Experimental Investigation of Uniaxial Compressive Behavior of Composite Columns without and with Full and Partial CFRP Wraps
AbstractConcrete columns are the backbone of any major structure, and their strengthening, repair, and retrofit have always drawn special research attention. One of the techniques for strengthening and improving the ductility of concrete columns has been the application of carbon fiber–reinforced po...
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description | AbstractConcrete columns are the backbone of any major structure, and their strengthening, repair, and retrofit have always drawn special research attention. One of the techniques for strengthening and improving the ductility of concrete columns has been the application of carbon fiber–reinforced polymer (CFRP) materials. A total of 43 columns of different configurations were experimentally investigated to evaluate the uniaxial compressive behavior of composite columns. Experimental and international code–recommended load-carrying capacities, stress–strain relations, axial stiffness, ductility factor, and failure modes were examined in the study. When fully wrapped, the strength of both plain cement concrete and reinforced cement concrete columns improved by 21% each with reference to the unwrapped columns. In addition to providing the advantages of external confinement to the columns, full wrapping contributed to a strength increment of 21%, which compared well with the steel reinforcement contribution to a strength increment of 28% to 39%. The partial wrapping technique was found to be an economical alternative to the full wrapping technique, with strength enhancements of 6% to 12% in the case of both plain cement concrete and reinforced cement concrete partially wrapped columns. Two regression models for the load-carrying capacity for columns with and without wraps were developed with four key performance parameters: percentage steel reinforcement, percentage concrete, percentage carbon fiber–reinforced polymer wrap, and the weight of the specimen. The formulated models were validated and found to be robust and consistent with the results. |
doi_str_mv | 10.1061/PPSCFX.SCENG-1399 |
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One of the techniques for strengthening and improving the ductility of concrete columns has been the application of carbon fiber–reinforced polymer (CFRP) materials. A total of 43 columns of different configurations were experimentally investigated to evaluate the uniaxial compressive behavior of composite columns. Experimental and international code–recommended load-carrying capacities, stress–strain relations, axial stiffness, ductility factor, and failure modes were examined in the study. When fully wrapped, the strength of both plain cement concrete and reinforced cement concrete columns improved by 21% each with reference to the unwrapped columns. In addition to providing the advantages of external confinement to the columns, full wrapping contributed to a strength increment of 21%, which compared well with the steel reinforcement contribution to a strength increment of 28% to 39%. The partial wrapping technique was found to be an economical alternative to the full wrapping technique, with strength enhancements of 6% to 12% in the case of both plain cement concrete and reinforced cement concrete partially wrapped columns. Two regression models for the load-carrying capacity for columns with and without wraps were developed with four key performance parameters: percentage steel reinforcement, percentage concrete, percentage carbon fiber–reinforced polymer wrap, and the weight of the specimen. 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One of the techniques for strengthening and improving the ductility of concrete columns has been the application of carbon fiber–reinforced polymer (CFRP) materials. A total of 43 columns of different configurations were experimentally investigated to evaluate the uniaxial compressive behavior of composite columns. Experimental and international code–recommended load-carrying capacities, stress–strain relations, axial stiffness, ductility factor, and failure modes were examined in the study. When fully wrapped, the strength of both plain cement concrete and reinforced cement concrete columns improved by 21% each with reference to the unwrapped columns. In addition to providing the advantages of external confinement to the columns, full wrapping contributed to a strength increment of 21%, which compared well with the steel reinforcement contribution to a strength increment of 28% to 39%. The partial wrapping technique was found to be an economical alternative to the full wrapping technique, with strength enhancements of 6% to 12% in the case of both plain cement concrete and reinforced cement concrete partially wrapped columns. Two regression models for the load-carrying capacity for columns with and without wraps were developed with four key performance parameters: percentage steel reinforcement, percentage concrete, percentage carbon fiber–reinforced polymer wrap, and the weight of the specimen. The formulated models were validated and found to be robust and consistent with the results.