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References 1. Furtak K., Mosty zespolone , PWN, Warszawa 1999 2. Hou W., Ye M., Design methods of headed studs for composite decks of through steel bridges in high-speed railway , J. Cent. South Univ. Technol., 18 (2011) 946-952 3. Karlikowski J., Madaj A., Wołowicki W., Mostowe konstrukcje zespolone stalowo-betonowe , WKŁ, Warszawa 2007. 4. Siekierski W., Analiza numeryczna sił rozwarstwiających w pomoście zespolonym przśsła kratowego , Inżynieria i Budownictwo, 12 (2011) 674-676. 5. Siekierski W., Kolejowe przśsła kratownicowe z pasem sztywnym , Inżynieria

Symposium on Impact Engineering; Prof. Yukio Ueda Honoring Symposium on Idealized Nonlinear Mechanics for Welding and Strength of Structures. 14. Ozguc O., Das P. K., Barltrop N. (2007): The new simple design equations for the ultimate compressive strength of imperfect stiffened plates . Ocean Engineering, 34(7), 970–986. 15. Ozguc O. (2018): Estimation of buckling response of the deck panel in axial compression . Polish Maritime Research, 25, No. 100, 98‒105. 16. Paik J., Kim B., Seo J. (2008a): Methods for ultimate limit state assessment of ships and ship

REFERENCES 1. Arvidson M, Axelsson J, Simonson M, Tuovinen H. 2006. Fire safety approach on the DESSO ROPAX . SP Rapport 2006:01. 2. Arvidson M. 1997. Large scale Ro-Ro vehicle deck fire test. Nordtest project 1299-96. Brandforsk project 421-941 . SP Swedish National Testing and Research Institute. Fire Technology. SP Report; 1997:15. 3. Arvidson M. 2009. Large-scale ro-ro deck fire suppression tests. SP-Report. 2009:29. 4. Arvidson M. 2014. Large-scale water spray and water mist fire suppression system tests for the protection of Ro–Ro cargo decks on ships

rebuilding . STN 73 0038. Bratislava. [9] Vičan, J. et al. (2002). Methodology of calculation of load-carrying capacity of railway bridges. Guideline for Slovak Railways. ŽU Žilina. [10] Kvočák, V., Kožlejová, V. (2009). Filler beam deck bridges with encased beams of alternative sections. Selected Scientific Papers, Journal of Civil Engineering, Vol. 4, Issue 2, pp 7-15. [11] Bujňák, J., Odrobiňák, J. (2006). Experimental and theoretical research on real behaviour of composite bridge structures. In Proceedings from International conference on Bridge engineering

Abstract

Deck bridges with encased filler-beams have been used in construction for a long time. Nowadays they are employed mainly in the refurbishment of railways and in road construction. Regarding the method of construction, they can be divided into monolithic/cast-in-place (constructed fully in its final location) or prefabricated/precast structures (built at another location and then transported to their final location for placement in the full structure). Both methods of construction have certain advantages and disadvantages. Decision-making and selecting a better alternative depends on the building conditions and a means of transport (whether a road or railway) running on the bridge.

Abstract

In this work, buckling strength assessment of a deck of a double hull oil tanker is carried out using the non-linear finite element code ADVANCE ABAQUS. The comparisons are performed with the Det Norske Veritas (DNV-GL) PULS (Panel Ultimate Limit State) buckling code for the stiffened panels, DNV-GL Classification Notes (CN) No.30.1 and the DNV-GL Ship Rules. The case studied corresponds to axial compression. Two levels of imperfection tolerances are analyzed, in accordance with the specifications in the DNV-GL Instruction to Surveyors (IS) and the DNV-GL Classification Notes No. 30.1. Both “as built” and DNV-GL Rule “net” dimensions are analyzed. The strength values from ADVANCE ABAQUS and PULS are very close. DNV-GL CN 30.1 is in conservative side, but the strength differences between the “as built” and “net” dimension cases are consistent with the finite element analysis results. This paper gives a brief description of the background for the stiffened panel models used in PULS, and comparison against non-linear FE analysis, and DNV-GL Classification Society Rules. The finite element code ADVANCE ABAQUS is employed in a non-linear buckling analysis of a stiffened deck panel on a double skin tanker that is subjected to a Condition Assessment Program (CAP) hull survey. The aim of the analyses has been to validate and compare the buckling capacity estimates obtained from PULS, DNV-GL Classification Notes No.30.1 (CN 30.1) and the DNV-GL Ship Rules.

