Professor

Academic rank: Associate Professor
School of Civil and Environmental Engineering
Email: asrat.worku@aait.edu.et
Tel: +251 911 773055
Address: Addis Ababa Institute of Technology
King George VI St Addis Ababa 1000 Addis Ababa, Ethiopia.
Office number: 203

Research interest:

• Static and dynamic soil-structure interaction

• Development of subgrade/foundation models
• Development of analysis methods for raft and piled-raft foundations
• Laterally loaded piles

• Geotechnical earthquake engineering

• Earthquake ground motions: site effect, seismic hazard and code provisions
• Seismic soil-structure interaction


• Stability and stabilization of slopes
• Soil stabilization

PUBLICATIONS

JOURNAL ARTICLES
1. “Development of a Calibrated Pasternak Foundation Model for Practical Use,”International Journal of Geotechnical Engineering, Maney Publishing, UK, Vol. 8; No. 1, January 2014; pp. 26-33; DOI: http://dx.doi.org/10.1179/1938636213Z.00000000055

2. “Calibrated Analytical Formulas for Foundation Model Parameters,” International Journal of Geomechanics, American Society of Civil Engineers, Vol. 13, No. 4, August 2013,pp. 340-347 doi:http://dx.doi.org/10.1061/(ASCE)GM.1943-5622.0000214;

3. “An Analytical Solution Procedure for Dynamic Analysis of Soil-Structure Systems Subjected to Periodic Loading,” Electronic Journal of Geotechnical Engineering, Vol. 17 [2012], Bundle Z, pp. 3835-3852 (http://www.ejge.com/2012/Abs12.362.htm)

4. “The Status of Basic Ground Motion Provisions in Seismic Design Codes of Sub-Saharan African Countries,” Journal of the South African Institution of Civil Engineers,Vol. 56, No 1, April 2014, pp 40–53 (http://www.scielo.org.za/scielo.php?script=sci_arttext&pid=S1021-2019201... )

5. “Soil-structure-interaction provisions: a potential tool to consider for economical seismic design of buildings?” Journal of the South African Institution of Civil Engineers,Vol. 56, No 1, April 2014, pp 54–62 (http://www.scielo.org.za/scielo.php?pid=S1021-20192014000100006&script=s... )

6. Discussion of “Practical Subgrade Model for Improved Soil-Structure Interaction Analysis: Model Development,”by J.H. Horvath and R.J. Colasanti, International Journal of Geomechanics, American Society of Civil Engineers, Vol 13; No. 1, February 2013, pp. 97-99; (http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29GM.1943-5622.0000161 )

7. Discussion of “Practical Subgrade Model for Improved Soil-Structure Interaction Analysis: Software Implementation,” by R.J. Colasanti and J.H. Horvath, Practice Periodical on Structural Design and Construction, American Society of Civil Engineers, Vol 18; No. 2, April 2013, pp. 143–144 (http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29SC.1943-5576.0000120 )

8. “Seismic Soil-Structure-Interaction as a Potential Tool for Economical Seismic Design Of Building Structures,” Technical Note, Zede, Journal of the Ethiopian Engineers and Architects, Vol. 30, December 2013; pp 55 - 66 (http://www.ajol.info/index.php/zj/article/view/104354 )

9. "Recent Developments in the Definition of Design Earthquake Ground Motions Calling for a Revision of the Ethiopian Seismic Code - EBCS 8: 1995”Zede, Journal of the Ethiopian Engineers and Architects, Vol. 28, December 2011, pp. 1-15; (http://www.ajol.info/index.php/zj/article/view/77236 )

10. "Winkler's Single-Parameter Subgrade Model from the Perspective of an Improved Approach of Continuum-based Subgrade Modelling”Zede, Journal of the Ethiopian Engineers and Architects, Vol. 26, December 2009, pp. 11-21

11. "Proposed Higher Order Continuum-based Models for an Elastic Subgrade,"Zede, Journal of the Ethiopian Engineers and Architects, Vol. 26, December 2009, pp. 1-10

12. "A Parametric Study of the Influence of Short-term Soil Deformability on the Response of Building structures,"Zede, Journal of the Ethiopian Engineers and Architects, Vol. 25, December 2008, pp. 9-21 (With co-author Amsalu Gashaye)

13. "The Use of Springs in Static Analysis of Structures to Account for Short- and Long-term Subgrade Deformation," Zede, Journal of the Ethiopian Engineers and Architects, Vol. 24, December 2007, pp. 11-21

14. “A Closed-Form Solution Procedure to the Vibration of Non-classically Damped Systems Subjected to Harmonic Loads,”Zede, Journal of the Ethiopian Engineers and Architects, Vol. 22, December 2005

15. “Maximum Dry Density of Local granular Fills,”Zede, Journal of the Ethiopian Engineers and Architects, Vol. 21, December 2004, pp. 59 -70 (with co-author Daniel Shiferaw);

16. “Comparison of Seismic Provisions of EBCS 8 and Current Major Building Codes Pertinent to the Equivalent Static Force Analysis,”Zede, Journal of the Ethiopian Engineers and Architects, Vol. 18, December 2002, pp. 11-26

17. “Assessment of Important Seismic Provisions of EBCS 8 – 1995 from Structural Dynamics Perspective,” Zede, Journal of the Ethiopian Engineers and Architects, Vol. 17, December 2001, pp. 43-55.

