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Dr. Ivan Lukačević
Assistant professor, Faculty of Civil Engineering, University of Zagreb, Croatia

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0 Composite Structures
0 Steel Structures
0 cold formed steel
0 structural stability
0 Steel structures

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Journal article
Published: 20 August 2021 in Metals
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Welded steel details are critical components from the aspect of fatigue. Additional fatigue resistance can be achieved by the High-Frequency Mechanical Impact (HFMI) treatment. This treatment increases the crack initiation period by improving the weld geometry, introducing compressive residual stresses, and increasing the weld toe’s hardness. The study presented in this paper is based on the development and calibration of an Initiation–Propagation-based Two-Stage Model (TSM), which is, by the combination of different methods, suitable to separately consider crack initiation and crack propagation. It is shown that a TSM is able to predict the fatigue life of as-welded and HFMI-treated welded steel details, which is proven by comparing the calculated results with the results of tests on similar details given in the literature. A parametric study of the TSM is conducted for different steel grades in order to investigate the influence of steel strength and HFMI parameters on fatigue lives of a welded steel detail with longitudinal attachment.

ACS Style

Boris Fuštar; Ivan Lukačević; Davor Skejić; Mladen Lukić. Two-Stage Model for Fatigue Life Assessment of High Frequency Mechanical Impact (HFMI) Treated Welded Steel Details. Metals 2021, 11, 1318 .

AMA Style

Boris Fuštar, Ivan Lukačević, Davor Skejić, Mladen Lukić. Two-Stage Model for Fatigue Life Assessment of High Frequency Mechanical Impact (HFMI) Treated Welded Steel Details. Metals. 2021; 11 (8):1318.

Chicago/Turabian Style

Boris Fuštar; Ivan Lukačević; Davor Skejić; Mladen Lukić. 2021. "Two-Stage Model for Fatigue Life Assessment of High Frequency Mechanical Impact (HFMI) Treated Welded Steel Details." Metals 11, no. 8: 1318.

Review
Published: 01 April 2018 in Advances in Civil Engineering
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Due to high stress concentrations, welded joints represent the most common locations of fatigue crack initiation in steel structures that are prone to fatigue. Welding affects material properties by the process of heating, cooling, and combining basic and additional material. Since welding is the primary process of joining elements in steel structures, it is obvious that fatigue assessment during the design and maintenance process becomes inevitable. There are many fatigue assessment methods of welded joints, but their precision remains questionable. This paper represents a review of the most common fatigue assessment methods used for welded steel joints. As a result of this review, areas that require additional research are highlighted.

ACS Style

Boris Fuštar; Ivan Lukačević; Darko Dujmović. Review of Fatigue Assessment Methods for Welded Steel Structures. Advances in Civil Engineering 2018, 2018, 1 -16.

AMA Style

Boris Fuštar, Ivan Lukačević, Darko Dujmović. Review of Fatigue Assessment Methods for Welded Steel Structures. Advances in Civil Engineering. 2018; 2018 ():1-16.

Chicago/Turabian Style

Boris Fuštar; Ivan Lukačević; Darko Dujmović. 2018. "Review of Fatigue Assessment Methods for Welded Steel Structures." Advances in Civil Engineering 2018, no. : 1-16.

Journal article
Published: 01 May 2017 in Journal of the Croatian Association of Civil Engineers
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ACS Style

Darko Dujmović; Boris Androić; Dimitrios Tonis; Ivan Lukačević. Composite columns made of concrete-filled hollow steel sections with embedded steel cores. Journal of the Croatian Association of Civil Engineers 2017, 69, 295 -306.

AMA Style

Darko Dujmović, Boris Androić, Dimitrios Tonis, Ivan Lukačević. Composite columns made of concrete-filled hollow steel sections with embedded steel cores. Journal of the Croatian Association of Civil Engineers. 2017; 69 (4):295-306.

Chicago/Turabian Style

Darko Dujmović; Boris Androić; Dimitrios Tonis; Ivan Lukačević. 2017. "Composite columns made of concrete-filled hollow steel sections with embedded steel cores." Journal of the Croatian Association of Civil Engineers 69, no. 4: 295-306.

Book
Published: 08 December 2014 in Composite Structures According to Eurocode 4
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ACS Style

Darko Dujmović; Boris Androić; Ivan Lukačević. Composite Structures According to Eurocode 4. Composite Structures According to Eurocode 4 2014, 1 .

