Shear Strengthening of Pile Cap Girders Using Carbon Fiber Reinforced Polymer (CFRP) Strips
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Bibliografische Angaben
| Autor(en): |
William Shekarchi
(The University of Texas at Austin, Austin, TX, USA)
James O. Jirsa (The University of Texas at Austin, Austin, TX, USA) Wassim Ghannoum (The University of Texas at San Antonio, San Antonio, TX, USA) |
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| Medium: | Tagungsbeitrag | ||||
| Sprache(n): | Englisch | ||||
| Tagung: | IABSE Symposium: Engineering the Future, Vancouver, Canada, 21-23 September 2017 | ||||
| Veröffentlicht in: | IABSE Symposium Vancouver 2017 | ||||
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| Seite(n): | 2106-2112 | ||||
| Anzahl der Seiten (im PDF): | 7 | ||||
| Jahr: | 2017 | ||||
| DOI: | 10.2749/vancouver.2017.2106 | ||||
| Abstrakt: |
Five large-scale reinforced concrete (RC) pile cap girders were tested to investigate the feasibility of strengthening wide-webbed RC members in shear using Carbon Fiber Reinforced Polymer (CFRP) strips that wrapped around the girder and U-wrap strips with CFRP anchors. CFRP strips were applied to uncracked and pre-cracked 813 mm deep by 813 mm wide pile cap girders to determine the shear performance of strengthened members. The test results indicated that the CFRP anchors developed the fracture strength of the CFRP strips even though some anchors were placed in tension zones. The CFRP shear strengthening improved the shear capacity of the pile cap girders by as much as 56%. Strengthening uncracked and pre-cracked specimens resulted in comparable peak shear capacities. However, the pre-existing shear crack caused the average CFRP fracture strain to be lower than in the uncracked girder. |
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