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Xin, H. (author), Nijgh, M.P. (author), Veljkovic, M. (author)Injection bolts are bolts in which the cavity produced by the clearance between the bolt and the wall of the hole is completely filled up with a two-component resin. Filling of the clearance is carried out through a small hole in the head of the bolt. After injection and complete curing, the connection is slip resistant. Recently the...book chapter 2020
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Nijgh, M.P. (author), Veljkovic, M. (author)The design of sustainable structures is increasingly gaining attention in the construction sector as a societal and technological challenge. Demountability and reuse of structures contributes to the reduction of the environmental impact of the built environment. Welded headed studs used in traditional steel-concrete composite floor systems need...journal article 2020
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Xin, H. (author), Veljkovic, M. (author)In this paper, the parameters of fatigue crack growth rate for Q355J2 steel exposed to air and seawater were presented using the “Paris' law” based on the stress intensity factor (SIF), J-integral, crack tip opening displacement (CTOD) and crack tip opening angle (CTOA). The residual stress of a compact tension specimen is analysed by...journal article 2020
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Nijgh, M.P. (author), Veljkovic, M. (author)Demountable and reusable composite floor systems enable the decoupling between the use of construction materials and economic activity, and hereby contribute to the sustainability of the built environment. Efficient material use through optimised cross-section design reduces construction material demand. Demountable steel-concrete composite...journal article 2020
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Liu, X. (author), Wang, Yuanqing (author), Ban, Huiyong (author), Liu, Ming (author), Veljkovic, M. (author), Bijlaard, F.S.K. (author)Application of longitudinally profiled (LP) steel plate in the flange of flexural members may provide a good solution to optimize their mechanical performance and to improve the efficiency of steel use, whilst existing design codes provide no design guidance or prediction methodology for such advanced beams in terms of flexural behaviour. To...journal article 2020
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Laghi, V. (author), Palermo, Michele (author), Gasparini, Giada (author), Veljkovic, M. (author), Trombetti, Tomaso (author)Early investigations suggest that the use of Additive Manufacturing (AM) technologies for construction has the potential to decrease labor costs, reduce material waste, and create customized complex geometries that are difficult to be manufactured using conventional construction techniques. Nevertheless, the full exploitation of AM...journal article 2020
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Pedrosa, Bruno (author), Correia, José A.F.O. (author), Rebelo, Carlos A.S. (author), Veljkovic, M. (author)In North America and Europe, there is a significant number of centenary metallic bridges that require maintenance and strengthening operations. These structures need to be adapted to increasing traffic intensities, and their structural integrity should be constantly evaluated. Fatigue damages were not considered in the original design of old...journal article 2020
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Gîrbacea, Andrei (author), Nijgh, M.P. (author), Veljkovic, M. (author)Composite beams are commonly used in current design practice due to their efficient material use and competitive execution. The shear connection is mainly achieved by means of headed studs welded on the top flange. However, the welded connectors obstruct the possibility of a non‐destructive disassembly required to reuse the steel beams and...conference paper 2019
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Nijgh, M.P. (author), Gîrbacea, Andrei (author), Veljkovic, M. (author)Steel-concrete composite beams are widely used in practice because of their simple construction sequence and economic cross-section design. Reuse of traditional composite beams is not possible due to the permanent connection between the steel beam and concrete deck established by welded headed studs. To allow for fast construction,...journal article 2019
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Xin, H. (author), Nijgh, M.P. (author), Veljkovic, M. (author)In this paper, compressive material tests on unconfined/confined resin and steel reinforced resin were experimentally evaluated in order to validate the numerical results. The uniaxial model which combines damage mechanics and Ramberg-Osgood relationship is proposed in this paper to describe the uniaxial compressive behaviour of resin and...journal article 2019
