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Title: | Flexural Response of CFRP Prestressed Highway Bridge Box-Beams |
Authors: | Singh, Shamsher Bahadur |
Keywords: | Civil Engineering CFRP Prestressed Concrete Box Highway Bridges |
Issue Date: | Feb-2004 |
Publisher: | Precast/Prestressed Concrete Institute |
Abstract: | This paper presents an experimental and analytical investigation of the flexural response of box beams reinforced and prestressed using carbon fiber reinforced polymer (CFRP) tendons. Two one-third scale box beams were prestressed using seven bonded pretensioning tendons and six unbonded post-tensioning tendons. A third beam was prestressed with seven bonded pretensioning tendons and six non-prestressed unbonded posttensioning tendons. Beams were reinforced with carbon fiber composite cable stirrups and tested to failure. A computer program was developed to predict deflection, strain, and post-tensioning forces at various loads. A parametric analysis examined the effects of the level of pretensioning and post-tensioning forces on the overall flexural response. Results showed that the beam prestressed using both pretensioning and unbonded post-tensioning tendons had a 26 percent higher ultimate load capacity and 36 percent lower energy ratio than the beam with non-prestressed unbonded post-tensioning tendons. Levels of initial pretensioning and posttensioning forces significantly affect the flexural response and beam failure mode. |
URI: | https://www.pci.org/PCI/Publications/PCI_Journal/Issues/2004/January-February/Flexural_Response_of_CFRP_Prestressed_Concrete_Box_Beams_for_Highway_Bridges.aspx http://dspace.bits-pilani.ac.in:8080/xmlui/handle/123456789/3887 |
Appears in Collections: | Department of Civil Engineering |
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