scholarly journals Examples of Solutions for Steel-Concrete Composite Structures in Bridge Engineering / Przykłady Konstrukcji Zespolonych W Budownictwie Mostowym

2015 ◽  
Vol 16 (1) ◽  
pp. 51-68
Author(s):  
Kazimierz Flaga ◽  
Kazimierz Furtak
Keyword(s):  
Structural Design ◽  
Composite Structures ◽  
Concrete Structures ◽  
Design Analysis ◽  
Bridge Engineering ◽  
Structural Composition ◽  
Points Of View

Abstract The aim of the article [1] was to discuss the application of steel-concrete composite structures in bridge engineering in the aspect of structural design, analysis and execution. It was pointed out that the concept of steel-concrete structural composition is far from exhausted and new solutions interesting from the engineering, scientific and aesthetic points of view of are constantly emerging. These latest trends are presented against the background of the solutions executed in Poland and abroad. Particular attention is focused on structures of double composition and steel-concrete structures. Concrete filled steel tubular (CFST) structures are highlighted.

CULVERT ON THE JOŠANICA RIVER (JOŠANIČKI POTOK)

2020 ◽  
Author(s):  
Biljana Buhavac
Keyword(s):  
Structural Design ◽  
Software Package ◽  
Concrete Structures ◽  
Line Model ◽  
Frame Construction

The bridge is one of the most important buildings used to overcome natural and artificial obstacles. The paper presents a constructed culvert (small bridge) on the river Jošanica, which was designed according to EN 1990 (Basics for structural design), EN 1991-1 (Structural loads) and EN 1991-2 (design of concrete structures). line model 2D (closed frame construction) calculated in the software package Tower 7. The paper approaches the modeling of structures and taking an adequate load. It would be necessary for further research to perform omission auscultations and examine the applicability of the applied methodology for modeling and calculation of the structure.

Structural Design Analysis

1991 ◽  
pp. 303-404
Author(s):  
Donald V. Rosato ◽  
David P. Di Mattia ◽  
Dominick V. Rosato
Keyword(s):  
Structural Design ◽  
Design Analysis

Vibroacoustic design optimization of curved composite shells

2021 ◽  
Vol 29 (9_suppl) ◽  
pp. S1520-S1531
Author(s):  
Rilwan K Apalowo ◽  
Dimitrios Chronopoulos
Keyword(s):  
Optimal Design ◽  
Structural Design ◽  
Composite Structures ◽  
Sensitivity Analyses ◽  
Computational Time ◽  
Design Parameters ◽  
Sandwich Shell ◽  
Acoustic Transmission ◽  
Composite Shells ◽  
Model Composite

The need to simultaneously optimize the structural design properties, and attain a satisfactory vibroacoustic performance for composite structures, has been a challenging task for modern structural engineers. This work is aimed at developing a statistical energy analysis (SEA) based numerical scheme for computing the optimal design parameters of each individual layer of layered curved shells having arbitrary complexities and layering. The main novelty of the work focuses on the computation of SEA properties for curved composite shells and derive the sensitivities of the acoustic transmission coefficient, expressed through the computed SEA properties, with respect to the structural design characteristics to be optimized. A wave finite element approach is employed to calculate the wave propagation constants of the curved shell. The calculated wave constants are then applied to compute the vibroacoustic properties for the curved shell using a SEA approach. Sensitivity analyses are conducted on the vibroacoustic properties to estimate their response to changes in the structural properties. Gradient vector is then formulated and hence the Hessian matrix, which is employed to formulate a Newton-like optimisation algorithm for optimizing the properties of the layered composite shell. The developed scheme is applied to a sandwich shell; optimal design parameters of [Formula: see text] and [Formula: see text] are obtained for the facesheet and the core of the shell whose base parameters are [Formula: see text] and [Formula: see text], respectively. This simultaneously optimizes the structure with maximum stiffness and minimum mass and attains a satisfactory dynamic performance for acoustic transmission through the sandwich shell. The principal advantage of the scheme is the ability to accurately model composite panels of arbitrary curvature at a rational computational time.

CNT/epoxy interleaves for strengthening performance of filament wound composite structures

2021 ◽  
pp. 2140001
Author(s):  
Soo-Jeong Park ◽  
Yun-Hae Kim
Keyword(s):  
Structural Design ◽  
Composite Structures ◽  
Influencing Factor ◽  
Interfacial Bonding ◽  
Filament Wound ◽  
Interfacial Bonding Strength ◽  
The Matrix ◽  
Filament Wound Composite ◽  
Low Performance ◽  
Wound Composite

The failure mechanism of composites dominates the matrix, fiber and interface, and in general, the matrix corresponds to the definitive cause of damage. A filament–wound composite structure involves a notable bridging effect owing to the matrix between the layers, and particle additives are generally adopted to strengthen the matrix. However, particle additives exhibit a low performance when applied to structures, owing to the dispersibility and particle agglomeration. In this study, the strengthening performance of carbon nanotube (CNT)/epoxy interleaves was experimentally verified to facilitate their implementation in the structural design of a filament–wound cylinder structure. The burst pressure, compression, bending and interfacial bonding strength of the cylinder improved by approximately 20%, 161%, 16% and 36%, respectively, and the positioning of CNT/epoxy interleaves was a more notable influencing factor compared to the proportion of CNTs in the entire winding layer. The number of macro voids decreased inside the epoxy modified CNT. The findings demonstrated that the incorporation of CNTs through CNT/epoxy interleaves could facilitate the matrix strengthening and enhance the interfacial bonding.

Improvements of a Nonlinear Analysis Guideline for the Re-examination of Existing Urban Concrete Structures

2019 ◽  
Author(s):  
Ane de Boer ◽  
Max A. N. Hendriks ◽  
Eva O. L. Lantsoght
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Nonlinear Analysis ◽  
Composite Structures ◽  
Concrete Slab ◽  
Concrete Structures ◽  
Nonlinear Finite Element Analysis ◽  
Nonlinear Finite Element ◽  
Reinforced Concrete Slab ◽  
Element Analysis

<p>The Dutch Ministry of Infrastructure and the Environment is concerned with the safety of existing infrastructure and expected re-analysis of a large number of bridges and viaducts. Nonlinear finite element analysis can provide a tool to assess safety; a more realistic estimation of the existing safety can be obtained.</p><p>Dutch Guidelines, based on scientific research, general consensus among peers, and a long-term experience with nonlinear analysis, allow for a reduction of model and user factors and improve the robustness of nonlinear finite element analyses.</p><p>The 2017 version of the guidelines can be used for the finite element analysis of basic concrete structural elements like beams, girders and slabs, reinforced or prestressed. Existing structures, like box-girder structures, culverts and bridge decks with prestressed girders in composite structures can be analysed.</p><p>The guidelines have been developed with a two-fold purpose. First, to advice analysts on nonlinear finite element analysis of reinforced and pre-stressed concrete structures. Second, to explain the choices made and to educate analysts, related to the responsibility of limiting model uncertainty.</p><p>This paper contains an overview of the latest version of the guideline and its latest validation extensions. Most important impact is the extended operational lifetime of an existing reinforced concrete slab structure.</p>

Development of Design Analysis Methods for Carbon Silicon Carbide Composite Structures

2007 ◽  
Vol 41 (10) ◽  
pp. 1197-1215 ◽  
Author(s):  
Roy M. Sullivan ◽  
Pappu L.N. Murthy ◽  
Subodh K. Mital ◽  
Joseph L. Palko ◽  
Jacques C. Cuneo ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Composite Structures ◽  
Design Analysis ◽  
Carbide Composite ◽  
Analysis Methods
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