The structural model tab contains the inputs for both the in-place restraints and loading, and the stripping and handling stages.
In-Place Condition
Bearing
The bearing section contains all the inputs required for the plain and reinforced bearing capacity analysis. For more information on these inputs and the analysis see Bearing Capacity.
Dapped Ends
The user has the option to include a dap analysis at entire the start or the end of the member. This analysis is done following the PCI Design Handbook 8th edition. A set of options exist to control the dap geometry, loading, and reinforcement. The user can also choose to cut the dap out of the concrete extents if desired.
Ledge
The user has the option to include a ledge analysis. This analysis is done at two locations, one assumed to be near the end and one assumed to be in the middle of the member. The user specifically inputs the loads to be used in this analysis. This analysis is done using either the PCI Design Handbook 8th or 7th edition.
Loading
Loads can be entered as vertical concentrated loads, vertical distributed loads, point moments, lateral concentrated loads, and lateral distributed loads. Because of this it is possible to perform a biaxial analysis within Eriksson Beam. At a givin loading location, the user can defined the non composite dead load, topping load, composite dead load, live load, roof load (snow / rain), wind pressure, wind section, and seismic.
When performing the analysis only pressure or suction will be present at a time on the member. It is also assumed the sign of seismic loads can change and thus it will also reverse the sign of seismic loading and check that case as well.
Loading Options
Options | Description |
|---|---|
Live load(s) applied as roof loads | Live loads input will be input as Lr and use the Roof load factors |
Automatically add topping weight | Automatically computes topping weight based on geometry input on concrete extents tab and applied it to the member |
Ignore left cantilever loading | Ignores all loading before the first bearing point. This option can be used to prevent negative moments prior to the start bearing point. |
Ignore right cantilever loading | Ignores all loading after the end bearing point. This option can be used to prevent negative moments after the final bearing point. |
Self weight multiplier | Allows the user to modify the self weight. |
Roof loads applied as… | Live Load: Will be considered for live load regain for losses and not use any deflection multipliers. Composite Dead Load: Will be treated as a sustained load for losses and use the composite dead load deflection multiplier |
Stripping and Handling
Stripping and handling contains three optional stages for stripping, handling, and erection. More details about what these stages contains can be found on our analysis stages page here <MAKE URL>. Each of these stages contain the following input:
Input | Description |
Load Multiplier | A load factor used on all self-weight loading for the given analysis stage. |
Downward Face | Specifies which face of the member, as shown on the concrete extents tab, is downward facing. This option can be used for members like spandrels which are often cast on their side. |
Concrete Strength | Specifies if the analysis should use the initial concrete properties (fci and Eci) or the final concrete properties (fc and Ec). |
Stress Limits | Sets the stress limits to be either the transfer stress limits or to use the final serviceability checks. |
Pick Points | Set the analysis to a 2-point or a 4-point pick. The 4-point pick analysis uses a rolling block analysis to couple the first two reactions together and the last two reactions together. |
Lift Locations | Defines the lifters locations from the specified end of the member. Lateral locations of the lifters are ignored. |