Dynamic analysis of a residential building using ETABS

Published on 16 Apr 2022. Written by Nidhi Tiwari

Natural disasters are one of the greatest tragedies that mankind has to face in the present era. Though there have been many types of research that are going on in this field and many measures have been adopted to prevent the losses caused by various natural disasters that befall humanity, no permanent solutions have been found for the problem. Moreover, with increasing urbanization, increasing pollution and deforestation, the threat of such disasters has increased manifolds. Natural calamities like earthquakes, tsunamis, floods, etc. continue to cause large scale losses to humankind both in terms of life and property.

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With the advancement in technology, many preventive measures have been adopted like prior detection, proper rescue, and relief, etc. However, when earthquakes are concerned, no proper prevention is yet in existence. It is still not possible to predict an earthquake. The tragedy comes for a few seconds without warning and results in huge destruction. Prevention and control of earthquakes is a global concern. Many types of research have been done in this regard. Efforts are made to construct buildings that are resistant to earthquake damage.

However, this task of designing resistant buildings is challenging work. With increasing population, multi-story buildings have become popular and when the height of the building increases, the loads on the buildings increases due to dominant lateral loading. This load has to overcome besides keeping in mind the strength, stability and comfort factors of the building. Thus, almost every designer faces the problem of designing a building with proper strength and stability against lateral loads such as wind loads, earthquake loads, etc.

Dynamic Analysis of different buildings can show the effect of various forces acting on the building and how the building will respond if the loads are changed.

In this ETABS project, the effect of lateral loads on various parameters such as moments, axial forces, shear force, base shear, maximum story drift, and tensile forces has to be studied and analyzed.

Project implementation:

1. The design of the building has to prepared in accordance with IS: 1893-2002 which contains the recommendations for earthquake resistance design of the structures. In the designing process, you have to decide the type of the building, which in this case will be a residential building, number of storeys, shape of the building, number of staircases in the building, number of lifts, types of walls, geometric details, floor to floor height, material details, type of constructions, etc.

2. Once the 3D plan of the building is done, the 3D model of the building has to be prepared using the ETABS software.
3. After the model is prepared, you need to carry out the dynamic analysis of the building. There are numerous methods of carrying out a dynamic analysis of any building. These methods are:

• Equivalent Static Analysis
• Linear Dynamic Analysis
• Response Spectrum Method
• Time History Analysis
• Pushover Analysis
• Non-Linear Static Analysis
• Non-Linear Dynamic Analysis

4. For the analysis of the building, the loads acting on the buildings hold the utmost importance. The various common loads acting on a multi-storeyed building include:

• Dead loads
• Live loads
• Gravity loads
• Wind loads
• Earthquake loads

5. The building model is analyzed by changing the values of the different loads acting on the building and noting the effects. The analysis is done using the Time History method or Response Spectrum Method.

The analysis was done for various parameters like story drift, story shear, time period, etc.

The analysis of buildings in different zones can be done and the results can be compared.

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Conclusion:

On analyzing different residential buildings in different zones and comparing the results, you need to find the conditions in which the structure is most stable.

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Kit required to develop Dynamic analysis of a residential building using ETABS:

• No kit

Technologies you will learn by working on Dynamic analysis of a residential building using ETABS:

• ETABS
• Civil Engineering

Any Questions?