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Shear strengthening of RC T-section beams with low strength concrete using NSM CFRP laminates
The effectiveness of NSM technique with CFRP laminates for the shear strengthening of T-section RC beams of low strength concrete was assessed. Five NSM shear strengthening configurations (three CFRP orientations and two levels of CFRP percentage) were applied in RC beams with a steel stirrups perce...
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Published in: | Cement & concrete composites 2011-02, Vol.33 (2), p.334-345 |
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creator | Dias, S.J.E. Barros, J.A.O. |
description | The effectiveness of NSM technique with CFRP laminates for the shear strengthening of T-section RC beams of low strength concrete was assessed. Five NSM shear strengthening configurations (three CFRP orientations and two levels of CFRP percentage) were applied in RC beams with a steel stirrups percentage of 0.10% and of 0.17%. The results showed that: NSM technique is still effective in beams of low strength concrete; inclined are more effective than vertical laminates; the beam’s shear resistance increases with the CFRP percentage; the NSM strengthening effectiveness decreases with the increase of the steel stirrups percentage. Using available experimental results obtained with the same test set-up but using beams of higher strength concrete it can be concluded that the NSM technique is less effective for lower concrete strengths. In general, the formulation proposed by Nanni et al. provided safe and acceptable estimates for the contribution of the NSM shear strengthening systems. The predicted values of the CFRP contribution for the shear resistance were 75% of the results registered experimentally. |
doi_str_mv | 10.1016/j.cemconcomp.2010.10.002 |
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Five NSM shear strengthening configurations (three CFRP orientations and two levels of CFRP percentage) were applied in RC beams with a steel stirrups percentage of 0.10% and of 0.17%. The results showed that: NSM technique is still effective in beams of low strength concrete; inclined are more effective than vertical laminates; the beam’s shear resistance increases with the CFRP percentage; the NSM strengthening effectiveness decreases with the increase of the steel stirrups percentage. Using available experimental results obtained with the same test set-up but using beams of higher strength concrete it can be concluded that the NSM technique is less effective for lower concrete strengths. In general, the formulation proposed by Nanni et al. provided safe and acceptable estimates for the contribution of the NSM shear strengthening systems. 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Five NSM shear strengthening configurations (three CFRP orientations and two levels of CFRP percentage) were applied in RC beams with a steel stirrups percentage of 0.10% and of 0.17%. The results showed that: NSM technique is still effective in beams of low strength concrete; inclined are more effective than vertical laminates; the beam’s shear resistance increases with the CFRP percentage; the NSM strengthening effectiveness decreases with the increase of the steel stirrups percentage. Using available experimental results obtained with the same test set-up but using beams of higher strength concrete it can be concluded that the NSM technique is less effective for lower concrete strengths. In general, the formulation proposed by Nanni et al. provided safe and acceptable estimates for the contribution of the NSM shear strengthening systems. The predicted values of the CFRP contribution for the shear resistance were 75% of the results registered experimentally.