Issue 1: Jan.-Apr. 2022
Published online on May 2022
Enhanced Dynamic Response of Bridge Systems with Cellular Shear Walls
Spyridoula-Maria Papathanasiou, Panagiota Syrimi, Panos Tsopelas
Abstract:Light-weight shear wall panels with deterministic cellular periodic architecture could provide the means for controlling vibrations in large scale structural systems. The behavior of shear walls comprising of cellular solids when excited by seismic loading is studied. An investigation to evaluate the effects of different cellular configurations is conducted, including the orientation angles and the shapes of the cells (honeycomb, reentrant, and chiral architecture). The cellular walls may be appropriately arranged between the columns of a pier of a concrete bridge system for seismic resistance enhancement in both directions. Appropriate simplified Finite Element Models are developed to predict the stiffness, strength, and energy dissipation capacity of shear wall panels when subjected to monotonic and cyclic shear loading. The total column-cellular wall-deck system behavior is studied with simple stick models after the calibrated wall properties have been taken into account. Aiming to enhance the stiffness and damping properties of the cellular walls, the idea of inserting viscoelastic fillers into the cells is developed in the final part of this study.
International Journal of Bridge Engineering, Vol. 10, No. 1, 2022: pp. 1-14
Form-Finding of Deck-Arch Bridge Through Graphical and Numerical Computational Tools
Mayank Singh
Abstract:The study deals with obtaining a design process for 2-hinged and 3-hinged deck-arches using principles of 2D graphic statics, parametric and mathematical modelling. The iterative process starts with the dead load of a straight horizontal deck and the vehicular live loads; it proceeds to incorporate the self-weight of the funicular arch and the spandrel piers. At every step the shape is modified based on funicular form finding which alters the lengths and weights of the spandrel piers which in turn affect the arch profile. The process repeats until convergence is achieved. The dynamic (vehicular) loads lead to an envelope of funicular profiles, which are then compared with a generic parabolic and a generic catenary profile of the same span and rise. Results like in-plane moments, horizontal thrust, vertical reactions, axial forces, deflections are compared.
International Journal of Bridge Engineering, Vol. 10, No. 1, 2022: pp. 15-42
The Investigation of the Damages of Bridges Subjected to the 2020 Flood in Poldokhtar
Saman Mansouri, Majid Pouraminian
Abstract:The investigation of the performance of bridges against various natural calamities has always been studied by researchers. Flood is one of the most important natural disasters and its effects on the performance of bridges are always considered. In this paper, the performance and damages of bridges subjected to the 2020 flood were evaluated in Poldokhtar. The studied bridges are including several steel truss bridges, a historic bridge and a bridge with a RC deck and masonry columns. Field studies have been used to investigate the effects of floods on bridges. The result of studied showed that the lack of proper connection of the deck to the abutments and cap beams has been the main reason for the destruction of the truss bridges against floods and the studied truss bridges do not perform well against floods, also it is clear that the masonry columns have a very good performance against the strongest floods due to its circular shape, considerable diameter, integrated structure and the use of breakwaters around them. Besides woods, trees, power transmission towers, etc., which are floating can gather in the front of the bridge and this process can lead to extra pressure on the bridges due to flood. The results of studies can be used in retrofitting the exist bridges, also writing or editing regulations of bridges design against flood.
International Journal of Bridge Engineering, Vol. 10, No. 1, 2022: pp. 43-77
Study of the Effects of Some Variables on Non–Dimensional Deflections of Rectangular Laminated Decks Plates
Osama Mohammed Elmardi Suleiman Khayal, Merdaci Slimane
Abstract:Using dynamic relaxation numerical technique (DR), it was decided to undertake some study cases and generate new results for uniformly loaded laminated rectangular decks plates. The plates were assumed to be either simply supported or clamped on all edges. The effects of transverse shear deformation, material anisotropy, orientation, and coupling between stretching and bending on the deflections of laminated plates are investigated.
International Journal of Bridge Engineering, Vol. 10, No. 1, 2022: pp. 79-106