Thursday, 14 July 2016

Fuzhou University Symposium and Seminar



Civil Engineering PhD candidate Mahmoud Sayed Ahmed, and undergraduate student, Ahmed Diab (who graduated in June 2016) received a Certificate of Appreciation from the Sustainable and Innovative Bridge Engineering Research Center at College of Civil Engineering, Fuzhou University recognizing their engagement with Fuzhou University graduate students in a Student Experience Seminar. The students also presented technical papers at the First International Symposium on Jointless and Sustainable Bridges at Fuzhou University, Province of Fujian, China, on May 12-14.

Source: Ryerson University. July 2016. IMPACT, Faculty of Engineering and Architectural Science, Toronto, ON, Canada.

Nonlinear Time-Dependent Behaviour of Concrete Insulated Panel

The insulated structural sandwich panel is a composite laminated structure, made of two stiff skin faces and lightweight thick core. The low-density low-shear rigidity laminated think core (foam, honeycomb) is structurally connected to the laminated skin faces by structural adhesive. The rigid skin (concrete, steel, wood) faces provide high bending stiffens for such lightweight structure, while the core resist the local buckling of the skin faces. The time-dependent deflection behaviour of the concrete insulated panel (CIP) varies with the change of the span-to-depth ratio for the instantaneous deflection, and the cyclic change of temperature and relative humidity over time. This paper discusses the nonlinear theoretical analysis for long-term creep deflection under sustained load that accounts for loads, time, temperature and relative humidity.




Citation:
Sayed-Ahmed, M. (June, 2013). Nonlinear Time-Dependent Behaviour of Concrete Insulated Panel. Concrete Research Letters, ISSN 2180-1371, Vol. 4, Issue 2, pp. 591-597.

BUILDING WITH BASE ISOLATION TECHNIQUES


Base isolation (BI) system for buildings is introduced to decouple the building structure from potentially damaging induced by earthquake motion, preventing the building superstructures from absorbing the earthquake energy. The mechanism of the base isolator increases the natural period of the overall structure, and decreases its acceleration response to earthquake / seismic motion. A steel building with structural rubber bearing is introduced throughout this study. The study analysis performed to check for the adequacy of the base isolation against building lateral drift and inter-story drift as per allowance in National Building Code of Canada 2010. Two buildings were analyzed using the nonlinear time history response analysis using the dynamic MODAL analysis for fixed base (FB) building, and Isolated base (IB) building with rubber bearing. The analysis represents a case study for symmetric steel building to show the ultimate capacity of the selected structural bearing, and to make a comparison for the difference between the isolated base and the fixed base buildings. Initial results show that the presence of the structural rubber bearing reduces significantly the vertical displacement, moment and shear generated for the same mode.

Keywords: building, base isolation, rubber bearing, earthquake, dynamics, time history response



Citation:
Sayed-ahmed, Mahmoud. Building with Base Isolation Techniques. Journal of Al-Azhar University Engineering Sector (JAUES), Vol. 7, No. 1, Dec. 2012, pp. 147-159.




Citation:
Sayed-Ahmed, M. 2012. Building with Base Isolation Techniques, Course Project Report. Ryerson University, Toronto, Canada.

Friday, 1 July 2016

ULTIMATE AND FATIGUE RESPONSES OF UHPFRC-FILLED, TRANSVERSE ANGLE-JOINT IN FULL-DEPTH, GFRP-REINFORCED, PRECAST BRIDGE DECK PANELS


Mahmoud Sayed-Ahmed, Khaled Sennah
Department of Civil Engineering, Ryerson University, Toronto, Ontario, Canada

IBC 16-78

KEYWORDS: Precast FDDP, GFRP, UHPFRC, Connections, Fatigue loading, Accelerated Bridge Construction.

ABSTRACT:

To accelerate bridge construction, precast full-depth deck panels (FDDPs) are placed over steel girders with transverse joints. In this paper, a transverse angle-joint is proposed with female shear key and bottom tongue. The joint has projecting glass fibre reinforced polymer (GFRP) bars from the precast panels and is filled with ultra-high performance fibre reinforced concrete (UHPFRC). Ultimate static, constant fatigue and variable fatigue load tests were performed under truck wheel footprint showed good results.

Sayed-Ahmed, M.; Sennah, K. (2016). Ultimate and Fatigue Response of UHPFRC-Filled, Transverse Angle-Joint in Full-Depth, GFRP-Reinforced, Precast Bridge Deck Panels. TRB: International Bridge Conference (IBC 2016), M.D., USA.


