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Yan, R. (author), Mela, Kristo (author), El Bamby, H. (author), Veljkovic, M. (author)The newest version of prEN 1993-1-8 (2022) prescribes a material factor (Cf) to reduce the design resistance of welded joints made of high strength steel (HSS) mostly due to the lack of available experiments, given the less ductility of HSS compared to mild steel. Additionally, it is stated that the material design yield strength should not...journal article 2023
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Xin, Haohui (author), Liu, Jielin (author), Correia, Jose A.F. (author), Berto, Filippo (author), Veljkovic, M. (author), Yang, Fei (author)Strengthening fatigue damage of orthotropic steel decks (OSDs) needs to comprehensively consider the strengthening effect and the dead weight introduced during the strengthening process, especially for OSDs in super large-span bridges or old renovated bridges, where the dead weight cannot be significantly increased during repair and...journal article 2023
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Liao, D.L. (author), Cheng, L. (author), Correia, J.H.G. (author), Veljkovic, M. (author), Zhu, Shun Peng (author), Winkes, Jasper (author), Creusen, Koen (author), Berto, Filippo (author)Hole patterns are common in engineering design for connections and/or assembly purposes. Geometrical discontinuities can cause stress concentration in localized areas, making them more prone to fatigue crack initiation and influencing the fatigue life of the overall unit. In the past, much effort has been exerted on fatigue modelling of holed...journal article 2023
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Yan, R. (author), Xie, Hui (author), Yang, Fei (author), Veljkovic, M. (author), Zhao, Xiao lin (author)This paper reports an investigation on the tensile resistance of fully-penetrated butt-welded connections of (ultra-)high-strength steels considering the strength softening of the heat-affected zone (HAZ) and the strengthening due to the transverse constraint. Firstly, a parametric study is carried out to analyse the tensile behaviour of...journal article 2023
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Yan, R. (author), Mela, Kristo (author), Yang, Fei (author), El Bamby, H. (author), Veljkovic, M. (author)A welded connection consists of three main material zones, the base material (BM), the heat-affect zone (HAZ), and the weld metal (WM). The strength of HAZ depends on the BM grade and manufacturing process, electrode grade, and welding parameters. Under certain conditions, HAZ has the lowest material strength, especially for high-strength...journal article 2023
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Yan, R. (author), Xin, Haohui (author), Yang, Fei (author), El Bamby, H. (author), Veljkovic, M. (author), Mela, Kristo (author)The heat-affected zone (HAZ) is an unmelted region of a welded joint that has changed in material properties because of high temperatures during the welding process. HAZ has a lower strength than the base (parent) material (BM) and the weld metal (WM). The lower material strength is more significant if BM is made of high strength steel and...journal article 2022
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Yan, R. (author), Xin, Haohui (author), Mela, Kristo (author), El Bamby, H. (author), Veljkovic, M. (author)A welded rectangular hollow section (RHS) X-joint exposed to tension loading has three typical fracture-related failure modes: Punching shear failure (PSF), Brace failure (BF), and Chord side wall failure (CSWF). Prediction of these failure modes by finite element (FE) simulations requires modelling of the material damage. An appropriate...journal article 2022
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Pedrosa, Bruno (author), Buecking, L. (author), Veljkovic, M. (author)Injections bolts were initially conceptualized to repair riveted connections in bridges with long service lifetime and now they are widely used in steel and composite structures. Injecting steel-reinforced epoxy resin in bolted connections with oversized holes is a novel approach to enable fast and easy assembly of composite structures while...journal article 2022
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Heng, J. (author), Zheng, Kaifeng (author), Feng, Xiaoyang (author), Veljkovic, M. (author), Zhou, Zhixiang (author)This study integrates the fatigue test and numerical prediction to derive a comprehensive probability-stress-life (P-S-N) curve for rib-to-deck (RD) welded joints in orthotropic steel decks. Fatigue tests of RD joints are conducted to measure fatigue strength and crack growth data. Based on the test, a probabilistic fatigue crack growth (PFCG...journal article 2022
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Kavoura, Dr. Florentia (author), Veljkovic, M. (author)The demountable and reusable steel-concrete composite structures contribute immensely at the sustainable development in construction. The main technical practice which allows for demountability and reusability is the use of demountable shear connectors in their floor systems. These demountable shear connectors can satisfy the need for composite...conference paper 2022
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Yan, R. (author), Xin, Haohui (author), Veljkovic, M. (author)The use of high strength steel (HSS) cold-formed hollow section is of significant interest in the construction sector due to competitive costs. The accurate simulation of ductile fracture failure at the micro and macro scale is critical for improving the validity of predicting structural behaviour of HSS cold-formed hollow sections and welded...journal article 2021
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Xin, H. (author), Kisoensingh, Prishilla (author), Veljkovic, M. (author)The material reduction factor of rectangular hollow section (RHS) joints in a new version of Eurocode 3 part 1–8 is validate for steel with the nominal yield strength up to 700 MPa. In this paper, finite element simulations of gap K-joints are conducted to investigate effects of material properties, gap size of the joint, the brace to chord...journal article 2021
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Xin, H. (author), Veljkovic, M. (author)Predicting the ultimate capacity of components made of high strength steel (HSS) is a numerically challenging task. The fracture performance of HSS from different steel grades, producers, and manufacturing processes (rolling, cold forming, etc.) varies greatly. It is costly to conduct a series of experiments for each typical HSS structural...journal article 2021
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Xin, Haohui (author), Correia, José A.F.O. (author), Veljkovic, M. (author), Berto, Filippo (author)Accurately obtaining the material parameters of the damage model is very important for the ductile fracture simulation of steel structures made of high strength steel (HSS). The combination of micromechanics with the uncoupled phenomenological fracture model can be used to obtain the material parameters of ductile fracture locus only from the...journal article 2021
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van den Berg, Niels (author), Xin, H. (author), Veljkovic, M. (author)Orthotropic steel decks (OSD's) are susceptible to fatigue failure due to cyclic loading. Often fatigue cracks are found in the joint between the deck plate and the trough. Due to the welding process, residual stresses are present in and around the joint. In this paper, the effect of residual stresses on the fatigue crack propagation rate has...journal article 2021
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Xin, H. (author), Correia, José A.F.O. (author), Veljkovic, M. (author), Zhang, Youyou (author), Berto, Filippo (author), de Jesus, Abílio M.P. (author)Wire arc additive manufacturing (WAAM) has increasingly attracted attention in the construction sector because of its ability to produce large metallic structural parts in short times. In this paper, Coffin-Manson and Morrow (CMM) equation is employed to compare the fatigue life of WAAM stainless steel with the structural steels S355 and S690...journal article 2021
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Yang, F. (author), Veljkovic, M. (author), Liu, Yuqing (author)Numerical analyses incorporating appropriate damage models provide an opportunity to predict the strength and deformation capacity of steel structures. This paper presents a practical calibration for the ductile damage model of S355 and high-strength steel S690Q, S700MC, S960Q based on tensile coupon test results. A combined linear and power...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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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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