AMA Style

Darko Dujmović, Boris Androić, Ivan Lukačević. Composite Structures According to Eurocode 4. Composite Structures According to Eurocode 4. 2014; ():1.

Chicago/Turabian Style

Darko Dujmović; Boris Androić; Ivan Lukačević. 2014. "Composite Structures According to Eurocode 4." Composite Structures According to Eurocode 4 , no. : 1.

Conference paper
Published: 01 January 2014 in IABSE Symposium, Madrid 2014: Engineering for Progress, Nature and People
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Fatigue life evaluation of existing bridges is an important task especially for bridges reaching design life or subjected to increasing traffic volume. This paper presents probabilistic fatigue life assessment of welded railway bridge based on field measurement and numerical methods which can be applied to any fatigue sensitive structure. Due to the unavailability of details for setting up measuring devices, scope of the measurements etc., it is not always possible conduct measurements for all critical details. Field measurements in some critical details in the structure can give the basis for reliability analyses and fatigue life assessment in all critical details. In this paper fatigue life is defined as time when critical detail in structure reaches target reliability level. Fatigue reliability analysis is based on S-N concept and Miner's linear damage hypothesis taking into account model uncertainties and different probability density functions of stress ranges.

ACS Style

Ivan Lukačević; Darko Dujmovic; Boris Androic. Fatigue Life Evaluation of Welded Railway Bridges Based on Field Measurements. IABSE Symposium, Madrid 2014: Engineering for Progress, Nature and People 2014, 1 .

AMA Style

Ivan Lukačević, Darko Dujmovic, Boris Androic. Fatigue Life Evaluation of Welded Railway Bridges Based on Field Measurements. IABSE Symposium, Madrid 2014: Engineering for Progress, Nature and People. 2014; ():1.

Chicago/Turabian Style

Ivan Lukačević; Darko Dujmovic; Boris Androic. 2014. "Fatigue Life Evaluation of Welded Railway Bridges Based on Field Measurements." IABSE Symposium, Madrid 2014: Engineering for Progress, Nature and People , no. : 1.

Journal article
Published: 01 January 2011 in Open Engineering
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The fatigue life assessment of orthotropic steel decks of highway bridges still hasn’t been sufficiently investigated. The inspection results of orthotropic steel decks have shown that their working life can be shorter than other members of steel highway bridges due to fatigue. This means that particular details of orthotropic decks can be critical regarding the service life of a bridge. The fatigue life of typical details of orthotropic steel decks for the real load models in Croatia and for the standardized load model of highway bridges in Eurocode has been analysed. The reliability indices have also been calculated for these details and they have been used to determine reliable fatigue life. The paper proposed the introduction of the reliable fatigue life concept which is not explicitly specified in the modern standards for structures. This concept has been offered as well as the guidelines for further probabilistic research on reliable fatigue life.

ACS Style

Ivan Lukačević; Boris Androić; Darko Dujmović. Assessment of reliable fatigue life of orthotropic steel deck. Open Engineering 2011, 1, 306 -315.

AMA Style

Ivan Lukačević, Boris Androić, Darko Dujmović. Assessment of reliable fatigue life of orthotropic steel deck. Open Engineering. 2011; 1 (3):306-315.

Chicago/Turabian Style

Ivan Lukačević; Boris Androić; Darko Dujmović. 2011. "Assessment of reliable fatigue life of orthotropic steel deck." Open Engineering 1, no. 3: 306-315.

Conference paper
Published: 01 January 2010 in IABSE Symposium, Venice 2010: Large Structures and Infrastructures for Environmentally Constrained and Urbanised Areas
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ACS Style

Ivan Lukačević; Josip Piskovic; Davor Skejic. Reliability of Exceptional Structures. IABSE Symposium, Venice 2010: Large Structures and Infrastructures for Environmentally Constrained and Urbanised Areas 2010, 1 .

AMA Style

Ivan Lukačević, Josip Piskovic, Davor Skejic. Reliability of Exceptional Structures. IABSE Symposium, Venice 2010: Large Structures and Infrastructures for Environmentally Constrained and Urbanised Areas. 2010; ():1.

Chicago/Turabian Style

Ivan Lukačević; Josip Piskovic; Davor Skejic. 2010. "Reliability of Exceptional Structures." IABSE Symposium, Venice 2010: Large Structures and Infrastructures for Environmentally Constrained and Urbanised Areas , no. : 1.