Rectangular Reinforced Concrete Columns Strengthened with Carbon Fiber-Reinforced Polymer Sheets Using Corner Strip-Batten Method
The objective of this study is to investigate the effect of the recently developed corner strip-batten (CSB) technique on rectangular columns strengthened with carbon fiber-reinforced polymer (CFRP) sheets. In this technique, fiber-reinforced polymer (FRP) battens do not experience any curvature in...
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| description | The objective of this study is to investigate the effect of the recently developed corner strip-batten (CSB) technique on rectangular columns strengthened with carbon fiber-reinforced polymer (CFRP) sheets. In this technique, fiber-reinforced polymer (FRP) battens do not experience any curvature in confining the section, but are stretched as completely flat strips similar to flat coupons. For this purpose, 12 rectangular reinforced concrete (RC) columns, each with a cross section of 110 x 160 mm (4.33 x 6.30 in.) and a height of 500 mm (19.69 in.), were subjected to load eccentricities of 0, 30, 90, and 120 mm (0, 1.18, 3.54, and 4.72 in.). Results showed that the CSB technique improved the performance of rectangular specimens in terms of both axial strength and ductility. However, comparison of the results obtained in the authors' previous experimental study on square RC columns revealed that the improvement (that is, load-carrying capacity and ductility enhancement) gained with rectangular specimens was not as prominent as that obtained with square ones. Finally, comparison of the experimental axial load-bending moment (P-M) interaction diagrams for the strengthened columns and those obtained from the expressions suggested in such different codes as ACI 440.2R, fib Bulletin 14, and CNR-DT 200 R1, showed that the estimates of the codes were conservative when compared to experimental results. Keywords: batten; carbon fiber-reinforced polymer composites; corner strip; load eccentricity; P-M interaction diagram; rectangular reinforced concrete column. |
| doi_str_mv | 10.14359/51689566 |
| format | Article |
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In this technique, fiber-reinforced polymer (FRP) battens do not experience any curvature in confining the section, but are stretched as completely flat strips similar to flat coupons. For this purpose, 12 rectangular reinforced concrete (RC) columns, each with a cross section of 110 x 160 mm (4.33 x 6.30 in.) and a height of 500 mm (19.69 in.), were subjected to load eccentricities of 0, 30, 90, and 120 mm (0, 1.18, 3.54, and 4.72 in.). Results showed that the CSB technique improved the performance of rectangular specimens in terms of both axial strength and ductility. However, comparison of the results obtained in the authors' previous experimental study on square RC columns revealed that the improvement (that is, load-carrying capacity and ductility enhancement) gained with rectangular specimens was not as prominent as that obtained with square ones. Finally, comparison of the experimental axial load-bending moment (P-M) interaction diagrams for the strengthened columns and those obtained from the expressions suggested in such different codes as ACI 440.2R, fib Bulletin 14, and CNR-DT 200 R1, showed that the estimates of the codes were conservative when compared to experimental results. Keywords: batten; carbon fiber-reinforced polymer composites; corner strip; load eccentricity; P-M interaction diagram; rectangular reinforced concrete column.</description><identifier>ISSN: 0889-3241</identifier><identifier>EISSN: 1944-7361</identifier><identifier>DOI: 10.14359/51689566</identifier><language>eng</language><publisher>Farmington Hills: American Concrete Institute</publisher><subject>Axial loads ; Bearing strength ; Bending moments ; Carbon fiber reinforced concretes ; Carbon fiber reinforced plastics ; Carbon fiber reinforcement ; Carbon reinforced plastics ; Codes ; Concrete columns ; Ductility ; Fiber reinforced polymers ; Load ; Load carrying capacity ; Measurement ; Mechanical properties ; Reinforced concrete ; Sheets ; Strength (Materials) ; Stress concentration ; Strip ; Studies</subject><ispartof>ACI structural journal, 2017-05, Vol.114 (3), p.659</ispartof><rights>COPYRIGHT 2017 American Concrete Institute</rights><rights>Copyright American Concrete Institute May/Jun 2017</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,27901,27902</link.rule.ids></links><search><creatorcontrib>Saljoughian, Alireza</creatorcontrib><creatorcontrib>Mostofinejad, Davood</creatorcontrib><title>Rectangular Reinforced Concrete Columns Strengthened with Carbon Fiber-Reinforced Polymer Sheets Using Corner