Roko Žarnić

Multicriterial sustainability assessment of residential buildings

Abstract A simple method for the assessment of sustainability of a residential building is proposed. The method consists of two steps. First, areas that influence sustainability level of the building (e.g. building architecture, design, in‐built materials) are identified. For each area, several elements and corresponding indicators are determined. Depending on their nature, the indicators are expressed either in quantitative or qualitative terms. The impact areas and their corresponding elements influence all three aspects of sustainability. In the second step, the indicators are aggregated according to their influence on individual sustainability aspects. Special attention is placed to the determination of weights assigned to the indicators in order to make the assessment method relevant in the local context. Initially, the consensus‐based method within the research team was used as a technique for aggregated indicators’ weighting. Later, the open discourses among the developers and stakeholders, as well...

Renovation priority ranking by multi-criteria assessment of architectural heritage: the case of castles

Preservation of cultural heritage is related with high costs and required interventions generally exceed available funding. It is, therefore, necessary to prioritise renovation interventions. Multi-criteria assessment can lead to scientifically sound and informed decisions about interventions. The paper presents the results of research carried out with the purpose of establishing a multi-criteria method for the assessment of architectural heritage, specifically for castles in Slovenia. It explains the methodology used to develop the multi-criteria method. Its main elements are critical content analysis of relevant literature, comparative analysis between the Slovenian and international space, and identification of relevant criteria and sub-criteria of the decision method. The course and results of empirical research, based on interviews with selected experts, is presented together with the results of the criteria importance ranking based on the Analytic Hierarchy Process (AHP) method. The research presented in this paper is interdisciplinary and brings together tangible and intangible aspects of cultural heritage. The obtained results confirm that rational determination of relative importance of individual criteria for the assessment of architectural heritage can help decision-makers to identify buildings with higher refurbishment priority.

Analysis of hysteretic response of glass infilled wooden frames

The idea of the present study is to determine the performance of timber-glass hybrid shear wall exposed to monotone and cyclic horizontal in-plane load at the level of story height which is simulation of situation during earthquake or wind load. Fourteen quasi-static in-plane racking tests of shear wall specimens have been conducted where the specimens are composed of laminated timber frame and heat strengthened laminated glass panels, which are adhesive less, connected to wooden frame with friction only. For the evaluation of the experimental results the software (HYSPA+) was developed which is giving the information on normalised stiffness degradation and equivalent viscous damping coefficient based on the in-plane hysteresis response. The results are showing that described structural components are ductile with relatively high potential for dissipating of induced energy due to friction connection of glass panel and wooden frame. Observed damages were concentrated in timber frame joints, while glass panels remained entirely undamaged. In continuation of development of glass infilled wooden frames the configuration of frame joints will be modified to achieve its higher load bearing capacity and lower deformability.

Seismic resistance of stone masonry building and effect of grouting

Injektiranje je jedan od najdjelotvornijih, a cesto i najprikladnijih postupaka za pojacanje zidova starih zidanih građevina. Da bi se ocijenio utjecaj raznih vrsta injekcijskih smjesa na mehanicka svojstva zidanih građevina, obavljeno je ispitivanje in situ postojece zidane građevine. Dobiveni rezultati koristeni su za ocjenu seizmicke otpornosti građevine pomocu metode postupnog guranja, uz primjenu pristupa katnog mehanizma i mehanizma globalnog odziva. Prihvatljivije vrste injekcijskih smjesa usporedive su s cementnim injekcijskim smjesama. Dobiveno je da se pristupom globalnog odziva postižu realniji rezultati cak i kod niskih zidanih građevina

Identity card of cultural heritage: how to collect and organize data

The paper presents the basic idea and content of unified approach to collecting and organizing data on cultural heritage assets in order to use them in processes of decision-making related to its preservation. This presented outline of the content and philosophy behind the European Cultural Heritage Identity Card gives some information on the proposed methodology for the collection, presentation and application of data required for the informed understanding of particular heritage buildings or assets. Combined, on the one hand the EU-CHIC structure may be used as a powerful mechanism for generating relevant data as a processing tool for the permanent maintenance and economical exploitation of heritage, and of its retention, protection and preservation on the other.

