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Proposal for design rules of axially loaded CFRP strengthened cold formed lipped channel steel sections
Abstract Carbon fiber reinforced polymer (CFRP) composites are considered to have high performance and potential for use in strengthening , retrofitting and for the rehabilitation of structural sections. In this paper, design procedures are proposed for the axial load capacity of cold formed steel lipped channel columns strengthened with carbon fiber reinforced polymer (CFRP). For the purpose of validation, the results are based on the proposed design equation from the North American specification for the design of cold-formed steel structural members (AISI-2007) and Euro code for cold-formed members and sheeting (EC3-EN1993-1-3:2006) are compared against the experimental test data. The test results showed that the capacity of the columns are close to the theoretical values predicted by the AISI-2007 and EC 3 provisions. Some tested specimens showed reduced capacity and premature failure due to peeling and debonding of the CFRP from the steel. Various experimental investigations are suggested for future work to further validate and update the design equations. From the experimental studies, it has been observed that there is significant increase in strength due to CFRP strengthening.
Highlights An analytical method to predict the strength for CFRP strengthened cold formed steel lipped channel columns. Proposed design equation from AISI-2007 and EC3-EN1993-1-3:2006 code specifications. The validity of the proposed design equations has been verified by comparing with the test results. The simplified expressions used in the proposed design was found to be in good agreement with the test data.
Proposal for design rules of axially loaded CFRP strengthened cold formed lipped channel steel sections
Abstract Carbon fiber reinforced polymer (CFRP) composites are considered to have high performance and potential for use in strengthening , retrofitting and for the rehabilitation of structural sections. In this paper, design procedures are proposed for the axial load capacity of cold formed steel lipped channel columns strengthened with carbon fiber reinforced polymer (CFRP). For the purpose of validation, the results are based on the proposed design equation from the North American specification for the design of cold-formed steel structural members (AISI-2007) and Euro code for cold-formed members and sheeting (EC3-EN1993-1-3:2006) are compared against the experimental test data. The test results showed that the capacity of the columns are close to the theoretical values predicted by the AISI-2007 and EC 3 provisions. Some tested specimens showed reduced capacity and premature failure due to peeling and debonding of the CFRP from the steel. Various experimental investigations are suggested for future work to further validate and update the design equations. From the experimental studies, it has been observed that there is significant increase in strength due to CFRP strengthening.
Highlights An analytical method to predict the strength for CFRP strengthened cold formed steel lipped channel columns. Proposed design equation from AISI-2007 and EC3-EN1993-1-3:2006 code specifications. The validity of the proposed design equations has been verified by comparing with the test results. The simplified expressions used in the proposed design was found to be in good agreement with the test data.
Proposal for design rules of axially loaded CFRP strengthened cold formed lipped channel steel sections
Kalavagunta, Sreedhar (author) / Naganathan, Sivakumar (author) / Bin Mustapha, Kamal Nasharuddin (author)
Thin-Walled Structures ; 72 ; 14-19
2013-06-10
6 pages
Article (Journal)
Electronic Resource
English
Axially loaded capacity of alternatively strengthened cold-formed channel columns with CFRP
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