Strip-Batten Method</title><title>ACI structural journal</title><description>The objective of this study is to investigate the effect of the recently developed corner strip-batten (CSB) technique on rectangular columns strengthened with carbon fiber-reinforced polymer (CFRP) sheets. In this technique, fiber-reinforced polymer (FRP) battens do not experience any curvature in confining the section, but are stretched as completely flat strips similar to flat coupons. For this purpose, 12 rectangular reinforced concrete (RC) columns, each with a cross section of 110 x 160 mm (4.33 x 6.30 in.) and a height of 500 mm (19.69 in.), were subjected to load eccentricities of 0, 30, 90, and 120 mm (0, 1.18, 3.54, and 4.72 in.). Results showed that the CSB technique improved the performance of rectangular specimens in terms of both axial strength and ductility. However, comparison of the results obtained in the authors' previous experimental study on square RC columns revealed that the improvement (that is, load-carrying capacity and ductility enhancement) gained with rectangular specimens was not as prominent as that obtained with square ones. Finally, comparison of the experimental axial load-bending moment (P-M) interaction diagrams for the strengthened columns and those obtained from the expressions suggested in such different codes as ACI 440.2R, fib Bulletin 14, and CNR-DT 200 R1, showed that the estimates of the codes were conservative when compared to experimental results. Keywords: batten; carbon fiber-reinforced polymer composites; corner strip; load eccentricity; P-M interaction diagram; rectangular reinforced concrete column.</description><subject>Axial loads</subject><subject>Bearing strength</subject><subject>Bending moments</subject><subject>Carbon fiber reinforced concretes</subject><subject>Carbon fiber reinforced plastics</subject><subject>Carbon fiber reinforcement</subject><subject>Carbon reinforced plastics</subject><subject>Codes</subject><subject>Concrete columns</subject><subject>Ductility</subject><subject>Fiber reinforced polymers</subject><subject>Load</subject><subject>Load carrying capacity</subject><subject>Measurement</subject><subject>Mechanical properties</subject><subject>Reinforced concrete</subject><subject>Sheets</subject><subject>Strength (Materials)</subject><subject>Stress concentration</subject><subject>Strip</subject><subject>Studies</subject><issn>0889-3241</issn><issn>1944-7361</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><sourceid>8G5</sourceid><sourceid>BENPR</sourceid><sourceid>GUQSH</sourceid><sourceid>M2O</sourceid><recordid>eNpNj09LAzEQxYMoWKsHv0HA89Zkk2ySY12sChWlteeSZGf_lG22ZrOIR7-5W-pB5jDDm9-8xyB0S8mMcib0vaCZ0iLLztCEas4TyTJ6jiZEKZ2wlNNLdNX3O0IYSRmfoJ8VuGh8NbQm4BU0vuyCgwLnnXcBIoxDO-x9j9cxgK9iDX7cfjWxxrkJtvN40VgIyb_T96793kPA6xog9njTN74abYI_ajE0h-TBxAgev0Ksu-IaXZSm7eHmr0_RZvH4kT8ny7enl3y-TCoq0pgUvLDaEVVwnRkHzFAuS6NYUZaG2AKsJJalzCrOgUgtrZJOk5FSmgkhOJuiu5PvIXSfA_Rxu-uG4MfILVU6k4KkRI7U7ERVpoXt8acYjBurgH3jOg9lM-pzIZSkaUoZ-wVXqnHq</recordid><startdate>20170501</startdate><enddate>20170501</enddate><creator>Saljoughian, Alireza</creator><creator>Mostofinejad, Davood</creator><general>American Concrete Institute</general><scope>3V.</scope><scope>4T-</scope><scope>4U-</scope><scope>7QQ</scope><scope>7SR</scope><scope>7XB</scope><scope>88I</scope><scope>8BQ</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>8FK</scope><scope>8G5</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AEUYN</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>FR3</scope><scope>GNUQQ</scope><scope>GUQSH</scope><scope>HCIFZ</scope><scope>JG9</scope><scope>KR7</scope><scope>L6V</scope><scope>M2O</scope><scope>M2P</scope><scope>M7S</scope><scope>MBDVC</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>PTHSS</scope><scope>Q9U</scope></search><sort><creationdate>20170501</creationdate><title>Rectangular Reinforced Concrete Columns Strengthened with Carbon Fiber-Reinforced Polymer Sheets Using Corner Strip-Batten Method</title><author>Saljoughian, Alireza ; Mostofinejad, Davood</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-g152t-d4db9c08d496ace3a147fa83dffa0bdeb70b323b844e0797b87c90a1489355543</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2017</creationdate><topic>Axial loads</topic><topic>Bearing strength</topic><topic>Bending moments</topic><topic>Carbon fiber reinforced concretes</topic><topic>Carbon fiber reinforced plastics</topic><topic>Carbon fiber reinforcement</topic><topic>Carbon reinforced plastics</topic><topic>Codes</topic><topic>Concrete columns</topic><topic>Ductility</topic><topic>Fiber reinforced polymers</topic><topic>Load</topic><topic>Load carrying capacity</topic><topic>Measurement</topic><topic>Mechanical