注胶修复混凝土框架结构模型振动台试验
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摘要
以相似比为1∶4的双跨8层混凝土框架模型为试验对象,按照8度多遇(0.084g)、8度基本(0.24g)、8度罕遇(0.48g)以及8度半罕遇(0.612g)的顺序,分四个阶段对模型结构进行模拟地震试验,框架模型损坏后,对框架损伤区域的裂缝进行环氧树脂注胶修复,然后对框架模型输入与初次振动台试验相同的工况进行再次振动台试验,并比较混凝土框架模型在初次振动台试验、再次振动台试验中动力特性指标的变化特点,注胶修复前、后的不同水准地震作用下混凝土构件开裂、压碎等破坏形态以及模型结构层间刚度;将试验结果推算至原型,比较原型层间位移角等指标,以此评价注胶修复技术修复混凝土框架结构的有效性。试验结果表明,采用的环氧树脂注胶修复技术可以有效地修复震损后的混凝土框架结构。
A 1/4-scale two-bay eight-storey reinforced concrete frame was tested on shaking table.Initial shaking table tests were carried out through a set of real seismic excitations including four levels to investigate the seismic behavior of the reinforced concrete frame.Subsequently,the damaged frame was repaired using epoxy injection technique,and then subjected to the tests with the same input accelerograms selected for the original.This paper investigates experimentally the efficiency of the rehabilitation technique at repairing earthquake-damaged frame structures.Comparison of the responses between original and repaired frames was conducted.From the above discussion,the test results indicate that epoxy injection is considered an adequate method for repairing earthquake-damaged structures.
A 1/4-scale two-bay eight-storey reinforced concrete frame was tested on shaking table.Initial shaking table tests were carried out through a set of real seismic excitations including four levels to investigate the seismic behavior of the reinforced concrete frame.Subsequently,the damaged frame was repaired using epoxy injection technique,and then subjected to the tests with the same input accelerograms selected for the original.This paper investigates experimentally the efficiency of the rehabilitation technique at repairing earthquake-damaged frame structures.Comparison of the responses between original and repaired frames was conducted.From the above discussion,the test results indicate that epoxy injection is considered an adequate method for repairing earthquake-damaged structures.
引文
[1]张敏政.汶川地震中都江堰市的房屋震害[J].地震工程与工程振动,2008,28(6):1-6
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[4]唐波,余江滔,丁斌.钢筋混凝土框架节点震损加固方法的对比研究[J].土木建筑与环境工程,2010,32(S2):339-341
[5]王焕杰.外包钢套法加固混凝土框架节点抗震性能试验研究[D].上海:同济大学,2008
[6]Adin M A,Yanklevsky D Z,Farhey D N.Cyclic behaviorof epoxy-repaired reinforced concrete beam-column joints[J].ACI Structural Journal,1993,90(2):170-179
[7]Karayannis C G,Chalioris C E,Sideris K K.Effectivenessof RC beam-column connection repair using epoxy resininjections[J].Journal of Earthquake Engineering,1998,2(2):217-240
[8]Karayannis C G,Sirkelis G M.Strengthening and rehabilitationof RC beam-column joints using carbon-FRP jacketing andepoxy resin injection[J].Earthquake Engng Struct.Dyn.,2008(37):769-790
[9]Issa C A,Debs P.Experimental study of epoxy repairing ofcracks in concrete[J].Construction and BuildingMaterials,2007(21):157-163
[10]French C W,Thorp G A,Tsai W J.Epoxy repair techniquesfor moderate earthquake damage[J].ACI Structural Journal,1987(4):416-424
[2]王亚勇.汶川地震建筑震害启示:抗震概念设计[J].建筑结构学,2008,29(4):20-25
[3]余江滔,陆洲导,张克纯.震损钢筋混凝土框架节点修复后抗震性能试验研究[J].建筑结构学报,2010.12,31(12):64-73
[4]唐波,余江滔,丁斌.钢筋混凝土框架节点震损加固方法的对比研究[J].土木建筑与环境工程,2010,32(S2):339-341
[5]王焕杰.外包钢套法加固混凝土框架节点抗震性能试验研究[D].上海:同济大学,2008
[6]Adin M A,Yanklevsky D Z,Farhey D N.Cyclic behaviorof epoxy-repaired reinforced concrete beam-column joints[J].ACI Structural Journal,1993,90(2):170-179
[7]Karayannis C G,Chalioris C E,Sideris K K.Effectivenessof RC beam-column connection repair using epoxy resininjections[J].Journal of Earthquake Engineering,1998,2(2):217-240
[8]Karayannis C G,Sirkelis G M.Strengthening and rehabilitationof RC beam-column joints using carbon-FRP jacketing andepoxy resin injection[J].Earthquake Engng Struct.Dyn.,2008(37):769-790
[9]Issa C A,Debs P.Experimental study of epoxy repairing ofcracks in concrete[J].Construction and BuildingMaterials,2007(21):157-163
[10]French C W,Thorp G A,Tsai W J.Epoxy repair techniquesfor moderate earthquake damage[J].ACI Structural Journal,1987(4):416-424
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