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（蘭州理工大學(xué)土木工程學(xué)院， 蘭州 730050）

［摘要］對(duì)14根圓截面木梁先進(jìn)行靜載破壞試驗(yàn)以模擬實(shí)際工程受損狀態(tài)。然后針對(duì)木梁受損的特點(diǎn)，分別用玄武巖纖維布采用不同方法加固后再進(jìn)行靜載試驗(yàn)，對(duì)木梁自身極限承載力、延性等性能進(jìn)行了加固前后的對(duì)比分析。分析結(jié)果表明，玄武巖纖維布粘貼加固技術(shù)適合于已損木結(jié)構(gòu)，對(duì)改善木梁的承載能力、延性及剛度都有貢獻(xiàn)。在保證粘貼質(zhì)量的前提下，加固效果與對(duì)受損特征的認(rèn)知、玄武巖纖維布的層數(shù)、縱環(huán)向的配合等影響因素有關(guān)。當(dāng)受損特征認(rèn)知清楚、縱環(huán)向配合得當(dāng)、玄武巖纖維布粘貼層數(shù)增加時(shí)，其加固效果隨之增加。

［關(guān)鍵詞］木結(jié)構(gòu)； 圓截面； 梁； 加固； 試驗(yàn)； 玄武巖纖維布

中圖分類號(hào)：TU366-2文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2016)15-0114-05

Flexural behavior experimental study on damaged circular cross section timber beam strengthened by BFRP sheets

Song Yu, Chen Wanwei

(College of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050, China)

Abstract:Static load damaged tests on 14 circular cross section timber beams were carried out to simulate the damage status in practical projects. Then according to the different damage characteristics of timber beams, different strengthening methods with Basalt Fiber Reinforced Plastics (BFRP) sheets were carried out on timber beams before static load tests. The performances of the timber beams including the ultimate bearing capacity and ductility before and after strengthening were compared and analyzed. The analysis results show that the BFRP sheet paste strengthening technology is suitable for the damaged timber structure and makes contribution to the bearing capacity, ductility and stiffness of the timber beams. Under the premise of ensuring the quality of paste, the strengthening quality is influenced by factors as the damage characteristics cognition, the layer of BFRP sheets and cooperation of longitudinal paste with hoop paste. The strengthening effect can be improved in circumstances that the damage characteristics is clear recognized, the layer of BFRP sheets is increased and that cooperation of longitudinal paste with hoop paste is perfect.

Keywords:timber structure; circular cross section; beam; strengthen; experiment; Basalt Fiber Reinforced Plastics (BFRP) sheet

作者簡(jiǎn)介：宋彧，教授，Email：songy@lut.cn。