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Pedrosa, Bruno (author), Correia, José A.F.O. (author), Rebelo, Carlos (author), Lesiuk, Grzegorz (author), De Jesus, Abílio M.P. (author), Fernandes, António A. (author), Duda, M. (author), Calçada, Rui (author), Veljkovic, M. (author)The maintenance and safety of ancient bridges is a major concern of governmental authorities. In particular, the safety of old riveted bridges fabricated and placed into service at the end of the 19th century deserves particular attention. These structures are susceptible to exhibit high fatigue damage levels due to their long operational...journal article 2019
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Stranghöner, Natalie (author), Afzali, Nariman (author), Jungbluth, Dominik (author), Veljkovic, M. (author), Bijlaard, F.S.K. (author), Gresnigt, A.M. (author), de Vries, P.A. (author), Kolstein, M.H. (author), Nijgh, M.P. (author)SIROCO investigated the slip-resistant behaviour of carbon and stainless steel preloaded connections as well as the preloading behaviour of stainless steel bolting assemblies in principle. The slip factor test procedure according to Annex G of EN 1090-2 was investigated regarding the influence of the test speed, preload level, tightening method,...report 2019
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Nijgh, M.P. (author), Veljkovic, M. (author)Duurzaamheid wordt steeds belangrijker in de bouwsector. Demontabel en herbruikbaar bouwen vermindert het gebruik en verbruik van natuurlijke grondstoffen en minimaliseert afval en uitstoot van schadelijke stoffen. Binnen de sectie Steel and Composite Structures van de TU Delft is ontwikkeling van technische oplossingen voor duurzame staal-beton...journal article 2019
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Gîrbacea, Andrei (author), Nijgh, M.P. (author), Veljkovic, M. (author)Environmental concerns steerthe construction industry towards more sustainable developmentssuch asdemountable and reusablestructures. Composite structures are a frequent solution for multi-story buildings and bridges, however the use of welded shear connectors requires labour and energy intensive disassembly. Two bays of a demountable flooring...conference paper 2019
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Gritsenko, Alina (author), Nijgh, M.P. (author), Veljkovic, M. (author)Composite slab consisting of in‐situ casted reinforced concrete on profiled sheeting, which is connected to steel beams by shear connectors, is a common structural flooring system in office buildings and car parks. The headed welded studs are inexpensive and rather easy to use in‐situ because they can be welded to the steel beam through the...conference paper 2019
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Tran, Anh Tuan (author), Bernspång, Lars (author), Veljkovic, M. (author), Rebelo, Carlos (author), da Silva, Luís Simões (author)This paper describes a study of the S650 high strength steel material properties including the effect of cold-formed angle. Coupon specimens with different cold-formed angles (90°, 100°, 120°, 140°, 160°and 180°) and different thicknesses (4 mm and 6 mm) were examined. Relationships between cold-formed angle and yield stress as well as...journal article 2019
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Xin, H. (author), Mosallam, Ayman (author), Liu, Yuqing (author), Veljkovic, M. (author), He, Jun (author)In this paper, analytical and numerical homogenization methods are proposed to effectively simulate the macroscopic characteristics of a pultruded composite lamina. A continuum damage model was implemented via user material subroutine to model fiber failure, while the Mohr-Coulomb plastic criterion is employed to model matrix damage. In order...journal article 2019
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Xin, H. (author), Veljkovic, M. (author)The assessment of fatigue crack initiation behavior of steel structures is essential and important especially to improve the application of high strength steel in construction. For a complete understanding of fatigue endurance, it is necessary to combine the phenomenological damage model with finite element numerical approach. In this paper,...journal article 2019
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Nijgh, M.P. (author), Veljkovic, M. (author)Composite floor systems are frequently used for high-rise buildings and multi-storey car park buildings, mainly because of the competitive combination of the steel beam and the concrete deck. Traditionally, composite beams are cast in-situ and shear interaction between the concrete and steel beam is provided by welded headed studs. The...journal article 2019
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Nijgh, M.P. (author), Xin, H. (author), Veljkovic, M. (author)This paper illustrates the most recent developments in the field of injected bolted connections. A novel injection material, steel-reinforced resin, is used to enhance stiffness of resin-injected bolted shear connections. The main goal is to achieve the slip resistance connection in a clearance holes without pre-tensioning of bolts. Steel...conference paper 2019