Due to the high reduction of aluminium strength induced by welding, aluminium joints of prefabricated halls are almost exclusively formed using bolts in combination with steel reinforcements. The most convenient type of reinforcement i...

Cross laminated timber (CLT) beams are mainly used within wall panels, but also standalone in design situations where cross layers have a reinforcing effect concerning stress perpendicular to the beam axis. The stress state in CLT beam members is complex and shear failure is mainly governed by stresses and strains acting in the crossing areas betwe...

Infilled frames were the focus of numerous experimental tests which have been executed to investigate the seismic behaviour of these systems, but the task remains challenging due to significantly pronounced nonlinear structural behaviour. The infill inevitably changes the “common” and well-known structural behaviour of bare steel and RC frames into...

Adequate knowledge of mechanical properties and their statistical description is the basis for performing reliable verification of design methods and design of structures in general. The probabilistic design approach implemented in Eurocodes requires statistical data on all variables used in the design procedure. Although aluminium was introduced i...

Despite numerous research studies conducted in the field of masonry-infilled steel (and concrete) frames, there is still no adequate codified design method. There is, however, a consensus that masonry-infilled frames should be treated as potentially hazardous earthquake context structural solutions. While masonry infill has positive effects on stee...

This paper aims to assess the influence of clogging on paving material (pervious concrete) drainage characteristics as well as the influence of the properties of an unbound base layer on drainage characteristics of the whole paving system. The clogging influence has been studied measuring the drainage characteristics on pervious concrete flags befo...

The interaction of a steel frame and its masonry infill under horizontal loads has both beneficial and detrimental aspects, both complex to encompass in design guidelines due to a large number of variables. There are various approaches to this problem, among which a popular research theme in steel is the omission of infill influence on the steel fr...

Pervious concrete, also known as permeable concrete is a material with the same basic components as the standard concrete, but designed to have high porosity. This basic property of pervious concrete accounts for its primary advantages and disadvantages. Low mechanical properties, but remarkable drainage properties make it a desirable green pavemen...

Every year in the world millions of tons of harvest residues are generated, such as corn stalks and corn cob blanks, wheat, soy and rice straw, sunflowers and rice husk. Those harvest residues can be used as a replacement for fossil fuels and represent a renewable energy source. Ash, which is generated by the combustion of harvest residues, is usua...

Continuing development of aluminium alloys highlights the problem of choosing adequate constitutive stress-strain equations, especially as aluminium has no pronounced yield strength and a significant degree of nonlinearity before reaching the 0.2% proof strength. Thus, the stress-strain relation cannot be simplified by ideal elastic-plastic behavio...

Agricultural biomass ash is a waste material produced by incineration of residue from fields after harvesting crops. The use of agricultural biomass in industry produces large quantities of ash that represent an ecological problem. Another ecological problem is the dependency of road building on natural materials, which has been traditionally used...

Bolted connections are important components of steel structures and they must be based on good design, with analytical descriptions of failure mechanisms that are thoroughly researched. A robust and reliable analytical description of a failure mode requires a large base of results, collected experimentally or numerically, usually via FEA. The model...

Inclusion of rubber into concrete changes its behavior and the established shape of its stress-strain curve. Existing constitutive stress-strain models for concrete are not valid in case of rubberized concrete, and currently available modified models require additional validation on a larger database of experimental results, with a wider set of inf...

Infill in frames can have detrimental or beneficial effects, and among parameters that influence interaction, infill type stands out as a common element. Masonry units utilized for masonry structures are also frequently utilized as a frame infill. Consequently, their higher strength and stiffness greatly influence the surrounding frame, which can often lea...

Tensile steel-coupon testing qualifies as one of the more commonly used experiments for determination of basic parameters for structural design. Such tests are usually performed to determine technical stress–strain relationships of tested materials. Technical stress–strain curves are not suitable for various numerical material models that exploit t...

Cyclic in-plane tests were performed on 1:2 scaled, single-story, single-bay models of weak reinforced concrete frames with masonry infill. Deformations of masonry walls were evaluated using digital image correlation, which enabled quantitative and qualitative insights into out of plane displacements. Results imply that robustness of masonry infill...

Although aluminium is a long known structural material, its use is not in accordance with the benefits achieved by its implementation. There are several reasons for such an adverse state. Those that stand out are the late development of a regulative framework for the design of structures, and still the need for improvement, lack of knowledge on app...

Effects of in-plane and out-of-plane loading are generally observed separately, but recent investigations are trying to combine the influence of in-plane damage on out-of-plane strength. In this paper, out-of-plane effects caused by in-plane loading are determined through digital image correlation. Based on conducted experimental research with vari...

Content of alloying elements, type of treatment, welding and testing parameters result in variability of mechanical properties of aluminium alloys, which needs to be taken into account in design procedures. The degree of variability and current nominal values safety level were evaluated using a collection of results from published sources, expanded...

Sustainable building is growing in importance globally including in Croatia. As green design is gaining rapid recognition in the built environment, the University of Josip Juraj Strossmayer in Osijek decided to contribute to this ongoing process: the University decided that all new building projects and renovations of existing buildings should be c...

Accurate design of pavement behaviour requires elastic properties of all the constituting layers. Measuring of elastic modulus on crude surfaces, by contact based mechanical devices, often results in a high dispersion of determined values. Therefore, application of multiple measurement methods on six different mixtures is presented, among which an...

Moguće aluminijske legure, ispitivanje svojstava tih legura, utjecaj temperature i načina obrade na njihova svojstva predmet su istraživanja još od početka 20. stoljeća i još uvijek predstavljaju istraživački izazov. Između nekoliko stotina dostupnih legura postoje razlike u duktilnosti, trajnosti (podložnosti koroziji), zavarljivosti, mogućnosti o...

Bolted connections are more than ever used because of their ease of fabrication and erection but often can be a weak link in a structure. Among single bolt lap connection types of failure, bearing mode is generally dominant because of the necessity to ensure bolthole elongation that enables a progressive collapse mechanism. Although ductility repre...

Although aluminium is a structural material that has been present on the market for a long time, its use is not in accordance with the benefits that can be achieved by its application. While it is similar to steel, there are significant differences between these materials, both in manufacturing and in physical and mechanical properties. Due to such...

Hrvatska je, kao skorašnja članica Europske Unije i potpisnica Kyotskog protokola, svoje zakonodavstvo značajno usmjerila prema smanjenju emisija stakleničkih plinova i općenito zaštiti prirodnog okoliša. Zakoni vezani uz prirodni okoliš isprepleteni su sa zakonima koji utječu na građevne proizvode, a naravno time i na materijale s malim udjelom ug...

Sprezanje je konstrukcijsko rješenje koje ima sve veći značaj zbog velikih potencijala u projektiranju djelotvornijih nosača i pojednostavljenja tehnološkog postupka izvedbe. Iako se sprezanje čelik-beton počelo koristiti prije gotovo stoljeća, neki od oblika sprezanja i dalje nisu dostatno obrađeni u suvremenim normama. Jedno od takvih rješenja je...

Materijali s malim udjelom ugljika danas su gotovo jednako prihvaćeni kao njihove konvencionalne inačice, ali njihova zastupljenost na tržištu nije značajna, unatoč očitoj dobrobiti po pitanju zaštite okoliša i time ljudskog zdravlja. U okviru održive gradnje pokušava se korisniku prikazati kako umjetno stvoreni, izgrađeni okoliš ima skrivene utjec...