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Sanacija klizišta na lokaciji Višnjička 74 u Beogradu
No full textU radu je prikazan geotehnički problem koji je nastao tokom iskopa temeljne jame stambeno-poslovnog objekta sa dve podzemne etaže. Na predmetnoj lokaciji izvedena je ukopana potporna konstrukcija od šipova za potrebe zaštite iskopa temeljne jame. Tokom juna 2023. vršeni su obimni zemljani radovi usled kojih je došlo do pojave velikih pomeranja i (re)aktivacije fosilnog klizišta. Kao hitna mera sanacije, u prvoj polovini jula 2023. izvršeno je intenzivno zasipanje temeljne jame zemljanim materijalom, kako bi se sprečila dalja pomeranja. Takođe, sprovedeni su dodatni istražni radovi kako bi se stekao bolji uvid u kompleksne geotehničke uslove izgradnje na lokaciji i dat je sažet prikaz geoloških karakteristika terena. U cilju definisanja pouzdanog i efikasnog tehničkog rešenja formirani su računski profili terena i izvršena je numerička analiza stabilnosti sa povratnom analizom, nakon čega su predložene adekvatne mere sanacije
Increasing the Local Road Network Resilience from Natural Hazards in Municipalities in Serbia
No full textThis work is exampling a strategy for increasing climate resilience on local roads infrastructure in the Republic of Serbia, under the World Bank project framework. Methodological approach is briefly described as well as related mobile and web applications, labelled MaPLoRDs, which offers sustainable solution for resolving common issues encountered in road management at local, municipality level. It utilizes field and spatial data modelling as separate procedures which can be coupled or produce outputs independently, with minimal interaction with the operating staff. Collected data are translated into scores of exposure to main types of hazard (landslides, rockfalls, floods and flash floods) followed by vulnerability and criticality scores allocated per each road link. Final risk calculation allows ranking of highly impacted links that can be prioritized during subsequent road investment planning, enabling more rational budgeting. The concept is tested on two neighbouring pilot areas, the City of Kraljevo and the Aleksandrovac Municipality in Serbia, which are very different
in terms of capacity, equipment and experience in dealing with natural hazards. Initial investment simulations for both pilots imply that MaPLoRds is a powerful tool for undertaking the first steps toward climate resilient roads
Serviceability assessment of floors due to footfall-induced vibrations: Keynote lecture
No full textWhen people walk on floors, they generate dynamic forces that cause the structure to vibrate. The vibration displacement amplitude is normally very small (micrometres rather than millimetres) and is not perceived significant in terms of structural integrity. However, it can often be felt by people and, if excessive, can be distracting and detrimental to the perceived quality of the structure. Vibration can also impair the function of sensitive equipment in laboratories, operating theatres and precision manufacturing facilities. In contemporary architecture, vibration serviceability is the leading design criterion for long-span floors governing their size and shape. This paper provides an overview of the state-of-the-art design for vibration serviceability assessment of floors induced by people walking as well as cutting-edge solutions to excessive vibration levels
Short Cyclic Algorithm for Turbo Block Construction
No full textThis paper presents perhaps the shortest possible algorithm for drafting a turbo block in a
standard CAD environment. Though not defining the complete turbo roundabout geometry (the legs are defined by their centerlines only), turbo block construction stays at the very core of its geometrical definition. Relevant national policies elaborate turbo block construction at various levels of detail. Some policies skip certain definitions of spirals’ centers and some even allow for slight discontinuities in spiraling lanes’ geometries. But, as our computer program had to be based on precisely defined geometrical features, no question, be it a location of a particular center or relation between the interconnecting arcs, could be left unanswered. Consequently, while explaining the basics on which
the program relies, all the elements of the turbo block are discussed. Even the problems not addressed in renowned national policies (such as alternatively matching marking and curb lines) had to be resolved before being incorporated into the program. After resolving and elaborating turbo block roundabout technics in detail, a new cyclic algorithm for turbo block construction is presented. The program is very short and could be easily understood and modified by the average programmer
Moguće posledice primene nove direktive o gradskim otpadnim vodama EU u Srbiji
No full textDirektiva o tretmanu gradskih otpadnih voda EU usvojena je 1991. godine i njenom
primenom u protekle tri decenije došlo je do značajnog smanjenja ispuštanja zagađenja u
