Experimental investigation of focused wave action on coastal bridges with box girder

Coastal bridges are exposed to hurricane waves and storm surges during hurricanes, which threaten the safety of the superstructures. Since waves and ocean currents coexist in the natural marine environment and the action of currents leads to changes in wave parameters and thus affects wave loads, considering their interaction is necessary for the study of wave forces on coastal bridges. In this study, hydrodynamic loads on a box girder with the joint action of regular waves and currents are investigated with both experiments and numerical models. A series of experiments of wave forces that include conditions with different wave heights, current velocities, wave periods and submergence depths are conducted in a wave flume. Two-dimensional numerical simulations are performed to further investigate the mechanics of wave-current forces on box girder bridges. The wave parameters and wave forces of the numerical simulations are compared with the experimental results. The results indicate that a following current usually leads to higher maximum horizontal forces and lower maximum vertical forces. The opposing current results in a higher maximum hydrodynamic vertical force than following current with a low submergence depth. However, due to the joint effect of the wave parameters and structure position relationships, the behaviours of wave forces in other situations become complicated. It is anticipated that this study can provide experimental data of wave-current forces for the superstructures of box girder bridges and enhance the understanding of the mechanism of bridge damage by waves and currents.

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Experimental investigation into stressing state characteristics of large-curvature continuous steel box-girder bridge model

Construction and Building Materials ◽

10.1016/j.conbuildmat.2018.05.155 ◽

2018 ◽

Vol 178 ◽

pp. 574-583 ◽

Cited By ~ 12

Author(s):

Jun Shi ◽

Weitao Li ◽

Kaikai Zheng ◽

Kangkang Yang ◽

Guangchun Zhou

Keyword(s):

Experimental Investigation ◽

Continuous Steel ◽

Box Girder ◽

Large Curvature ◽

Steel Box Girder ◽

Bridge Model ◽

Box Girder Bridge ◽

Girder Bridge ◽

Steel Box Girder Bridge

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Experimental investigation on inelastic behavior of composite box girder under negative moment

International Journal of Steel Structures ◽

10.1007/s13296-012-1007-0 ◽

2012 ◽

Vol 12 (1) ◽

pp. 71-84 ◽

Cited By ~ 11

Author(s):

Qing-Tian Su ◽

Guo-Tao Yang ◽

Chong Wu

Keyword(s):

Experimental Investigation ◽

Inelastic Behavior ◽

Box Girder ◽

Negative Moment

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An experimental investigation of the effects of imperfections on the strength of steel box girders

Canadian Journal of Civil Engineering ◽

10.1139/l88-060 ◽

1988 ◽

Vol 15 (3) ◽

pp. 443-449 ◽

Cited By ~ 4

Author(s):

R. M. Korol ◽

E. G. Thimmhardy ◽

M.S. Cheung

Keyword(s):

Experimental Investigation ◽

Residual Stresses ◽

Carrying Capacity ◽

Scale Model ◽

Bridge Structure ◽

Box Girders ◽

Box Girder ◽

Geometric Imperfections ◽

Longitudinal Stiffeners ◽

The One

As part of a major study, an experimental box girder having nominally identical cantilever sections was constructed to model the geometry of a pier girder of the Hunt Club–Rideau Bridge structure in Ottawa. The one-fourth scale model did not, however, replicate the varying depth of the prototype. The objective was to determine whether a deliberate reduction in the gross heat input for welds attaching longitudinal stiffeners to the flange plates for one end of the girder (and hence would incur reduced plate distortions and residual stresses) could augment the carrying capacity of a statically loaded box girder. In fact, the results from the two tests are such as to suggest that inward bent transverse stiffeners may account for a greater reduction in strength than do the imperfections of local plate panels of compression flanges. Key words: box girders, bridges, experiments, geometric imperfections, residual stresses, strength, structural steel.

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A Theoretical and Experimental Investigation of a Gas Dynamic Model for a Single Stage Reciprocating Compressor with Intake and Delivery Pipe Systems

Journal of Mechanical Engineering Science ◽

10.1243/jmes_jour_1972_014_034_02 ◽

1972 ◽

Vol 14 (4) ◽

pp. 264-279 ◽

Cited By ~ 10

Author(s):

R. S. Benson ◽

A. Ş. Üçer

Keyword(s):

Experimental Investigation ◽

Delivery Systems ◽

Wave Action ◽

Single Stage ◽

Reciprocating Compressor ◽

Gas Dynamic ◽

Test Conditions ◽

Wide Range ◽

Delivery Pipe ◽

Good Agreement

A method is described for simulating a single stage reciprocating compressor. A model is developed which allows for wave action in the intake and delivery systems, and drag and inertia of the valves. It is shown that homentropic theory may be used for the wave action, provided a correction is made for the entropy changes across the valve. The results are given of an experimental investigation in which the pressures in the intake and delivery systems, the cylinder pressures, the mass flow and the valve movement were compared with the predictions using the model. Good agreement was obtained over the wide range of test conditions.

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NUMERICAL MODELLING OF SOLITARY AND FOCUSED WAVE FORCES ON COASTAL-BRIDGE DECK

Coastal Engineering Proceedings ◽

10.9753/icce.v36.structures.12 ◽

2018 ◽

pp. 12 ◽

Cited By ~ 1

Author(s):

Rameeza Moideen ◽

Manasa Ranjan Behera ◽

Arun Kamath ◽

Hans Bihs

Keyword(s):

Water Waves ◽

Bridge Deck ◽

Experimental Studies ◽

Wave Forces ◽

Extreme Waves ◽

Shallow Water Waves ◽

Wave Impact ◽

Coastal Bridges ◽

Focused Wave ◽

The Impact

In the recent past, coastal bridges have been subjected to critical damage due to extreme wave attacks during natural calamities like storm surge and tsunami. Various numerical and experimental studies have suggested different empirical equations for wave impact on deck. However, they do not account the velocities of the wave type properly, which requires a detailed investigation to study the impact of extreme waves on decks. Solitary wave assumption is more suitable for shallow water waves, while the focused wave has been used widely to represent extreme waves. The present study aims to investigate the focused wave impact on coastal bridge deck using REEF3D (Bihs et al., 2016).

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