Function
- Check safety verification results for the no-collapse requirement (ultimate limit state) under the seismic design situation in a spreadsheet format table. Partial factors for material properties applied on member capacities are taken from the Design>Steel/Concrete Design Parameters>Partial Safety Factors. Second-order effects can be taken into account by checking on Consider P-Delta Effect in the Design>Pushover Analysis>Pushover Load Case.
- For the ductile member, safety verification is checked in terms of member deformations (chord rotations) with appropriate material partial factors and confidence factor applied on member deformation capacities. For the brittle member, safety verification is checked in terms of member forces (shear forces) with appropriate material partial factors and confidence factor applied on member force capacities.
- Currently, this verification is performed only for the beams and columns of RC and steel structure.
Note
In order to use this function, first the target displacement for the design spectrum must be calculated from Design>Pushover Analysis>Pushover Curve.
- Table Tool in Gen NX offers a variety of powerful built-in functions. Refer to the Usage of Table Tool for detailed information.
Call
From the Main Menu select [Pushover] tab > [Table] group > [Result Tables] > [Safety Verification Table]
Select [Design Tables] > [Pushover Analysis] > [Safety Verification] in the Tables tab from the Tree Menu.
Input
The dialogue box that appears for the generation of the safety verification table is subjected to selection of capacity spectrum for target displacement in Pushover Curve.
The following dialogue box will appear once the elements for which the safety verification table has to be generated are defined.
Pushover Load Case : Specify the pushover load case for which the safety verification table has to be generated.
Step for Demand : Specify the limit state for which the safety verification table has to be generated.
The capacity values can also be generated when the safety verification table is generated for the user defined step. The limit state for capacity can be selected.
Upon executing the Safety Verification function, the Set Safety Verification Parameters Dialog is invoked. Click the OK Button after setting the parameters such as load cases, step for demand, confidence factor, and component.
Fig. Safety Verification Table
Elem : Element Number
Location : Output position along the length of each element
Seismic Element : Primary seismic element or secondary seismic element. Secondary seismic elements are specified in Design>Pushover Analysis>Pushover Global Control.
Load : Name of Pushover Load Case
Verify Ductile Mechanism : Safety verification for the beams and columns under flexure with or and without axial force.
Demand : The total chord rotation (elastic plus inelastic part) corresponding to Limit State is considered.
Capacity : The total chord rotation capacity (elastic plus inelastic part) corresponding to Limit State is considered.
Remark : Verification results
Verify Brittle Mechanism : Safety verification for the shear mechanism of beams and columns.
Demand : The shear force corresponding to Limit State is considered.
Capacity : The shear resistance corresponding to Limit State is considered.
Remark : Verification results
Note
Capacity for assessment
(1) Reinforced Concrete Structures (Beam & Column) (Eurocode8-3:2004, Annex A.3.1)
*For ductile elements, mean values of properties divided by CF are used. For brittle members, mean values of properties divided by CF and by partial factor.
(2) Steel Structures (Beam & Column) (Eurocode8-3:2004, Annex B.5.2)
*For ductile elements, mean values of properties divided by CF are used. For brittle members, mean values of properties divided by CF and by partial factor.
*θy= MyL/6EI
Where, My: Yield moment, L: Length of a member, E: Elasticity of Modulus, I: moment of inertiadown text here.
The dialogue box will appear once the elements for which the safety verification table has to be generated are defined.
Pushover Load Case : Specify the pushover load case for which the safety verification table has to be generated.
Step for Demand : Specify the limit state for which the safety verification table has to be generated.
The capacity values can also be generated when the safety verification table is generated for the user defined step. The limit state for capacity can be selected.
Upon executing the Safety Verification function, the Set Safety Verification Parameters Dialog is invoked.
Click the OK Button after setting the parameters such as load cases, step for demand, confidence factor, and component.
Fig. Safety Verification Table
Elem : Element Number
Location : Output position along the length of each element
Seismic Element : Primary seismic element or secondary seismic element. Secondary seismic elements are specified in Design>Pushover Analysis>Pushover Global Control.
Load : Name of Pushover Load Case
Verify Ductile Mechanism : Safety verification for the beams and columns under flexure with or and without axial force.
Demand : The total chord rotation (elastic plus inelastic part) corresponding to Limit State is considered.
Capacity : The total chord rotation capacity (elastic plus inelastic part) corresponding to Limit State is considered.
Remark : Verification results
Verify Brittle Mechanism : Safety verification for the shear mechanism of beams and columns.
Demand : The shear force corresponding to Limit State is considered.
Capacity : The shear resistance corresponding to Limit State is considered.
Remark : Verification results
Note
Capacity for assessment
(1) Reinforced Concrete Structures (Beam & Column) as
*For ductile elements, mean values of properties divided by CF are used. For brittle members, mean values of properties divided by CF and by partial factor.
(2) Steel Structures (Beam & Column)
*For ductile elements, mean values of properties divided by CF are used. For brittle members, mean values of properties divided by CF and by partial factor.
*θy= MyL/6EI
Where, My: Yield moment, L: Length of a member, E: Elasticity of Modulus, I: moment of inertiadown text here.
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