The paper analyses the post-fire axial capacity of recycled aggregate concrete-filled steel tube (RACFST) columns. Since existing design codes lack guidelines for calculating this capacity, the modified method from the second-generation of Eurocode 4 is applied and its applicability is confirmed for RACFST columns. For method evaluation, the result...

By Svetlana Kostić, Milan Bursać, Jelena Nikolić, Nikola Tošić

Eurocode requires the consideration of geometric imperfections. Imperfections can be considered directly, as is the case in GNIA and GMNIA analyses. Recent studies propose various methods for obtaining the governing imperfection, yet they rarely justify the criterion used to determine the buckling resistance from the nonlinear load-displacement cur...

By Tanja Perčić, Đorđe Jovanović, Drago Žarković, Dragan Manojlović

Broadway Subway Project u Vankuveru obuhvata izgradnju 5.7 km produženja metro linije sa više podzemnih stanica ispod jedne od najopterećenijih urbanih saobraćajnica. Duboki iskopi do približno 24 m, ograničen prostor, intenzivan saobraćaj i brojna komunalna infrastruktura predstavljali su ključne inženjerske izazove. Razvijen je modularni s...

By Dragan Majkić

Water ingress is a major cause of deterioration in underground tunnel structures, particularly in ageing railway systems. This study presents the proposed solution for the rehabilitation of the Belgrade underground railway tunnel system, emphasizing both waterproofing and structural improvement. The analysis is based on real geological, geotechnica...

By Ivana Bulajić, Aleksandar Savić

Cross laminated timber (CLT) is relatively new and eco-friendly prefabricated wood product in a form of large structural panels used mostly for floors and walls. Cross-wise layer configuration enables both in- and out-of-plane resistance of CLT panels, providing significant structural flexibility. Modern structural demands, such as long-spans and h...

By Nađa Simović, Ivan Glišović, Marija Todorović

A first in France: waterproofing of a rehabilitated highway Viaduct using Ultra-High Performance Fiber-Reinforced Concrete (UHPFRC). The rehabilitation of the Viaduct above Saône canal, on the A36 highway in France, provided an opportunity to implement an innovative waterproofing solution for a road bridge, based on the use of UHPFRC. The bri...

By Alain Huynh-Tuong, Jean-Roch Lucas, Miodrag Stanković

Although concrete is classified as a non-combustible material and generally exhibits good fire resistance, exposure to elevated temperatures may significantly reduce the mechanical properties of concrete and reinforcing steel, resulting in cracking, spalling, reinforcement degradation, excessive deformations, and, in severe cases, structural collap...

By Meri Cvetkovska, Milica Jovanoska Mitrevska

The majority of small and medium-span bridges in Germany are made of prestressed concrete. All bridges are inspected at regular intervals to identify damage or load-bearing deficiencies at an early stage. Nevertheless, on September 11, 2024, the prestressed Carola Bridge in Dresden partially collapsed without prior warning. This article first provi...

By Gregor Schacht, Max Fiedler, Robert Ritter, Silke Scheerer, Steffen Marx

This paper investigates the effect of a haunch on the ultimate capacity and lateral stiffness of a single-bay, two-hinged, unbraced steel frame subjected to gravity loading and a concentrated lateral force. For the frame without haunches, analytical and numerical analyses were carried out using beam and shell finite elements, whereas the identical ...

By Sofia Žugić, Milivoje Rogač

Before any strengthening, repair, reconstruction or adaptation of an existing structure can begin, engineers face one of the most demanding tasks in practice: establishing its true condition. Structural assessment is far more than a routine inspection - it is an investigative process combining field observation, testing, material science, structura...

By Vlastimir Radonjanin, Mirjana Malešev