# Earthquake Analysis - Shear Walls¶

## Introduction¶

The following tutorial focuses on the SSD workflow for the analysis of shear walls within the scope of earthquake analysis.

The analysed structure is modelled in Revit 2020 and the finite element model is generated by using SOFiSTiK Analysis + Design for Revit 2020.

Shear walls are modelled with quad elements. Furthermore, design elements are assigned to the shear walls within the Revit model. They provide for a fully automatic interpolation and integration of quad internal forces for the corresponding shear walls` cross sections; thus, enabling a straight-forward assessment and further design on the basis of cross-sectional forces.

For more information about the definition of design elements in Revit 2020, please see the following tutorial: Generation of Design Elements for Shear Walls.

For additional infomation on the earthquake analysis with the Response Spectrum Analysis (RSA), please check the following tutorial: Earthquake Analysis with RSA.

## Project Description¶

Please see the following project information before setting up the project files. The modell is based on the example given in “Eurocode 8: Seismic Design of Buildings Worked examples” by Bisch et al, 2011.

### Materials¶

Number |
Material |
Strength |
---|---|---|

1 |
concrete |
C 25/30 |

3 |
reinforcement steel |
S 500 |

### Cross Sections¶

Number |
Element |
Dimension |
---|---|---|

1 |
Columns C7-C10 |
B/H = 50/50 cm |

2 |
Columns C12-C15 |
B/H = 40/70 cm |

3 |
T-Beam |
B/H/Bw/Hf = 195/50/25/18 cm |

4 |
T-Beam |
B/H/Bw/Hf = 220/50/25/18 cm |

5 |
Columns C1-C6, C11-C16 |
B/H = 30/70 cm |

6 |
Edge Beams |
B/H = 25/50 cm |

7 |
Walls W3, W4 (design element) |
B/H = 25/400 cm |

8 |
Wall N1B (design element) |
B/H = 25/168 cm |

9 |
Wall N1A (design element) |
B/H = 25/335 cm |

10 |
Wall N1C (design element) |
B/H = 25/168 cm |

11 |
Walls W1, W2 (design element) |
B/H = 30/400 cm |

### Geometry¶

### Loads¶

LC Number |
Title |
Loads |
---|---|---|

1 |
Self Weight |
automatic generation |

10 |
Additional dead load |
g1 = 2.00 kN/m² (100% mass active) |

30 |
Live Load |
q1 = 2,00 kN/m² (30% mass active) |

36 |
Roof live load |
q2 = 2,00 kN/m² (30% mass active) |

The following picture shows the load cases and load values defined on the structure.

For the Response Spectrum Analysis the following values will be used:

Response Spectrum according Eurocode |
Type 1 –> EC-1 |

Type of Spectrum |
Design Spectrum |

Acceleration |
Ag = 2.5 m/s² |

Soil Class |
B |

Behaviour factor |
3.0 |

## SSD Workflow - Earthquake analysis of Shear Walls¶

**Title:** SSD Workflow - Earthquake analysis of Shear Walls |
**Quality:** 1080p HD | **Captions:** English