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Summary Storey Results

This service provides results directly produced by the IRS analysis (see Reduced analysis model ). At this time, this service is dedicated to result output for the seismic analysis of buildings. It provides single results per storey, such as mass, position of mass center, displacement, acceleration…

Pre-requisites for using Summary Storey Results:

• storeys must be defined
• the reduced analysis model must be enabled in the solver settings

The service may be found in the Results service. It is available only after a successful dynamic analysis using the reduced model.

Output Settings

The output settings are presented here according to the various types of results that can be obtained from this service. There are 4 types of results:

• Storey Data: information of the reduced analysis model, such as the mass and the position of the mass center of each storey
• Displacements: displacements at the mass center of each storey
• Accelerations: accelerations at the mass center of each storey
• Inter-storey drift: relative displacements at the mass center of each storey, relative to the storey immediately below

Result type Storey Data

For mass combinations, it displays for each storey the total mass and the coordinates of the mass center.

For ELF seismic load cases, summary information about computed storey forces is displayed.

Type of loads

selection of the type of load

Mass combinations

selection of the combination of mass groups or eigenmode for a given combination of mass groups.

Selection

type of selection; the possible choices are

• All storeys
• Named selection
• Single storey

Named selection

named selection that contains a set of storeys; only if Selection = Named selection

Storey

dropdown menu for selection of a single one; only if Selection = Single storey

Draw values

tick to draw values on the drawing

Draw units

tick to draw values with their units on the drawing

Result type

types of results; possible choices are

• Displacements
• Inter-storey drift
• Accelerations
• Storey Data

Values

main component to be displayed; only when an ELF seismic load case is selected

Fx, Fy, Fz : components of the seismic storey forces

Ftot : resultant seismic force per storey

M : mass of each storey

Additional values

allow to show more than one result component simultaneously on the drawing.

Content of the output table for mass combinations

In the case of storey data output for a mass combination, the following columns are displayed in the preview and table output, for each storey:

M: mass of each storey, taken as the max value of M_xx, M_yy and M_zz

X_G, Y_G, Z_G: GCS-coordinates of the mass center of each storey

M_xx, M_yy, M_zz: mass components of each storey, in X, Y, Z direction of the GCS

I_xx, I_yy, I_zz: mass inertia components of each storey, around X, Y, Z axes of the GCS

In common cases, M = M_xx = M_yy = M_zz. However, they may differ in the following cases:

• non-isotropic boundary conditions: rigid supports with different properties in X, Y and Z direction and the supported structural entity has non-zero mass
  
• use of mass direction components (see Dynamics section in the solver setup)
  
  
• use of directional mass coefficients in mass definition
  

Result types Displacements, Accelerations & Inter-storey drift

Displacements & Accelerations are available for eigenmodes and dynamic seismic load cases. The values of displacement & acceleration components are given at the mass center of each storey. Thsi also applies to inter-storey drift results.

Results for mass combinations are raw, normalized results from modal analysis, without effect of response spectrum.

Results for seismic load cases are values after modal superposition.

Displacement, acceleration and inter-storey drift summary storey results are not supported for ELF load cases.

Type of loads

selection of the type of load

• Mass combinations
• Load cases

Mass combination

list of available eigenmodes for each computed combination of mass groups; only if Type of loads = Mass combinations

Load cases

list of available seismic load cases; only if Type of loads = Load cases

Selection

type of selection; the possible choices are

• All storeys
• Named selection
• Single storey

Named selection

named selection that contains a set of storeys; only if Selection = Named selection

Storey

dropdown menu for selection of a single one; only if Selection = Single storey

Extreme

filter extreme results; possible choices are

• No
• Section (relevant only for seismic load cases)
• Member (relevant only for seismic load cases)
• Global

Draw values

tick to draw values on the drawing

Draw units

tick to draw values with their units on the drawing

Result type

types of results; possible choices are

• Displacements
• Inter-storey drift
• Accelerations
• Storey Data

Values

main component to be displayed;

for Result type = Displacements

u_x, u_y, u_z : displacement at mass center according to GCS axes

φ_x, φ_y, φ_z : rotation at mass center around GCS axes

for Result type = Inter-storey drift

Δux, Δuy, Δuz : relative displacement at mass center according to GCS axes, relative to the storey immediately below

Δφ_x, Δφ_y, Δφ_z : relative rotation at mass center around GCS axes, relative to the storey immediately below

for Result type = Accelerations

Ax, Ay, Az : acceleration at mass center according to GCS axes

AlphaX, AlphaY, AlphaZ : rotational acceleration at mass center around GCS axes

Additional values

allow to show more than one result component simultaneously on the drawing.

When only the main component is selected (no additional value ticked), the selected component is drawn in the corresponding direction.

When one or more additional value is ticked, all selected components are listed in the plane of the screen for better readability.

Limit values

for each result component, definition of min and max value for colour coding on the drawing. Colours may be configured in Settings > Colours/Lines.

Default colour coding is as follows:

Values lower than V_min are display in red

Values between V_min and V_max are displayed in gray

Values greater than V_max are displayed in blue

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