REFERENCES Paszota Z. (2000). Energy efficiency of hydraulic cylinders in servo-mechanism. Conference proceedings. Naval Arch. Marine Eng. 2000, pp. 139-147. Paszota Z. (2003). Energy aspects of hydrostatic drives. Polish Maritime Research, Vol. 10, 2/2003, pp. 18-20. Paszota Z. (2004). An Energy Behaviour Comparison of two Kinds of Hydrostatic Drive of Ship Deck Machines. Brodogradnja – Journal of Naval Architecture and Shipbuilding Industry, Brodarski Institut Zagreb, Vol. 52, 3/2004, pp. 213-222. Paszota Z. (2007). Energy saving in a hydraulic servomechanism

Abstract

The carrying structure of the bridge over the Jiu River at Aninoasa consists in two parallel concrete arches with variable height of the cross section, sustaining a concrete deck through vertical concrete hangers. In the time period passed since the bridge was erected, some structural elements shown damages. In order to establish the technical state of the bridge, a technical appraisement was performed and according to this, the most exposed elements to the risk of failure are the hangers.

The purpose of this paper is to present briefly both, the method used to test the actual bridge carrying capacity in situ and the finite element model developed for the static and dynamic analysis of the structure.

In order to estimate the state of the structural elements, two ways were followed. In the first stage, a test project was carried out and in the second stage, a complete 3D finite element model was developed to analyze the bridge structure.

The test project has foreseen the loading of the bridge by heavy unloaded trucks, disposed in some positions on the deck and the measurements of the deck and arches displacements. The positions of the trucks were established in order to obtain the maximum values both for arches transverse displacements and vertical displacements of the deck. Using electro-resistive transducers the hangers elongations and strains values on their cross section were also measured. These measured values were compared with those obtained from the numerical calculations performed by using the complete finite element model. By means of the finite element model, also the response of the structure following the dynamic action of vehicles was investigated.

Abstract

Road bridges with steel arches are used efficiently for medium and large spans. These solutions show advantages determined by the arches geometry, by the number and distributions of hangers and by the form and type of the arches bracing system.

The appearance of the welding as standard connection procedure for steel bridges, for road bridge decks two solutions are mainly used:

- the solution with a concrete slab acting together with the stringers and cross beams (the composite solution);

- the solution with orthotropic deck (the orthotropic deck consists in a network formed by the continuous longitudinal stiffeners and cross beams connected at the upper part by a steel plate).

In this paper a comparative study of the strength and fatigue checks performed on the new road bridge over river Argeşel near Mioveni in Argeş county is presented. The results are obtained using the Romanian standards STAS 1844-75 and SR 1911-1998 and the European norms SR EN 1990, SR EN 1993 and SR EN 1994. The deck was designed with two parallel steel arches, which are sustaining through vertical hangers a concrete slab connected with steel girders at the way level.

The aim of the paper is to outcome the safety factors obtained from checks performed on steel hangers using the Romanian standards with respect with those obtained using Eurocodes.

Mathematicae   109 (3): 805-827. Han, S. E. (2010b). Multiplicative property of the digital fundamental group, Acta Applicandae Mathematicae   110 (2): 921-944. Han, S. E. (2010c). KD-( k 0 , k 1 )-homotopy equivalence and its applications, Journal of the Korean Mathematical Society   47 (5): 1031-1054. Han, S. E. (2010d). Properties of a digital covering space and discrete Deck's transformation group, The IMA Journal of Applied Mathematics , (submitted). Khalimsky, E. (1987). Motion, deformation, and homotopy in finite spaces, Proceedings of IEEE International