Lime Based Grouts for Strengthening of Historical Masonry Buildings in Slovenia

Most of the historical masonry buildings in Slovenia were built out of local stone or stone and brick with lime-based mortars. An efficient technique for improving the mechanical properties of stone or stone-brick walls is grout injection. In order to evaluate the quality and compatibility of commercially available injection grouts with materials present in historical masonry buildings, several types of hydraulic lime-pozzolana, lime-cement and cement grouts were tested. Chemical, physical and mechanical criteria to select optimal grout mixture for strengthening of historical masonry buildings were proposed, by which tested grouts were classified in three quality classes A, B and C. Only two commercial lime-cement grouts and one cement grout were able to meet the set requirements and were qualified in class B as medium quality grout (one lime-cement grout) or in class C as low quality grouts. Therefore, the design of hydrated lime-based grouts was carried out in continuation of our study, in order to obtain a grout that is highly compatible with the historical masonry in Slovenia. Among available limes, hydrated lime in powdered state and lime putty were used. Ground granulated blast furnace slag (GGBS), volcanic tuff, and limestone powder were used as mineral additives. It was found that the added combination of limestone powder and supplementary cementitious material (GGBS or tuff) has a beneficial influence on the properties of designed grout compositions.

Kompozitni sustavi drvo - nosivo staklo u potresnom okruženju

Nosivo staklo u kombinaciji s drvenim okvirom predstavlja kompozitni sustav koji ima predispozicije za dobro ponasanje prilikom potresa, istovremeno je energetski efikasno i isplativo, estetski prihvatljivo te ima dobre nosive karakteristike. U novije vrijeme provedeno je nekoliko istraživanja kompozitnih sustava drvo – nosivo staklo te se prema rezultatima tih ispitivanja mogu odrediti osnovne smjernice daljnjih istraživanja.

Cultural Heritage Information Systems State of the Art and Perspectives

Europe is diverse and complex – and its built cultural heritage reflects this. Millions of buildings, archaeological sites and city centres exist from Podsreda Castle in Slovenia to the historic core of Bilbao, Spain. This is one of Europe’s many strengths; however this diversity and complexity make the management of information concerning these resources a difficult task. In order to better manage Europe’s Cultural Heritage it is necessary to understand the current state of information systems and how they are used. To meet these aims four streams were researched in the framework of the European project EU-CHIC. This research offered a better understanding of how current systems are used, who uses them, how they function and what are the future research needs of the field. This in turn allows for better final recommendations for improvement in the management of Cultural Heritage. The four streams are: Government officials and decision makers, Professional end-users of information systems, Existing research and Future research priorities of information systems development and implementation. This paper describes the methodology of obtaining information from each stream, the final results and possible perspectives of further implementation, development and research into data management information systems and thus into integrated management approach to cultural heritage preservation.

A contribution to a unified approach in policy making through documenting cultural heritage

The paper presents the results of an interdisciplinary research project, bridging technical sciences and the humanities, with the purpose of conducting research, exploring arguments and options for the potential of a unified data management system in the European area. Recognizing the ambitiousness of such a project, the primarily intention is to provide well founded arguments to explore the implementation of a unified pan-European approach to cultural heritage data management; including the collection, presentation and storage of tangible and intangible material data on each location under observation.

Timber-structural glass composite systems in earthquake environment

Nosivo staklo u kombinaciji s drvenim okvirom predstavlja kompozitni sustav koji ima predispozicije za dobro ponasanje prilikom potresa, istovremeno je energetski efikasno i isplativo, estetski prihvatljivo te ima dobre nosive karakteristike. U novije vrijeme provedeno je nekoliko istraživanja kompozitnih sustava drvo – nosivo staklo te se prema rezultatima tih ispitivanja mogu odrediti osnovne smjernice daljnjih istraživanja.