CFRP Shear Strengthening of Reinforced-Concrete T-Beams with Corroded Shear Links
CFRP Shear Strengthening of Reinforced-Concrete T-Beams with Corroded Shear Links
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DOI：
10.1061/(asce)cc.1943-5614.0000548
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发表时间：
2015-10
影响因子：
4.6
通讯作者：
Shunde Qin;S. Dirar;Jian Yang;A. Chan;M. Elshafie
中科院分区：
文献类型：
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作者：
Shunde Qin;S. Dirar;Jian Yang;A. Chan;M. Elshafie
摘要本文研究了未腐蚀和腐蚀的钢筋混凝土T梁的结构性能，无论是外部粘结（EB）碳纤维增强聚合物（CFRP）片材或嵌入CFRP棒的剪切加固。对有效深度为295 mm、剪跨与有效深度比为3.05的RC T梁进行了9次试验。研究的参数是剪力杆腐蚀水平（未腐蚀，7%腐蚀，或12%腐蚀）和CFRP加固系统（EB CFRP板或嵌入式CFRP杆）的类型。未加固梁的剪力连接腐蚀水平为7和12%的剪切强度分别为11%和14%，小于未腐蚀的未加固梁的剪切强度。无论是嵌入式CFRP棒和EB CFRP片材是有效的，在提高受试梁的抗剪强度，但这两个加强系统的有效性降低增加剪力连接腐蚀水平。结果表明，CFRP筋的抗剪强度提高了10%，而CFRP筋的抗剪强度提高了10%。
AbstractThis paper investigates the structural behavior of uncorroded as well as corroded RC T-beams strengthened in shear with either externally bonded (EB) carbon fiber–reinforced polymer (CFRP) sheets or embedded CFRP rods. Nine tests were carried out on RC T-beams having an effective depth of 295 mm and a shear span to effective depth ratio of 3.05. The investigated parameters are the shear link corrosion level (uncorroded, 7% corroded, or 12% corroded) and type of CFRP strengthening system (EB CFRP sheets or embedded CFRP rods). The unstrengthened beams with shear link corrosion levels of 7 and 12% had shear strengths that were 11 and 14%, respectively, less than the shear strength of the uncorroded unstrengthened beam. Both the embedded CFRP rods and EB CFRP sheets were effective in enhancing the shear strength of tested beams but the effectiveness of both strengthening systems decreased with increasing shear link corrosion level. The shear strength enhancement provided by the embedded CFRP rods and...