- 摘 要
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(1 河北省建筑科學研究院有限公司， 石家莊 050227； 2 河北省建筑工程質量檢測中心有限公司，石家莊 050227； 3 河北省固廢建材化利用科學與技術重點實驗室， 石家莊 050227)
摘要: 我國有大量的混凝土結構，在其服役期間由于結構老化、使用功能改變、荷載增加等原因，不可避免地會出現(xiàn)各種損傷，造成安全隱患。 拆除重建會造成巨大經濟投入和環(huán)境污染，因此有必要進行加固處理以提高結構安全性。 目前針對鋼筋混凝土結構加固的研究大部分是在構件未損傷的情況下進行加固的試驗和分析，對損傷混凝土梁的加固研究尚不完善。 因此，制作了 9 根尺寸相同的鋼筋混凝土試驗梁，按初始荷載大小分為四種損傷程度，研究粘貼鋼板或碳纖維布加固受損混凝土梁的效果。 研究發(fā)現(xiàn)，粘貼鋼板或碳纖維布能夠提高受損混凝土梁的極限承載力和剛度，粘貼鋼板加固的受損混凝土梁極限承載力相對粘貼前提高了 37. 69% ~ 42. 56%，粘貼碳纖維布加固的受損混凝土梁極限承載力相對粘貼前提高了 21. 96% ~ 40. 62%，在混凝土梁損傷嚴重情況下粘貼鋼板加固更有效；不同損傷程度對粘貼鋼板加固效果影響不大，對粘貼碳纖維加固效果影響顯著。
關鍵詞: 鋼板； 碳纖維布； 鋼筋混凝土梁； 損傷程度； 加固
中圖分類號:TU317 文獻標志碼:A 文章編號:1002￣848X(2022)06￣0081￣04
DOI:10. 19701 / j.jzjg.LS210141
Comparative test study on the effect of bonding steel plate or carbon fiber cloth to strengthendamaged concrete beams
CHU Shaohui1，2，3， FU Shifeng1，3
(1 Hebei Academy of Building Research Co.， Ltd.， Shijiazhuang 050227， China； 2 Hebei Construction EngineeringQuality Testing Center Co.， Ltd.， Shijiazhuang 050227， China； 3 Hebei Provincial Key Laboratory of Scienceand Technology for the Utilization of Solid Waste and Building Materials， Shijiazhuang 050227， China)
Abstract:There are a large number of concrete structures in our country， various damages will inevitably occur during theirservice period， which will cause safety hazards， due to structural aging， functional changes， load increase， etc..Demolitionand reconstruction will cause huge economic investment and environmental pollution， so it is necessary to strengthen thestructure to improve the safety of the structure. At present， most of the researches on the reinforcement of reinforcedconcrete structures are experiments and analysis of reinforcement without damage to the members， and the research on thereinforcement of damaged concrete beams is not perfect. Therefore， nine reinforced concrete beams of the same size wereproduced for the test， and they were divided into four degrees of damage according to the initial load size to study the effectof bonding steel plate or carbon fiber cloth to strengthen damaged concrete beams. The study found that the ultimate bearingcapacity and stiffness of damaged concrete beams can be increasedby bonding steel plate or carbon fiber cloth，the ultimatebearing capacity of damaged concrete beams reinforced with steel plateis increased by 37. 69% ~ 42. 56%， while theultimate bearing capacity of damaged concrete beams reinforced with carbon fiber cloth is increased by 21. 96% ~ 40. 62%.It is more effective to bond steel plate reinforcement when the concrete beam is severely damaged. Different degrees ofdamage have little influence on the effect of bonding steel plate， but have significant influence on the effect of bondingcarbon fiber cloth.
Keywords:steel plate； carbon fiber cloth； reinforced concrete beam； damage degree； reinforcement
∗國家重點研發(fā)計劃:災害條件下重大交通基礎設施網絡的快速評估、修復與搶通技術及其裝備(2016YFC0802207)。
第一作者:褚少輝，碩士，高級工程師，主要從事建筑結構檢測、鑒定，改造設計與加固研究，Email: 718602316@ qq.com。
[引用本文] 褚少輝，付士峰. 粘貼鋼板或碳纖維布加固受損混凝土梁效果對比試驗研究[ J]. 建筑結構，2022，52(6):81￣84. CHU Shaohui， FU Shifeng. Comparative test study on the effect of bonding steel plate or carbon fiber cloth tostrengthen damaged concrete beams[J]. Building Structure，2022，52(6):81￣84.
