Optimal schemes of radial network arch pedestrian bridges: An extensive dataset of solutions under different conditions

Belevičius, Rimantas; Juozapaitis, Algirdas; Rusakevičius, Dainius; Žilėnaitė, Sigutė

doi:10.1016/j.dib.2021.107149

Cited by 3 publications

(4 citation statements)

References 3 publications

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“…Extensive research into pedestrian NABs was conducted by Belevicius et al [59][60][61][62]. The scope of their research was to find the optimal construction scheme for pedestrian radial network arch bridges with moderate spans of 30, 45, 60, 75 and 90 m [62].…”

Section: Network Arch Footbridgementioning

confidence: 99%

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A Review of the Network Arch Bridge

Danciu,

Guțiu,

Moga

et al. 2023

Applied Sciences

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The network arch bridge (NAB) is a new structural form of arch bridge that was devised 60 years ago by the Norwegian engineer Per Tveit, who is now prof. dr. docent emeritus at the University of Agder, Norway. The network arch is a tied-arch (also known as a bowstring-arch) bridge that combines the benefits of tied-arch bridges and trusses in a single system. While in a classical tied arch, the hangers are vertical, in a network arch, the suspension of the deck to the arch is ensured through a network of inclined hangers that intersect each other at least twice. Thus, the core of the NAB is the hanger arrangement that minimizes the bending moment in the arch to very small values, leading to compression in the arch. Compression with only small bending leads to very slender cross-sections for the elements of the bridge, and deep reductions in terms of materials used and economic and environmental costs. This paper reviews the research into the structural form proposed by Per Tveit and extended by researchers and engineers worldwide. The research methodology included bibliometric literature research, obtained by interrogating the ISI Web of Science (WoS) database and the cited references from the articles on WoS. While the first structural form of a network arch is still in use today and it has proven to be a good idea for spans around 100–120 m, engineers worldwide devised new bridge cross-sections. A brief view of the types of bridge cross-section in use today is given, with details about the bridges chosen as representative. Using analysis of Prof. Tveit’s map, Structurae database and literature review, a database of the network arches around the world was created, emphasizing the development of network arches from the perspectives of continental distribution, opening year, number of structures in different structural forms, and bridge purposes. The structural form was assessed from the perspective of materials used for the arch and the tie, span, purpose and number of lanes, the presence/absence of upper wind-bracings and arch disposition in the vertical plane. In the last part of this review, the newest research into the development of the network arch is discussed. In the past 15 years we have seen an acceleration in network arch development from multiple perspectives: new materials used, such as glulam for the arch or carbon fiber-reinforced plastic for the hangers; span lengths of 250 m and 380 m for large bridge widths; architectural constraints that lead to the outward inclination of the arch, that is pleasing to the eye, but difficult to address from an engineering perspective; the most slender arch bridge in the world, with very slender cross-sections for the arch and the tie.

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Section: Network Arch Footbridgementioning

confidence: 99%

“…In ref. [61], 220 optimal parameter sets for steel radial network arch footbridges were given. For each set, the arch rise, number of hangers, the spread angle of the hangers and the dimensions of the arch, tie and hangers were provided.…”

Section: Network Arch Footbridgementioning

confidence: 99%

A Review of the Network Arch Bridge

Danciu,

Guțiu,

Moga

et al. 2023

Applied Sciences

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“…All data on optimized parameters' values of all analysed bridge schemes as well as fnite element solution results in a format similar to [32] can be obtained by request from the corresponding author.…”

Section: Data Availabilitymentioning

confidence: 99%

“…Te number of design parameters is large; and therefore, the mathematical optimization problem was formulated and solved using stochastic global optimization algorithms. In [31] the pedestrian bridge scheme of a 60 m span was investigated in detail, while [32] provides the optimal structural parameters of this bridge at diferent optimization conditions and some fxed values of structural parameters.…”

Section: Introductionmentioning

confidence: 99%

Insights into Optimal Schemes of Radial Network Arch Pedestrian Bridge

Belevičius

Rusakevičius

Valentinavičius

2022

Advances in Civil Engineering

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The main objective of the article is to find the optimal ranges of the cardinal topological, shape, and dimensional parameters that fully describe the constructional scheme of pedestrian radial network arch bridges of moderate spans. This task is solved by formulating the global optimization problem and seeking the minimum mass of the whole bridge structure. An optimal bridge scheme was obtained by tuning a large set of interdependent design parameters of diverse character: the topological parameters–the type of hanger arrangement, and the number of hangers; the shape parameters–hanger spread and central section angles, the alteration of these angles, and the arch rise; and the sizing parameters–all cross-sectional dimensions of structural members. Mathematically, this is a constrained mixed-integer global optimization problem solved by a stochastic evolutionary algorithm. Plane light-deck bridges of typical moderate 30, 45, 60, 75, and 90 m spans were optimized. Decisive design parameters and their rational ranges for all spans were revealed. In addition, the effects of some simplifications of the general bridge scheme were shown: using the constant spread and central section angles; imposing certain values on the ratio arch rise/bridge span; bounding the hanger diameters to a given value; and so on. Obtained results clearly indicate that the design recommendations for the lightweight network arch bridges should differ from the recommendations for similar automotive and railway bridges. Our findings are: the optimal ratio of arch rise to the bridge span is 0.20–0.30, the number of hangers is >40 even for the shortest spans, the spread angle between hangers is 30°–40°, and the girder mass amounts to ∼30% of the total bridge mass, while the mass of hangers amounts up to 20% and increases when imposing constraints on the minimal radius at the expense of diminishing arch mass.

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A Review of the Network Arch Bridge

Danciu,

Guțiu,

Moga

et al. 2023

Preprint

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The first Network Arch Bridge (NAB) was opened to traffic 60 years ago and since then the idea spread around the world. It is a type of a tied arch bridge that combines the benefits of tied arch bridges and trusses in a single system, thus it has a very good stiffness even in the case of extremely slender structures. In a Network Arch the hangers are inclined and some of them intersect each other at least twice. The core of a NAB is the hanger arrangement that minimizes the bending moment in the arch to very small values, leading thus to compression in the arch. This paper reviews the Network Arch idea devised by prof. Tveit and extended by researchers and engineers worldwide. A comprehensive review of the literature about the Network Arch is provided and the situation of NABs around the world from the standpoint of location, span, structural system used for the cross-section, bridge type (road, railway, combined or pedestrian) and opening year is discussed.

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Optimal schemes of radial network arch pedestrian bridges: An extensive dataset of solutions under different conditions

Cited by 3 publications

References 3 publications

A Review of the Network Arch Bridge

A Review of the Network Arch Bridge

Insights into Optimal Schemes of Radial Network Arch Pedestrian Bridge

A Review of the Network Arch Bridge

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