18. "Seismic Analysis of Tower-Like Structures with Soil-Structure Interaction: An Approach Using Continuous Model," Proceedings of The International Conference on Earthquake Engineering, Amman, Jordan, October 1995.

19. "Seismic Analysis of Structures with Soil-Structure Interaction: An Approach Using Green's Influence Numbers," presented and published in the First Cairo Earthquake Engineering Symposium, Cairo, December 1994, pp. 295-317.

SPECIAL PUBLICATIONS: American Society of Civil Engineers (ASCE)
1. “Ground Response Analysis of Representative Sites of Hawassa City,” Geotechnical Earthquake Engineering and Soil Dynamics V (GEESD V), Geotechnical Special Publication (GSP No. 291), American Society of Civil Engineers, Austin, TX, USA, June 10-13, 2018, pp. 422-434https://ascelibrary.org/doi/abs/10.1061/9780784481462.041(With BesratEshetu, GetnetWassie and Genet H/Selassie)
2. “A Generalized Formulation of Continuum Models for Elastic Foundations,” GeoFlorida 2010: Advances in Analysis, Modelling and Design, Geotechnical Special Publication (GSP 199), American Society of Civil Engineers, February 2010, pp. 1641-1650; (http://ascelibrary.org/doi/abs/10.1061/41095%28365%29166); © 2010

3. “Application of Newly Derived and Calibrated Continuum Subgrade Models in the Analysis of Beams on Elastic Foundations,”GeoFlorida 2010: Advances in Analysis, Modelling and Design, Geotechnical Special Publication (GSP 199), American Society of Civil Engineers, February 2010, pp. 1651-1660; (With Yimer Degu)(http://ascelibrary.org/doi/abs/10.1061/41095%28365%29167); © 2010

BULLETIN ARTICLES
1. “Form as a Basic Consideration in the Design of Earthquake Resistant Buildings,” Journal of the Association of Ethiopian Architects, No. 2, October 1998.

2. "Importance of Soil Investigation in Civil Engineering Works," Bulletin, 20th Anniversary of the Ethiopian Construction Design Share Company, Addis Ababa, May 5, 2006

CONFERENCE PRESENTATIONS

1. “Seismic Design Aspects of Underground Structures,” Underground Structures and Deep Foundations Africa 2012, Organized by IQPC in collaboration with the South African Institute of Civil Engineers – Geotechnical Division, Pretoria, 18-19 September, 2012

2. "Justifications for Updating Input Ground Motion Provisions of the Ethiopian Building Code Standard (EBCS 8: 1995) for Seismic Design,” Symposium on Earthquake Engineering and Seismic Design, Ethiopian Association of Civil Engineers, January 14, 2012

3. “A Generalized Formulation of Continuum Models for Elastic Foundations,” GeoFlorida 2010: Advances in Analysis, Modeling and Design (GSP 199), American Society of Civil Engineers, February 2010, West Palm Beach, USA

4. “Application of Newly Derived and Calibrated Continuum Subgrade Models in the Analysis of Beams on Elastic Foundations,” GeoFlorida 2010: Advances in Analysis, Modeling and Design (GSP 199), American Society of Civil Engineers, February 2010, West Palm Beach USA

5. "A Generalization of Continuum Models for Elastic Foundations,"KiKo Workshop on Geotechnical Engineering 2010, Addis Ababa, September 06 - 09, 2010, Organized by Leibniz University - Hanover, Germany

6. "Future Seismic Hazard Maps for Ethiopia: PGA- vis-à-vis Response-spectra-based Maps,"50th Anniversary of the Geophysical Observatory, Addis Ababa University, November 2007

7. “Comparison of Some Seismic Provisions of EBCS 8 with Current International Codes,” First International Conference on Civil Engineering, January 2003, organized by the Ethiopian Civil Engineers Association

8. "Importance of Public Awareness in Earthquake Prone Areas,” Third Symposium of the Ethiopian Association of Seismology and Earthquake Engineering, May 1998

9. "Influence of Soil-Structure Interaction on the Response of Structures to Earthquake Ground Motion,” Second Symposium of the Ethiopian Association of Seismology and Earthquake Engineering, April 1997