A steel composite bridge needs to be considered and analyzed for both the before-composite and after-composite states depending on the construction stage or the different types of loads applied. Accordingly, the wizard can generate various construction sequence data.
Define the construction stages for the bridge
Internally, Define Construction Stages and Define Composite Section for Construction Stage features.
Check to activate and define the construction stages.
Deck Pouring Sequence : Check to activate the deck pouring sequences. If checked Deck pouring sequence, deck concrete is not poured for the entire bridge at the same time.
Deck Split Construction
From the basic information created by the program, specify the deck split with more detail.
First, select one of the Deck Stage that needs to be modified from the bottom of the Modify Deck Split Construction Stage dialog box. Second, in the Deck List, select the deck that needs to be moved to the Selected Deck List. Repeat the second step until the modification is completed. Finally, click [OK] to close.
Deck Stage : Stage in which selected deck sections are activated in. This Deck Stage is not the same stage as in the global construction stage. Also, the deck stage number must start from 1 and increase by 1 only.
Duration : Duration of the construction stage in days.
Deck List : Decks that are available to be activated in the selected stage.
Set Deck List : Decks to be activated in the selected stage.
The number of Construction Stages and Deck List that can be specified according to the number of intermediate points are automatically generated. (ex. Two intermediate points → Construction Stage : 1~5, Deck List : D1~5)
Advanced : Specify to define asymmetrical negative moment zone lengths for the left and right sides from the support.
Negative-moment zone length : Length of the negative moment zone in all support. A half of the Negative-moment zone length are assigned to each left and right sides from the support. This length is based on the deck split length for the deck pouring sequence stages.
The length entered here corresponds to the length of the section for D2, D4, D6, etc. in the segmental construction.
If selected, the length of the negative moment zone can be applied differently for each intermediate segment.
Long Term Boundary Group...
All frame type, when Multiple Modulus of Elasticity which is a modular ratio of 3n to account in an approximate way for the effect of concrete creep is defined in Section Data > Composite section, stiffness scale factor is created accordingly with Composite section, then new Boundary Group is generated. When this option is checked, selected boundary group to be used throughout the long term effect construction sequence. In other modeling types (All Plate, Deck as Plate, Deck & Web as Plate modeling type), it is disabled.
Define Reinforcement... : Check to define the longitudinal and shear reinforcements for the deck.
If the reinforcement is defined, the reinforcements are considered for calculating the section stiffness.