vode na teritoriji EU. Nakon višegodišnjeg procesa evaluacije i konsultacija, Evropska
komisija je oktobra 2022. godine usvojila predlog nove Direktive o gradskim otpadnim
vodama koja uvodi značajne novine u ovoj oblasti. U radu su detaljno prikazani najbitniji
elementi nove Direktive i data je preliminarna procena uticaja zahteva iz predloga nove
Direktive na budući razvoj ovog sektora u Srbiji.The EU Urban Wastewater Treatment Directive was adopted in 1991 and its
implementation over the past three decades has resulted in a significant reduction in pollution
discharges in the EU. After a multi-year process of evaluation and consultation, in October
2022, the European Commission adopted a proposal for a new Directive on urban wa-
stewater, which introduces significant innovations in this area. The paper presents the most
important elements of the new Directive in detail and provides a preliminary assessment of
the impact of the requirements from the proposal of the new Directive on the future
development of this sector in Serbi
Driving the Built Environment Twin Transition: Synergising Circular Economy and Digital Tools
No full textThis chapter offers a comprehensive analysis of the intersection between digitalisation and the circular economy (CE) within the construction sector. It underscores the transformative potential of integrating digital tools to advance circularity objectives across managerial, environmental, economic, and social dimensions. The chapter discusses fourteen digital tools and technologies, which play a pivotal role in CE by streamlining data integration and visualisation, enhancing the accuracy of Life Cycle Costing (LCC) and Life Cycle Analysis (LCA) assessments, and supporting the adoption of CE strategies. Moreover, it explores how digital tools can facilitate collaboration among stakeholders, fostering knowledge sharing and effective communication throughout the project lifecycle. Nevertheless, challenges such as the absence of standardised methods, data interoperability issues, and the need for well-defined system boundaries remain. The chapter highlights the critical role of digitalisation in advancing the transition towards CE in the construction sector, emphasising the necessity of overcoming technical and systemic obstacles to fully harness the potential of digital tools in implementing CE. This transition aligns with the broader ambitions of the European Green Deal and the EU Digital Strategy, aiming to create a more sustainable, efficient, and resilient construction industry. By addressing these challenges and leveraging digitalisation, the construction sector can make a significant contribution to a sustainable and circular economy, ultimately benefiting both the environment and society
Experimental investigation on the seismic performance of reinforced concrete frames with decoupled masonry infills: considering in‑plane and out‑of‑plane load interaction effects
No full textMasonry infills are frequently employed as both outer and inner partitions in reinforced concrete (RC) frame structures due to their outstanding characteristics in terms of energy efficiency, fire resistance and sound isolation. However, common construction practice typically involves the mortar connection between masonry infills and RC frames. For this reason, the unforeseen frame-infill interaction takes part under seismic loading, which leads to severe and uncontrollable damage to masonry infills. This interaction also causes damage or even the collapse of the RC frames and thus of the whole structures. The poor performance of infilled RC frame structures in recent earthquake events is a strong motivation for the development of innovative engineering solutions, which aim to mitigate the detrimental effects of frame-infill interaction. This article introduces an innovative decoupling system founded on the concept of decoupling the RC frame from the masonry infill. The decoupling is achieved by inserting elastomeric material between the masonry infill and RC frame. The properly designed decoupling system allows infill activation only at high in-plane drifts. Simultaneously, it provides boundary conditions for seismic loads acting perpendicular to the infill plane. Firstly, the article explains the design of the masonry infill with the decoupling system and its installation. Afterwards, the results of small specimen tests carried out to determine the load-bearing capacity of the decoupling system are presented. Furthermore, the article discusses the findings of an extensive experimental campaign conducted on nine real-size RC frames with decoupled infills subjected to separate and combined in-plane and out-of-plane loadings. In addition to different loading types, various infill configurations are considered – solid infill, infill with centric window, and infill with centric door opening. Finally, the experimental results of RC frames with decoupled infills are compared with the experimental results of traditionally infilled RC frames, which were tested within the framework of the same project. The thorough evaluation and comparison of the experimental findings demonstrate the significant improvement of seismic performance of infilled RC frames if the decoupling system is applied