</description><subject>Beams (structural)</subject><subject>Carbon fiber reinforced plastics</subject><subject>CFRP laminates</subject><subject>Concretes</subject><subject>Laminates</subject><subject>Low strength concrete</subject><subject>NSM</subject><subject>Reinforced concrete</subject><subject>Reinforcing steels</subject><subject>Shear</subject><subject>Shear strengthening</subject><subject>Strength</subject><subject>Strengthening</subject><subject>T cross section RC beams</subject><issn>0958-9465</issn><issn>1873-393X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2011</creationdate><recordtype>article</recordtype><recordid>eNqFkMtOwzAQRS0EEqXwD97BJmUcJ3GyhIqXVB5qi8QGWY4zaV0lcbFTKv6ehCLYwcIayXPu2HMIoQxGDFhyvhpprLVttK3XoxC-rkcA4R4ZsFTwgGf8ZZ8MIIvTIIuS-JAceb8CgCQS4YC8zpaoHPWtw2bRLrExzYLakk7HdB541K2xDc1R1Z5uTbukld3-wLR_1mGLdOP72MPsno6vp0-0UrVpVIv-mByUqvJ48l2H5Pn6aj6-DSaPN3fji0mgI87bIMQiKxh2f0SRJXmac86hjPqTsKzUUV5CjkIpSJgAUJqFnKlcMZWlpQDOh-R0N3ft7NsGfStr4zVWlWrQbrxM41iwbl_oyLM_SZYIFqYiiqMOTXeodtZ7h6VcO1Mr9yEZyN69XMlf97J333c69130chfFbul3g056bbDRWBjXOZWFNf8P-QQBJ5IA</recordid><startdate>201102</startdate><enddate>201102</enddate><creator>Dias, S.J.E.</creator><creator>Barros, J.A.O.</creator><general>Elsevier Ltd</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7QQ</scope><scope>7SR</scope><scope>8FD</scope><scope>FR3</scope><scope>JG9</scope><scope>KR7</scope><scope>7UA</scope><scope>C1K</scope><scope>F1W</scope><scope>H96</scope><scope>L.G</scope></search><sort><creationdate>201102</creationdate><title>Shear strengthening of RC T-section beams with low strength concrete using NSM CFRP laminates</title><author>Dias, S.J.E. ; Barros, J.A.O.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c433t-2ed9d1e095e796b8b3330f430f4619fc4bf0be7aa061700ac1231aba1a98f7033</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2011</creationdate><topic>Beams (structural)</topic><topic>Carbon fiber reinforced plastics</topic><topic>CFRP laminates</topic><topic>Concretes</topic><topic>Laminates</topic><topic>Low strength concrete</topic><topic>NSM</topic><topic>Reinforced concrete</topic><topic>Reinforcing steels</topic><topic>Shear</topic><topic>Shear strengthening</topic><topic>Strength</topic><topic>Strengthening</topic><topic>T cross section RC beams</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Dias, S.J.E.</creatorcontrib><creatorcontrib>Barros, J.A.O.</creatorcontrib><collection>CrossRef</collection><collection>Ceramic Abstracts</collection><collection>Engineered Materials Abstracts</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Materials Research Database</collection><collection>Civil Engineering Abstracts</collection><collection>Water Resources Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><jtitle>Cement & concrete composites</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Dias, S.J.E.</au><au>Barros, J.A.O.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Shear strengthening of RC T-section beams with low strength concrete using NSM CFRP laminates</atitle><jtitle>Cement & concrete composites</jtitle><date>2011-02</date><risdate>2011</risdate><volume>33</volume><issue>2</issue><spage>334</spage><epage>345</epage><pages>334-345</pages><issn>0958-9465</issn><eissn>1873-393X</eissn><abstract>The effectiveness of NSM technique with CFRP laminates for the shear strengthening of T-section RC beams of low strength concrete was assessed. Five NSM shear strengthening configurations (three CFRP orientations and two levels of CFRP percentage) were applied in RC beams with a steel stirrups percentage of 0.10% and of 0.17%. The results showed that: NSM technique is still effective in beams of low strength concrete; inclined are more effective than vertical laminates; the beam’s shear resistance increases with the CFRP percentage; the NSM strengthening effectiveness decreases with the increase of the steel stirrups percentage. Using available experimental results obtained with the same test set-up but using beams of higher strength concrete it can be concluded that the NSM technique is less effective for lower concrete strengths. In general, the formulation proposed by Nanni et al. provided safe and acceptable estimates for the contribution of the NSM shear strengthening systems. 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source | ScienceDirect Freedom Collection 2022-2024 |
subjects | Beams (structural) Carbon fiber reinforced plastics CFRP laminates Concretes Laminates Low strength concrete NSM Reinforced concrete Reinforcing steels Shear Shear strengthening Strength Strengthening T cross section RC beams |
title | Shear strengthening of RC T-section beams with low strength concrete using NSM CFRP laminates |
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