Composite deck pouring is a method of constructing a bridge deck where the deck and the girders act together as a single structural unit, which can significantly increase the load-carrying capacity of the bridge. In steel tub girder bridges, composite deck pouring is achieved by using a concrete deck that is poured onto the top flanges of the steel girders, which are typically designed with shear connectors such as studs or shear tabs.
The composite deck pouring sequence typically involves the following steps:
Preparing the steel girders: The steel girders are fabricated and erected, and the top flanges are prepared with shear connectors such as studs or shear tabs.
Placing the formwork: Formwork is placed on top of the girders to create a mold for the concrete deck.
Placing the reinforcement: Reinforcement, such as steel bars or mesh, is placed within the formwork to provide additional strength to the deck.
Pouring the concrete: Concrete is poured into the formwork and leveled to create a flat surface for the deck.
Finishing the surface: The surface of the concrete is finished with a trowel to create a smooth, even surface.
Curing the concrete: The concrete is left to cure, typically for several days, to gain strength and durability.
Applying the wearing surface: A final layer of asphalt or other wearing surface is applied to protect the concrete deck and provide a skid-resistant surface for vehicles.
During composite deck pouring, the girders and the concrete deck are designed to work together to carry the load of the bridge. The shear connectors on the top flanges of the girders transfer the load between the girders and the deck, creating a composite structure that is stronger than either component alone. The result is a bridge that can carry heavier loads and has a longer lifespan than a non-composite deck.
Prior to the deck pouring stages, it is important to confirm that the substructure elements such as foundations, piers, pier caps, abutments, and superstructure elements girders, and bracings have been constructed. In some models, substructure elements may not exist and fixed supports may be present at the bearing locations. For such models, it is necessary to ensure that girders and bracings have been constructed in the previous stages. It is also crucial to apply the formwork load in the previous stages.
Please follow the instructions provided below to define construction of bridge components.
| 1 | Navigate to Loading > Construction > Superstructre > Deck |  |
| 2 | You should specify the states of deck construction stage, which include deck pouring and hardening, in this section. | |
| 3 | Click three-dots icon on Pouring Stage (Weight Only) cell. Select all of the stages that are related to Pouring Stage the Deck concrete which were defined in the previous steps. Then enter the names of the deck construction stages in Name. |   |
| 4 | Click three-dots icon on Hardening Stage (Gains Stiffness) cell. Select the stages at which the Pouring stage will Harden, in the staged concrete pouring process for the deck. Select Hardening Stage (Gains Stiffness) as in the figure |    |
| 5 | "In the corresponding stage, select the deck that is to be constructed. |  |
| 6 | Navigate to the Longitudinal tab and enter the stations for deck pouring in the longitudinal direction. |  |
| 7 | You can make adjustments to the "Transverse" tab if you wish. |  |
Follow the below steps to copy and paste all inputs from our data set.
| 1 | Go to Deck under Superstructure on the tree view. |
| 2 | Copy Deck Casting, Longitudinal and Transverse from model inputs and paste into OpenBrIM. |
Copy the desired data with the automatic copy button in the upper left corner. Click on the first cell in and use the Ctrl+V shortcut to paste.  
If icon won’t appear, collapse page tree menu by clicking on arrow or using shortcut “[”.  While pasting large data, it would be handy to turn of Auto-refresh . 
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Deck | ||
|---|---|---|
Deck Casting | Longitudinal | Transverse |
DeckCasting1 Cast1PourStage Cast123GainStiffStage Deck1 0 0 Ignore DeckCasting2 Cast2PourStage Cast123GainStiffStage Deck1 0 0 Ignore DeckCasting3 Cast3PourStage Cast123GainStiffStage Deck1 0 0 Ignore DeckCasting4 Cast4PourStage Cast45GainStiffStage Deck1 0 0 Ignore DeckCasting5 Cast5PourStage Cast45GainStiffStage Deck1 0 0 Ignore | DeckCasting1 0 120 DeckCasting2 210 310 DeckCasting3 400 520 DeckCasting4 310 400 DeckCasting5 120 210 | DeckCasting1 Complete 0 0 0 0 DeckCasting2 Complete 0 0 0 0 DeckCasting3 Complete 0 0 0 0 DeckCasting4 Complete 0 0 0 0 DeckCasting5 Complete 0 0 0 0 |
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