PUBLICATIONS

Mahmoud SAYED AHMED’s


PUBLICATIONS

 Journals

  1. Azimi, H.; Sennah, K.; Sayed-Ahmed, M.; Nikravan, N.; Louie, J.; Hassaan, A.; Al-Bayati. (October, 2014). Bridge Deck-Guardrail Anchorage Detailing for Sustainable Construction. ASCE Journal of Bridge Engineering, Vol.19, Issue 10, pp.
  2. Sayed-Ahmed, M. (June, 2013). Nonlinear Time-Dependent Behaviour of Concrete Insulated Panel. Concrete Research Letters, ISSN 2180-1371, Vol. 4, Issue 2, pp. 591-597.
  3. Sayed-Ahmed, M.: Sennah, K. (March, 2013). Finite Element and Modal Analysis of 3D Jointless Skewed RC Box Girder Bridge. Concrete Research Letters, ISSN 2180-1371, Vol. 4, Issue 1, pp. 557-568.
  4. Sayed-Ahmed, M. (Dec., 2012). Building with Base Isolation. Journal of Al-Azhar University Engineering Sector, JAUES, ISSN 1110-6409, Vol. 7, Issue 1, pp. 147-159.
  5. Sayed-Ahmed, M.; Helmy, N. (Dec., 2012). Engineering Public Policy for Eco-Friendly SIP Houses. Journal of Al-Azhar University Engineering Sector, JAUES, ISSN 1110-6409, Vol. 7, Issue 1, pp. 160-172.
  6. Sayed-Ahmed, M. (June, 2012). Statistical Modelling and Prediction of Compressive Strength of Concrete. Concrete Research Letters, ISSN: 2180-1371, Vol. 3, Issue 2, pp. 452-458.
  7. Shaaban, M. (Dec, 2010). Rockfall Bolting and Barrier Protection Systems.  Journal of Al-Azhar University Engineering Sector, JAUES, ISSN 1110-6409, Vol. 5, Issue 1, pp. 736-747.
  8. Sayed-Ahmed, M.; Shehata, E.; Sennah, K.  (2010). Development of Creep Model for Structural Insulated Timber-Foam Sandwich Walls under Sustained Soil Pressure in Basements of Residential Buildings. Journal of Al-Azhar University Engineering Sector, JAUES, ISSN 1110-6409, Vol. 5, Issue 1, pp. 603-614.