An Improved DeNSE Methodology for Optimal Sectorization of Water Distribution Networks
No full textSectorization of water distribution networks (WDN) into district meter areas (DMAs) is considered a key strategy for an efficient management of WDN. Typically, it involves a two-stage procedure – clustering stage in which the division of the WDN into clusters is done and dividing stage which involves placement of valves and flow meters on cluster’s boundary pipes to define the DMAs. While recently published methods attempt to enhance both the clustering and dividing stages, they fail to provide decision-making flexibility. They also neglect to consider the presence of existing valves in the WDN, which can significantly affect the evaluated implementation cost, often the primary decision-driving factor. This paper presents improvements to the previously introduced DeNSE method for sectorization of WDN, aiming to address these deficiencies. The methodology consists of a clustering stage, based on network uniformity index, and a dividing stage in which originally used heuristic procedure is replaced with Genetic Algorithm (GA) optimization minimizing implementation cost. Consideration of existing valves in WDN and criteria for water supply security are also implemented in the dividing stage to offer better estimate of imple-mentation cost and post-sectorized operational efficiency of the WDN. Finally, GIS visualization is implemented and hydraulic model of sectorized WDN (EPANET file) is generated, providing practitioners with valuable insights and decision-making flexibility. The methodology is tested on a part of Amsterdam WDN in the Netherlands, serving as a pilot for methodology evaluation. A range of feasible sectorization solutions is generated and compared based on implementation cost and three performance indicators (PIs). The paper provides an in-depth discussion on the selection of preferable sectorization solution. Reported results demonstrate the method’s efficiency in op-timizing sectorization solutions with minimum implementation cost whilst preserving the WDN operational efficiency and meeting the local design criteria
Евалуација подужне равности коловоза применом облака тачака добијених мобилним лидар системом
No full textУслед интезивиране градње путних објеката као и растућег саобраћајног оптерећења на путним правцима у експлоатацији долази до све веће потребе за модернизованим методама мерења равности коловоза за потребе система за управљање одржавањем путева – PMS (Pavement Management System), олакшаног увида у стање постојећих саобраћајница као и за мониторинг равности током извођења радова. Као један од најзначајнијих показатеља стања коловозне конструкције намеће се индекс подужне равности коловоза – IRI, светски признат стандард који је увела светска банка 1986. Снимање подужне равности на нивоу путне мреже захтева скупу опрему лимитираних могућности, док локализовано, односно ручно снимање захтева изузетне напоре у погледу времена и радне снаге и проблематично је са аспекта безбедности. Мобилно лидар скенирање – MLS је модерна, временски ефикасна технологија која омогућава масовно прикупљање просторних података изузетне прецизности. У модерној инжењерској пракси, све чешће су присутни облаци тачака добијени даљинском детекцијом, фотограметријом или мобилним лидар скенирањем. Овакви облаци тачака могу се користити у различите сврхе, међутим њихова примена у евалуацији стања коловоза је и даље недовољно истражена. У оквиру овог рада дат је преглед примена наведене технологије и извршена је анализа подужне равности карактеристичне деонице градске саобраћајнице у Београду
Learning Through Playing with AI: Collaboration of Intelligences in Creating a Transformable 3D Art Installation
No full textThis study explores how integrating AI image generators into art installations fosters innovative, educational outcomes, demonstrated in the RELATE project. Aimed at creating transformable 3D structures that invigorate urban spaces for learning, the project engaged students in a workshop to design a physically adjustable structure shaped by human and AI collaboration.
AI, here not just as a tool but also as a creative partner and competitor, plays a vital role in pushing students’ creativity, challenging them to balance imaginative designs with practical constraints. The process begins with verbal descriptions fed into the AI, generating initial images that are iteratively refined. Students experiment with AI's limitless creativity, addressing technical limitations to make ideas physically feasible. By constructing the final structure in teams, students gain hands-on experience in design, feasibility, and teamwork. This project underscores AI's potential as an inspirational force in creative processes, enhancing human ingenuity