SRA Poster_Guzman

The Role of Gravity Framing in the Seismic Performance of Steel Buildings: Visualization of 3D Deformation Data Ana D. Guzman Michael D. Engelhardt, PhD / Patricia M. Clayton, PhD Structural Engineering Department What is Gravity Framing? Motive for Research Methods and Materials Used Results Conclusion Acknowledgements References 2 nd Code: TrimData.m 3 rd Code: FinalMovieCode.m • In today’s world, many structures are built out of steel due to its strength. • During earthquakes, many buildings collapse and fatalities occur. • As of today, full knowledge and understanding of the connections’ performance when subjected to seismic (earthquake) loads is lacking. • A cyclic test that simulated seismic loads was performed in a large scale specimen. • LED markers were used to measure deformations of double angle connections. • Matlab codes were written to create a three dimensional movie of data gathered by an OptoTrack System. • Displays a three dimensional visual of the connections’ deformation. • Amplifies all deformations making them easier for the human eye to see and analyze. • Has the ability to display different subplots at once allowing the user to compare and contrast between test data. • Movie helps develop an understanding of connections’ response to seismic loads. • Facilitates the analysis of deformation data. • It is well organized and easy to understand. • The final movie display is an accurate representation of the actual test performed. • This project will help researchers and engineers have a better understanding and analysis of the connections’ deformations. • It will allow for an improvement in designs of steel structures. • It will be the foundation for further data analysis of the connections’ response to seismic loads such as displaying when, where, and under what load range connections start to fracture or completely fail. • Due to the way codes were written and with the user’s manual that was created for each one of them, they will be beneficial for data analysis of other tests performed in the structural laboratory. 1. CollapseofSteelBuildinginChile [Online Image]. Retrived July 28, 2015 from http ://www.salon.com/2010/02/27/c b_tale_of_two_earthquakes / 2. Engelhardt, M., Clayton, P., Helwig, T., Williamson, E. (2013). “NEESR Planning-The Role of Gravity Framing in the Seismic Performance of Steel Buildings,” Project Proposal submitted for NSF. 3. MATLAB, Released 2013b, The MathWorks, Inc., Natick, Massachusetts, United States. 4. Miramar College [Online Image]. Retrived July 28, 2015 from http://www.rmstructures.com / • Gravity connections between beams and columns in steel structures. • Designed only to support gravitational (vertical) loads. • Dead, Live, Snow Loads • Present throughout the structure in large amounts. • Proven to also help resist lateral loads. • Seismic and Wind loads • Reads and loads all Excel files containing data at a fast rate. • Saves all variables directly into the software in Matlab format. • Saves time to the user every time a code is run. 1 st Code: SaveAllFiles.m North Connection with LED Markers • Trims down data based on a specified percentage of deformation. • Only keeps timeframes where (x(n+1)-x(n))/max(dxo)>dp. • Only saves valuable data for the analysis of the connections’ deformation. Final Movie Display Original and Trimmed Data Building Collapse after earthquake hits Chile [1] Specimen Tested Gravitational Loads Gravitational Loads Lateral Loads Lateral Loads Building Frame of Miramar College [4] Contact at: [email protected] OptoTrack System

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Transcript of SRA Poster_Guzman

The Role of Gravity Framing in the Seismic Performance of Steel Buildings:

Visualization of 3D Deformation DataAna D. Guzman

Michael D. Engelhardt, PhD / Patricia M. Clayton, PhD Structural Engineering Department

What is Gravity Framing?

Motive for Research

Methods and Materials Used

Results

Conclusion

Acknowledgements

References

2nd Code: TrimData.m

3rd Code: FinalMovieCode.m

• In today’s world, many structures are built out of steel due to its strength.

• During earthquakes, many buildings collapse and fatalities occur.

• As of today, full knowledge and understanding of the connections’ performance when subjected to seismic (earthquake) loads is lacking.

• A cyclic test that simulated seismic loads was performed in a large scale specimen.

• LED markers were used to measure deformations of double angle connections.

• Matlab codes were written to create a three dimensional movie of data gathered by an OptoTrack System.

• Displays a three dimensional visual of the connections’ deformation.

• Amplifies all deformations making them easier for the human eye to see and analyze.

• Has the ability to display different subplots at once allowing the user to compare and contrast between test data.

• Movie helps develop an understanding of connections’ response to seismic loads.

• Facilitates the analysis of deformation data.

• It is well organized and easy to understand.

• The final movie display is an accurate representation of the actual test performed.

• This project will help researchers and engineers have a better understanding and analysis of the connections’ deformations.

• It will allow for an improvement in designs of steel structures.

• It will be the foundation for further data analysis of the connections’ response to seismic loads such as displaying when, where, and under what load range connections start to fracture or completely fail.

• Due to the way codes were written and with the user’s manual that was created for each one of them, they will be beneficial for data analysis of other tests performed in the structural laboratory.

1. CollapseofSteelBuildinginChile [Online Image]. Retrived July 28, 2015 from http://www.salon.com/2010/02/27/cb_tale_of_two_earthquakes/

2. Engelhardt, M., Clayton, P., Helwig, T., Williamson, E. (2013). “NEESR Planning-The Role of Gravity Framing in the Seismic Performance of Steel Buildings,” Project Proposal submitted for NSF.

3. MATLAB, Released 2013b, The MathWorks, Inc., Natick, Massachusetts, United States.

4. Miramar College [Online Image]. Retrived July 28, 2015 from http://www.rmstructures.com/

• Gravity connections between beams and columns in steel structures.

• Designed only to support gravitational (vertical) loads.

• Dead, Live, Snow Loads• Present throughout the structure in

large amounts.• Proven to also help resist lateral loads.

• Seismic and Wind loads

• Reads and loads all Excel files containing data at a fast rate.

• Saves all variables directly into the software in Matlabformat.

• Saves time to the user every time a code is run.

1st Code: SaveAllFiles.mNorth Connection with

LED Markers