 Conferences

  1. Sayed-Ahmed, M.; Sennah, K. (2016). Ultimate and Fatigue Response of UHPFRC-Filled, Transverse Angle-Joint in Full-Depth, GFRP-Reinforced, Precast Bridge Deck Panels. TRB: International Bridge Conference (IBC 2016), M.D., USA.
  2. Sayed-Ahmed, M.; Sennah, K.; Monsif, M. Y. (2016). Mechanical Behaviour of Ultra-High Performance Reinforced Concrete Obtained with Different Concrete Constituents and Mix Designs. CSCE: 5th International Materials Specialty Conference, London, ON. 
  3. Sayed-Ahmed, M.; Sennah, K. (2016). Bond Strength of Ribbed-Surface High-Modulus Glass FRP Bars Embedded into Unconfined UHPFRC. CSCE: 5th International Structural Specialty Conference, London, ON.
  4. Sayed-Ahmed, M.; Sennah, K, Diab, A. and Mansour, S. (2016). Ultimate Flexural Strength and Long-Term Creep Deflection for Structural Insulated Foam-Timber Sandwich Panels. CSCE: 5th International Structural Specialty Conference, London, ON.
  5. Hamoda, A.; Sennah, K.; Hossain, K.; Shoukry, M.; Mahmoud, Z.; Sayed-Ahmed, M. (2016). Behaviour of Composite High-Performance Concrete Slab-on-Steel Girders Subjected to Hogging Moment. CSCE 2016 Annual General Conference, London, ON.
  6. Sayed-Ahmed, M.; Sennah, K. (2016). Fatigue Strength of Angle-Shaped Transverse Connection for GFRP-Reinforced Precast Full-Depth Deck Panels in Accelerated Bridge Construction. CSCE: 5th International Structural Specialty Conference, London, ON.
  7. Sayed-Ahmed, M.; Sennah, K. (2016). Applications of Prefabricated Bridge Elements and Connection Technology in Accelerating Integral Abutment Bridge Construction. The First International Symposium on Jointless  & Sustainable Bridges, Fuzhou University, Fujian, China.
  8. Sayed-Ahmed, M.; Sennah, K. (2016). Development of Ultra-High Performance Concrete Jointed Precast Decks and Concrete Piles in Integral Abutment Bridges. The First International Symposium on Jointless & Sustainable Bridges, Fuzhou University, Fujian, China.
  9. Sayed-Ahmed, M.; Sennah, K. (2015). Fatigue Resistance of GFRP-Reinforced Precast Full-Depth Deck Panel with Transverse Joints. IGSGE 14: The 14th International Conference on Structural & Geotechnical Engineering 2015, Sustainable infrastructure: From research to practice, New Cairo, Egypt, December 20-22, pp. 1-11.
  10. Sayed-Ahmed, M.; Sennah, K. (2015). Ultimate and fatigue strength of GFRP-reinforced, full-depth, precast bridge deck panels with zigzag-shape transverse joints filled with UHPFRC. CSCE 5th International / 11th Construction Specialty Conference (ICSC), Vancouver, BC, June 8-10.
  11. Sayed-Ahmed, M.; Sennah, K. (2015). Structural behavior of UHPFRC-filled, transverse C-Joint in full-depth, GFRP-reinforced, precast bridge deck panels resting over steel girders. CSCE 2015th Annual Conference/ 4th International Conference on Engineering Materials and Mechanics, Regina, SK, May 27-30.
  12. Lu, J.; Sennah, K.; Sayed-Ahmed, M.; Afefy, H. M. (2015). Development length of sand-coated glass fiber reinforced polymer bars with headed-end embedded in high-performance concrete. CSCE 2015th General Conference, Regina, SK, May 27-30.
  13. Sherif, M.; Sayed-Ahmed, M.; Sennah, K; Judieh, S. (2015). Development of Ultra-High Performance Concrete as a Closure Strip Filling Material in Prefabricated Bridge Applications. CSCE 2015th 4th International Conference on Engineering Materials and Mechanics, Regina, SK, May 27-30.
  14. Sayed-Ahmed, M.; Sennah, K. (2014). Development of transverse joints for full-depth precast deck panels incorporating ribbed-surface GFRP bars, HPC and UHPFRC. The 2014 PCI Convention and National Bridge Conference, National Harbour, MD, USA, September 6-9.
  15. Sayed-Ahmed, M.; Sennah, K. and Lai, D. (2014). Development of transverse joints for full-depth precast normal-strength concrete deck panels incorporating ribbed-surface GFRP bars and UHPFRC. CSCE 9th International Conference on Short and Medium Span Bridges (SMSB), Calgary, Alberta, July 15-18.
  16. Sayed-Ahmed, M.; Sennah, K. (2014). Pullout strength of sand-coated bars embedded in ultra-high performance fiber reinforced concrete. CSCE 2014th International Specialty Conference, Halifax, NS, May 28-31.
  17. Sayed-Ahmed, M.; Sennah, K. (2013). Effect of Temperature and Relative Humidity on Creep Deflection for Permanent Wood Foundation Panels. CSCE 3rd Specialty Conference on Material Engineering & Applied Mechanics, Montréal, Québec, May 29-Jun 1.
  18. Sayed-Ahmed, M.; Sennah, K. (2012). Flexural Creep Effects on Permanent Wood Foundation Made of Structural Insulated Foam-Timber Panels. CSCE 3rd International Structural Speciality Conference, Edmonton, June 6-9. ISBN: 978-1-894662-18-5, Vol. 3, pp. 1892-1901.
  19. Sennah, K.; Nikravan, N.; Louie, J.; Hassan, A.; Al-Bayati, N; El-Sayed-M; Sayed-Ahmed, M. (2011). Bridge Deck-guardrail Anchorage Detailing for Sustainable Construction. CDCC - The Fourth International Conference on Durability & Sustainability of Fibre Reinforced Polymer (FRP) Composite for Construction and Rehabilitation. Quebec City, June 20. ISBN: 978-2-7622-0196-3, pp. 337-334.



HONORS AND AWARDS

Mahmoud SAYED AHMED’s
HONORS AND AWARDS


  1. Certificate of Appreciation, The Sustainable and Innovative Bridge Engineering Research Center (SIBERC) & College of Engineering, Fuzhou University, China, May 2016.
  2. International Conference and Research Support Fund (ICRSF), Ryerson International (RI), April 2016.
  3. Ontario Graduate Scholarship (OGS 2015/2016), September 2015
  4. Ryerson Graduate Student Travel Award, Yeates School of Graduate Studies, Ryerson University, April 2015
  5. The DENNIS MOCK Student Leadership Award, Yeates School of Graduate Studies, Ryerson University, April 14, 2015
  6. RCI Foundation, USA. Convention College Sponsorship, March 2015
  7. International Conference and Research Support Fund (ICRSF), Ryerson International (RI), September 2014
  8. Transportation Association of Canada (TAC) Foundation Scholarship: by SNC-Lavalin, in celebration of TAC's centennial, August 2014
  9. NSERC GGSF Grad Travel Funding, Yeates School of Graduate Studies, Ryerson University, June 2014
  10. NORMAN ESCH Engineering Innovation and Entrepreneurship Award – II, November 2013
  11. Ontario Graduate Scholarship (OGS/Ryerson 2013/2014), September 2013
  12. Access to Opportunity Program (ATOP), September 2013
  13. Ryerson Graduate Student Travel Award, Yeates School of Graduate Studies, Ryerson University,  June 2013
  14. NORMAN ESCH Engineering Innovation and Entrepreneurship Award – I, July 2013
  15. Ryerson Graduate Scholarship (RGS), September 2012
  16. Access to Opportunity Program (ATOP), September 2012
  17. Ryerson Graduate Award (RGA), September 2011
  18. Access to Opportunity Program (ATOP), September 2011
  19. Ryerson Graduate Award (RGA), September 2010


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