# Reinforced Concrete Building - Seismic Analysis and Shear Design (BIM Workflow)¶

## Introduction¶

Welcome to the Seismic Analysis and Shear Design (BIM Workflow) tutorial.

In this course we are investigating the seismic behaviour of a highrise building modelled in Revit using SOFiSTiK Analysis + Design and the SOFiSTiK Structural Desktop.

By the end of the tutorial, you should be able to:

• Prepare a Revit model for a seismic project and generate a corresponding Finite Element model.

• Conduct a seismic Response Spectrum Analysis (RSA) for this model.

• Perform designs and checks of structural elements for horizontal bracing (i.e. shear walls and building cores).

• Evaluate results of these seismic analyses and designs in the BIM model.

Before you start, please make sure you have the following software products installed: Revit Analysis + Design SSD installed.

If you have technical difficulties, please reach out to our SOFiSTiK Technical Support.

Let’s get started!

## Project Description¶

### Materials¶

Number

Material

Strength

1

concrete

C 30/37

2

concrete

C 40/50

3

concrete

C 30/37

4

reinforcement steel

B 500 B

### Cross Sections¶

Number

Materials

Name

Dimensions

1

2, 4

B/H = 40 / 40 cm

B/H = 40 / 40 cm

2

3, 4

B/H = 40 / 40 cm

B/H = 40 / 40 cm

3

3, 4

B/H = 30 / 30 cm

B/H = 30 / 30 cm

4

3, 4

Core: Tier 1

Outer dimensions = 680 / 430 cm

5

3, 4

Core: Tier 2

Outer dimensions = 690 / 440 cm

6

2, 4

Core: Tier 3 + 4

Outer dimensions = 690 / 440 cm

### Area Elements¶

Use

Materials

Thickness

Basement walls

3, 4

40 cm

Floor slabs - Basement

1, 4

35 cm

Floor slabs - Above ground

1, 4

20 cm

Core walls - Tier 3, 4

2, 4

40 cm

Core walls - Tier 2

3, 4

40 cm

Core walls - Tier 1

3, 4

30 cm

Shear wall - Tier 2, 3, 4

3, 4

40 cm

## Preparation of the model in Revit¶

### Storey Levels¶

Define which Revit levels you would like to use as SOFiSTiK Storey Level in the analysis.

### Shear Walls¶

Determine which structural walls of the Revit model are participating to the horizontal bracing of the structure and should be designed as shear walls.

### Building Cores and its Shear Walls¶

Add building cores to the model, linking shear walls groups across levels in a single analytical object.

Tip

It is possible to save results in the Revit Project via the Save as Package dialog. Supported results include:

• Forces from the building core elements

• Required reinforcement for the shear walls

Results stored in a Revit results package can be visualized in Show Results by changing the data base to the results package. For more info, see the respective SOFiSTiK Analysis + Design documentation.

Please note: Show Results does currently not support the result type reinforcement for shear walls.

## Analysis¶

Perform the response spectrum analysis by using the Earthquake RSA reloaded Task.

### Storey Checks¶

Proceed with the superpositioning and storey checks.

## Design¶

### Shear Wall Design¶

Perform the shear wall design with a Simplified Compression & Tension Method. The design is based on the integrated forces of the individual walls.

### Capacity Check¶

Conduct the capacity check for the building core. The check is based on the integrated forces of all walls associated with a core and its specific reinforcement layout.