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Reinforced Concrete Liners
The Reinforced Concrete liner type, introduced in Phase2 version 7, greatly simplifies the task of modeling composite two-component liner systems such as reinforced concrete, or steel sets and shotcrete.
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The reinforcement component is typically steel (e.g. rebar, I-beam, lattice
girder)
The concrete component may represent concrete, shotcrete or other
material
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The properties of the reinforcement and the concrete are defined separately in the input dialog. Phase2 uses this input data to determine a homogeneous beam cross-section which has properties equivalent to the actual reinforced liner.
Input data for reinforced concrete liner type
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Reinforced Liners: Database
A database of common reinforcement types is available by selecting the Common Types button in the liner properties dialog. The default database contains over 1000 entries for:
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I-Beam
Lattice Girder
Hollow Section
Rebar
Wire Mesh
Channel
Double Channel
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The database can be customized by adding additional support types.
Reinforcement database dialog
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Reinforced Liners: Support Capacity Plots
After the analysis, the forces within the reinforcement and concrete components are back-calculated from the overall results and displayed on support capacity plots in the Phase2 Interpret program
Support capacity plots display thrust versus bending moment and thrust versus shear, for the reinforcement component and the concrete component. Factor of safety envelopes are generated which allow you to easily determine if the liner forces exceed the liner strength.
Support capacity plots for reinforced concrete liner type
The plots are interactive, and you can click on any data point to highlight the corresponding liner element on the model
Thrust versus shear diagram for concrete liner on circular tunnel
Thrust versus bending moment for concrete liner on circular tunnel
For a practical example see Tutorial 24 - Tunnel Lining Design.
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