氯鹽環(huán)境作用下玄武巖纖維布加固鋼筋混凝土梁抗彎性能試驗(yàn)研究*
王海良,孫煒,楊新磊
- 摘 要
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（天津城建大學(xué)土木工程學(xué)院, 天津 300384）［摘要］通過(guò)開(kāi)展不同層數(shù)玄武巖纖維布加固既有損傷鋼筋混凝土梁在不同濃度NaCl溶液環(huán)境下的抗彎性能試驗(yàn)，重點(diǎn)研究不同NaCl溶液濃度以及粘貼纖維布層數(shù)對(duì)加固梁裂縫的開(kāi)展、豎向撓度、鋼筋應(yīng)變、纖維布應(yīng)變和極限承載力的影響。試驗(yàn)結(jié)果表明：采用玄武巖纖維布加固后，鋼筋混凝土梁裂縫的開(kāi)展受到了限制，極限承載力得到了顯著提高；隨著粘貼纖維布層數(shù)的增加，梁極限承載力逐步提高；隨著NaCl溶液濃度增高，梁極限承載力提高的幅度會(huì)削弱，但仍具有較為可靠的加固效果。［關(guān)鍵詞］玄武巖纖維布; 既有損傷鋼筋混凝土梁; NaCl溶液; 加固層數(shù)中圖分類號(hào)：TU375.1 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：1002-848X(2015)09-0086-04Experimental research on flexural behavior of reinforced concrete beams strengthened by basalt fiber cloth in chlorine salt environmentWang Hailiang, Sun Wei, Yang Xinlei(School of Civil Engineering, Tianjin Chengjian University, Tianjin 300384, China)Abstract:Through flexural behavior experiments of damaged reinforced concrete beams strengthened by basalt fiber cloth with different layers in different concentration of NaCl solution environment, effects of concentration of NaCl solution and pasting fiber cloth layer on the cracking development, vertical deflection, steel rebar, fiber cloth limit strain and ultimate bearing capacity of the strengthened beams were studied. The test results show that with reinforcement by basalt fiber cloth, cracking development of reinforced concrete beams is limited and the ultimate bearing capacity is evidently improved. With the increase of the fiber cloth layers, ultimate bearing capacity of the beam gradually increases. With the increase of concentration of NaCl solution, the development range of ultimate bearing capacity is weakened, but still has reliable strengthening effect.Keywords: basalt fiber cloth; damaged reinforced concrete beam; NaCl solution; strengthening layer*天津市自然科學(xué)基金重點(diǎn)項(xiàng)目（12JCZDJC28900）, 天津市科技興海項(xiàng)目（KJXH2012-19）。作者簡(jiǎn)介：王海良，教授，碩士生導(dǎo)師，Email:wanghailiang6601@126.com。參考文獻(xiàn)［1］宋立元.海洋鋼筋混凝土結(jié)構(gòu)氯離子腐蝕耐久性研究［D］.大連:大連理工大學(xué), 2009.［2］王海良，王博，楊新磊, 等. 酸、堿、氯鹽對(duì)玄武巖纖維布加固鋼筋混凝土梁抗彎性能的影響［J］. 建筑結(jié)構(gòu)，2015，45（9）：81-85.［3］仇新剛,馬孝軒,孫秀武.鋼筋混凝土在濱海鹽土地區(qū)腐蝕規(guī)律試驗(yàn)研究 ［J］. 建筑科學(xué),2001,17(6):41-43.［4］張建.海洋環(huán)境下CFRP及CFRP-混凝土截面性能的耐久性研究［D］.大連:大連理工大學(xué),2013.
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