- 摘 要
-
(1 湖南大學土木工程學院， 長沙 410082； 2 湖南省第二工程有限公司， 長沙 410015；3 湖南固特邦土木技術發(fā)展有限公司， 長沙 410082)
［摘要］為研究已震損的鋼筋混凝土框架結構的快速可恢復性，對7榀框架進行了預震損及快速加固修復，養(yǎng)護24h后進行低周反復荷載破壞試驗，并對比研究了灌漿料種類及鋼絲網層數對加固效果的影響。與未損框架結構進行骨架曲線、位移延性系數、剛度退化曲線及等效粘滯阻尼系數等參數的對比分析，計算結果表明，鋼絲網復合灌漿料修復對框架的承載力提高作用是有限的，但對抗震性能的提高作用效果明顯；兩種灌漿料加固均表現(xiàn)出良好的延性。試驗結果表明，采用環(huán)氧灌漿料不加鋼絲網的加固形式即可使加固框架滿足抗震需要，為震后建筑的快速修復提供了理論依據。
［關鍵詞］快速可恢復性；震損鋼筋混凝土框架；擬靜力試驗；鋼絲網復合灌漿料
中圖分類號：TU375-4 文獻標識碼：A文章編號：1002-848X(2021)15-0081-07
Study on seismic behavior of earthquake-damaged frame structures with rapid reversibility
HUANG Liang1, SUN Qiang1, DENG Peng1, ZHANG Mingliang2, SHAN Ren3, PENG Bo3
(1 College of Civil Engineering, Hunan University, Changsha 410082， China； 2 Hunan No.2 Engineering Co., Ltd., Changsha 410015， China； 3 Hunan Gutebang Civil Engineering Development Co., Ltd., Changsha 410082， China)
Abstract:In order to study the rapid recoverability of the earthquake-damaged reinforced concrete frame structure, 7 trusses of frames were preearthqake-damaged and quickly strengthened and repaired. After 24 hours maintenance, the low-cycle repeated load failure test was carried out, and the influence of grouting materials and steel mesh layers on the reinforcement effect was compared. By comparison with the skeleton curve, displacement ductility coefficient, stiffness degradation curve and equivalent viscous damping coefficient of the undamaged frame, it can be concluded that the repair of steel wire mesh composite grouting material has a limited effect on improving the bearing capacity of the frame, but a significant effect on improving the seismic behavior. Both grouting materials show good ductility. The experimental results show that the reinforced frame can meet the seismic needs by using epoxy grouting without wire mesh, which provides a theoretical basis for the rapid restoration of post-earthquake buildings.
Keywords:rapid reversibility； earthquake-damaged reinforced concrete frame； pseudo-static test； steel wire mesh composite grouting material
*國家自然科學基金青年項目（51908205）。
作者簡介：黃靚，博士，教授，博士生導師，Email:huangliangstudy@126.com。