properties</topic><topic>Reinforced concrete</topic><topic>Sheets</topic><topic>Strength (Materials)</topic><topic>Stress concentration</topic><topic>Strip</topic><topic>Studies</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Saljoughian, Alireza</creatorcontrib><creatorcontrib>Mostofinejad, Davood</creatorcontrib><collection>ProQuest Central (Corporate)</collection><collection>Docstoc</collection><collection>University Readers</collection><collection>Ceramic Abstracts</collection><collection>Engineered Materials Abstracts</collection><collection>ProQuest Central (purchase pre-March 2016)</collection><collection>Science Database (Alumni Edition)</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>ProQuest Central (Alumni) (purchase pre-March 2016)</collection><collection>Research Library (Alumni Edition)</collection><collection>Materials Science & Engineering Collection</collection><collection>ProQuest Central (Alumni)</collection><collection>ProQuest One Sustainability</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central</collection><collection>Engineering Research Database</collection><collection>ProQuest Central Student</collection><collection>Research Library Prep (ProQuest)</collection><collection>SciTech Premium Collection</collection><collection>Materials Research Database</collection><collection>Civil Engineering Abstracts</collection><collection>ProQuest Engineering Collection</collection><collection>ProQuest research library</collection><collection>Science Database</collection><collection>Engineering Database</collection><collection>Research Library (Corporate)</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><collection>Engineering collection</collection><collection>ProQuest Central Basic</collection><jtitle>ACI structural journal</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Saljoughian, Alireza</au><au>Mostofinejad, Davood</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Rectangular Reinforced Concrete Columns Strengthened with Carbon Fiber-Reinforced Polymer Sheets Using Corner Strip-Batten Method</atitle><jtitle>ACI structural journal</jtitle><date>2017-05-01</date><risdate>2017</risdate><volume>114</volume><issue>3</issue><spage>659</spage><pages>659-</pages><issn>0889-3241</issn><eissn>1944-7361</eissn><abstract>The objective of this study is to investigate the effect of the recently developed corner strip-batten (CSB) technique on rectangular columns strengthened with carbon fiber-reinforced polymer (CFRP) sheets. In this technique, fiber-reinforced polymer (FRP) battens do not experience any curvature in confining the section, but are stretched as completely flat strips similar to flat coupons. For this purpose, 12 rectangular reinforced concrete (RC) columns, each with a cross section of 110 x 160 mm (4.33 x 6.30 in.) and a height of 500 mm (19.69 in.), were subjected to load eccentricities of 0, 30, 90, and 120 mm (0, 1.18, 3.54, and 4.72 in.). Results showed that the CSB technique improved the performance of rectangular specimens in terms of both axial strength and ductility. However, comparison of the results obtained in the authors' previous experimental study on square RC columns revealed that the improvement (that is, load-carrying capacity and ductility enhancement) gained with rectangular specimens was not as prominent as that obtained with square ones. Finally, comparison of the experimental axial load-bending moment (P-M) interaction diagrams for the strengthened columns and those obtained from the expressions suggested in such different codes as ACI 440.2R, fib Bulletin 14, and CNR-DT 200 R1, showed that the estimates of the codes were conservative when compared to experimental results. Keywords: batten; carbon fiber-reinforced polymer composites; corner strip; load eccentricity; P-M interaction diagram; rectangular reinforced concrete column.</abstract><cop>Farmington Hills</cop><pub>American Concrete Institute</pub><doi>10.14359/51689566</doi></addata></record> |
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| source | American Concrete Institute Online Journal Archives |
| subjects | Axial loads Bearing strength Bending moments Carbon fiber reinforced concretes Carbon fiber reinforced plastics Carbon fiber reinforcement Carbon reinforced plastics Codes Concrete columns Ductility Fiber reinforced polymers Load Load carrying capacity Measurement Mechanical properties Reinforced concrete Sheets Strength (Materials) Stress concentration Strip Studies |
| title | Rectangular Reinforced Concrete Columns Strengthened with Carbon Fiber-Reinforced Polymer Sheets Using Corner Strip-Batten Method |
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