</description><subject>Axial stress</subject><subject>Bearing strength</subject><subject>Carbon fiber reinforced concretes</subject><subject>Carbon fiber reinforced plastics</subject><subject>Carbon fibers</subject><subject>Cement</subject><subject>Cement reinforcements</subject><subject>Composite columns</subject><subject>Compressive properties</subject><subject>Concrete columns</subject><subject>Ductility</subject><subject>Failure modes</subject><subject>Load carrying capacity</subject><subject>Polymers</subject><subject>Regression models</subject><subject>Reinforced cements</subject><subject>Reinforcing steels</subject><subject>Retrofitting</subject><subject>Strengthening</subject><subject>Stress-strain relationships</subject><subject>Technical Papers</subject><issn>1084-0680</issn><issn>1943-5576</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2024</creationdate><recordtype>article</recordtype><recordid>eNp1kM1OwzAQhC0EEqXwANwicU5Zx87fEaK2VKogolRwi9zEoa7SONhOKQfeHSdB4sTJY-_MWPshdI1hgiHAt2m6SmZvk1UyfZy7mMTxCRrhmBLX98Pg1GqIqAtBBOfoQusdAKYhBCP0PT02XIk9rw2rnEV94NqId2aErB1ZOutasKOwk0TuG8W1Fgfu3PMtOwipOkP3LrUw3Kqq3dfa-RRmK1vjsLrotTNrq6q_pUyZvmv2nDqvijX6Ep2VrNL86vcco_Vs-pI8uMun-SK5W7qM4Mi4GwZ-QYqwxJzGm5J41Pc5xyTkJPQw8YDyjR_kXuRDVAD2cxYQwDmUBS1oDBEZo5uht1Hyo7UrZjvZqtp-mVkjBRLQkFoXHly5klorXmaNJcPUV4Yh6yhnA-Wsp5x1lG1mMmSYzvlf6_-BHxtpgJE</recordid><startdate>20240801</startdate><enddate>20240801</enddate><creator>Sudhir, M R</creator><creator>Beulah, M</creator><general>American Society of Civil Engineers</general><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>FR3</scope><scope>KR7</scope><orcidid>https://orcid.org/0000-0002-2741-3329</orcidid></search><sort><creationdate>20240801</creationdate><title>Experimental Investigation of Uniaxial Compressive Behavior of Composite Columns without and with Full and Partial CFRP Wraps</title><author>Sudhir, M R ; Beulah, M</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a318t-ba05d3d7f1e49bf32455ee137e37213204eb56c28508d015ca6301c0fd4d49083</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2024</creationdate><topic>Axial stress</topic><topic>Bearing strength</topic><topic>Carbon fiber reinforced concretes</topic><topic>Carbon fiber reinforced plastics</topic><topic>Carbon fibers</topic><topic>Cement</topic><topic>Cement reinforcements</topic><topic>Composite columns</topic><topic>Compressive properties</topic><topic>Concrete columns</topic><topic>Ductility</topic><topic>Failure modes</topic><topic>Load carrying capacity</topic><topic>Polymers</topic><topic>Regression models</topic><topic>Reinforced cements</topic><topic>Reinforcing steels</topic><topic>Retrofitting</topic><topic>Strengthening</topic><topic>Stress-strain relationships</topic><topic>Technical Papers</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Sudhir, M R</creatorcontrib><creatorcontrib>Beulah, M</creatorcontrib><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Civil Engineering Abstracts</collection><jtitle>Practice periodical on structural design and construction</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Sudhir, M R</au><au>Beulah, M</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Experimental Investigation of Uniaxial Compressive Behavior of Composite Columns without and with Full and Partial CFRP Wraps</atitle><jtitle>Practice periodical on structural design and construction</jtitle><date>2024-08-01</date><risdate>2024</risdate><volume>29</volume><issue>3</issue><issn>1084-0680</issn><eissn>1943-5576</eissn><abstract>AbstractConcrete columns are the backbone of any major structure, and their strengthening, repair, and retrofit have always drawn special research attention. One of the techniques for strengthening and improving the ductility of concrete columns has been the application of carbon fiber–reinforced polymer (CFRP) materials. A total of 43 columns of different configurations were experimentally investigated to evaluate the uniaxial compressive behavior of composite columns. Experimental and international code–recommended load-carrying capacities, stress–strain relations, axial stiffness, ductility factor, and failure modes were examined in the study. When fully wrapped, the strength of both plain cement concrete and reinforced cement concrete columns improved by 21% each with reference to the unwrapped columns. In addition to providing the advantages of external confinement to the columns, full wrapping contributed to a strength increment of 21%, which compared well with the steel reinforcement contribution to a strength increment of 28% to 39%. The partial wrapping technique was found to be an economical alternative to the full wrapping technique, with strength enhancements of 6% to 12% in the case of both plain cement concrete and reinforced cement concrete partially wrapped columns. Two regression models for the load-carrying capacity for columns with and without wraps were developed with four key performance parameters: percentage steel reinforcement, percentage concrete, percentage carbon fiber–reinforced polymer wrap, and the weight of the specimen. The formulated models were validated and found to be robust and consistent with the results.</abstract><cop>New York</cop><pub>American Society of Civil Engineers</pub><doi>10.1061/PPSCFX.SCENG-1399</doi><orcidid>https://orcid.org/0000-0002-2741-3329</orcidid></addata></record> |
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subjects | Axial stress Bearing strength Carbon fiber reinforced concretes Carbon fiber reinforced plastics Carbon fibers Cement Cement reinforcements Composite columns Compressive properties Concrete columns Ductility Failure modes Load carrying capacity Polymers Regression models Reinforced cements Reinforcing steels Retrofitting Strengthening Stress-strain relationships Technical Papers |
title | Experimental Investigation of Uniaxial Compressive Behavior of Composite Columns without and with Full and Partial CFRP Wraps |
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