2013 Session: 300

• Limit Analysis for Historic Masonry Bridge with CFRP Reinforcements
  Abstract: This paper deals with the collapse behavior of a historical masonry arch bridge subject to combined seismic loads, by means of the limit analysis and shakedown theorems. A finite element modal analysis and seismic load evaluation was performed building a program code. The assessment of the collapse loads and shakedown multiplier, consisting of corresponding nonlinear constrained optimization problems, were analyzed using lower bound theorems of the limit analysis and shakedown theory, respectively. Because the retrofitting of this structure cannot be performed in the intrados surface, the application of CFRP strips on the extrados of the arch is a useful and valuable technique, as shown by a significant increase of the limit and shakedown multipliers.
  Authors: Gesualdo, Antonio; Catalani, Giulio
  Authors: Gesualdo, Antonio; Catalani, Giulio
  Year: 2013
  Document Type: Paper
  Subject: Bridges and Other Structures; Design; Materials
  Session: 300
  Paper Number: 13-1658
• PERFORMANCE OF FRP CONCRETE BEAMS EXPOSED TO SEVERE ENVIRONMENTS
  Abstract: The use of various forms of fiber reinforced polymers (FRP) has been on the increase in numerous construction applications. This includes internal reinforcement of Portland cement concrete by rods as well as strengthening concrete elements by laminates. However, there is little work conducted on concrete involving various combinations of FRP composites. Also, there is a need to better understand the behavior of FRP systems in concrete elements subjected to chemicals and to external heat. This study aims at investigating the flexural strength rendered by FRP rods and FRP external laminates mounted on concrete beams. Sets of beams were made with reinforcing steel, FRP rods and FRP laminates and were subjected to 3, 6 and 9 week cycles in fresh water, sea water and 20% magnesium sulphate as well as 6-hour exposure to temperatures of 80 and 150 0C. The flexural load was assessed for all beams prior to and after exposure cycles. The results of this work reveal that FRP smooth rods did not provide the anticipated reinforcement effect, likely due to a lack of bonding. The FRP laminates, however, contributed to a large increase in flexural strength particularly when used in conjunction with steel reinforcement. Sea water and 150 0C temperature caused the largest loss in flexural strength. It is recommended to use protective mortar layers to alleviate heat-induced loss of flexural strength. For future work, other sets of materials, FRP combination as well as exposure schemes need to be evaluated.
  Authors: Abou-Zeid, Mohamed Nagib; Agaiby, Michael G.; El-Deeb, Tarek; El-Said, Sherif; Georgy, Fadi; Zaki, Amr
  Authors: Abou-Zeid, Mohamed Nagib; Agaiby, Michael G.; El-Deeb, Tarek; El-Said, Sherif; Georgy, Fadi; Zaki, Amr
  Year: 2013
  Document Type: Paper
  Subject: Bridges and Other Structures; Design; Materials
  Session: 300
  Paper Number: 13-1833
• Limit Analysis for Historic Masonry Bridge with CFRP Reinforcements
  Authors: Catalani, Giulio
  Authors: Catalani, Giulio
  Year: 2013
  Document Type: Presentation
  Subject: Bridges and Other Structures; Design; Materials
  Session: 300
  Paper Number: 13-1658
• PERFORMANCE OF FRP CONCRETE BEAMS EXPOSED TO SEVERE ENVIRONMENTS
  Authors: Zaki, Amr
  Authors: Zaki, Amr
  Year: 2013
  Document Type: Presentation
  Subject: Bridges and Other Structures; Design; Materials
  Session: 300
  Paper Number: 13-1833
• Hybrid FRP-Concrete-Steel Double-Skin Tubular Columns: Recent Research Advances
  Authors: Teng, Jin-Guang
  Authors: Teng, Jin-Guang
  Year: 2013
  Document Type: Presentation
  Subject: Bridges and Other Structures; Design; Materials
  Session: 300
  Paper Number: P13-5757
• DECID2: A Smart Composite Platform With Double Structural Health Monitoring Sensors
  Authors: Habti, Monssef
  Authors: Habti, Monssef
  Year: 2013
  Document Type: Presentation
  Subject: Bridges and Other Structures; Design; Materials
  Session: 300
  Paper Number: P13-6933
• CatStrong CRP-X3 - A Novel Approach for Concrete Bridge Repair
  Authors: Harik, Issam
  Authors: Harik, Issam
  Year: 2013
  Document Type: Presentation
  Subject: Bridges and Other Structures; Design; Materials
  Session: 300
  Paper Number: P13-6934
• Intermediate Crack-Induced Debonding in Reinforced-Concrete Beams Externally Strengthened with Prestresed FRP Plates or Sheets
  Authors: Dai, Jian-Guo
  Authors: Dai, Jian-Guo
  Year: 2013
  Document Type: Presentation
  Subject: Bridges and Other Structures; Design; Materials
  Session: 300
  Paper Number: P13-6273