超声波检测混凝土构件循环荷载下的损伤
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摘要
为由现场测试获得震后混凝土建筑物的损伤状况,利用超声波对构件检测,根据其声学参数的变化来获取构件损伤信息。对混凝土扁柱和短肢剪力墙共三个混凝土构件的拟静力试验,通过全过程的超声波声学参数的测量,获得了该工况下波速、波幅随加载力、位移变化情况,并依此获得声学参数损伤系数与构件损伤系数的关系。研究表明,随着损伤的增大,波速和波幅有不同程度的降低;波幅比波速能更好地反应构件的损伤;波幅的损伤系数与构件的损伤系数近似成直线关系。
Ultrasonic was used in this paper to evaluate the damage of the concrete members after earthquake.A flat column and two short shear walls were tested under cyclic load.And the acoustical parameters of three concrete members were collected during the tests.The variation of wave velocity and amplitude were studied.The relationship of the acoustical parametres and the damage coefficient were discussed according to the test results.The research indicates that wave velocity and amplitude descended as the growing of force and displacement;and the amplitude was more sensitive to the damage than the wave velocity.The test also shows damage coefficient of amplitude was approximately linear with its own damage coefficient.
Ultrasonic was used in this paper to evaluate the damage of the concrete members after earthquake.A flat column and two short shear walls were tested under cyclic load.And the acoustical parameters of three concrete members were collected during the tests.The variation of wave velocity and amplitude were studied.The relationship of the acoustical parametres and the damage coefficient were discussed according to the test results.The research indicates that wave velocity and amplitude descended as the growing of force and displacement;and the amplitude was more sensitive to the damage than the wave velocity.The test also shows damage coefficient of amplitude was approximately linear with its own damage coefficient.
引文
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[11]Park Y J,Ang A H-S,Wen Y K.Seismic damage a-nalysis of reinforced concrete buildings[J].Journalof Structural Engineering,ASCE,1985,111(ST4):740-757.
[12]Park Y J,Ang A H-S,Wen Y K.Damage-limiting aseismic design of buildings[J].Earthquake Spectra,1987,3(1):1-26.
[2]赵杰林.混凝土结构地震损伤的研究现状及发展趋向[J].四川建筑科学研究,2007,33(6):138-142.Zhao Jielin.Present situation and development ofstudies on earthquake damage in concrete structures[J].Sichuan Building Science,2007,33(6):138-142.(in Chinese)
[3]Komlos K,Popovics S,Nurnbergerova T,et al.Ul-trasonic pulse velocity test of concrete properties asspecified in various standards[J].Cement and Con-crete Composites,1996,16(5):357-364.
[4]Qasrawi Hisham Y,Marie Iqbal A.The use of US-PV to anticipate failure in concrete under compression[J].Cement and Concrete Research,2003,33(12):2017-2021.
[5]Suaris Wimal,Fernando Viraj.Ultrasonic pulse at-tenuation as a measure of damage growth during cyclicloading of concrete[J].ACI Materials Journal,1987,84(30):185-193.
[6]Nogueira,Carnot L,Willam Kaspar J.Ultrasonic tes-ting of damage in concrete under uniaxial compression[J].ACI Materials Journal,2001,98(3):265-275.
[7]Selleck Scott F,Landis Eric N,Peterson Michael L,et al.Ultrasonic investigation of concrete with distrib-uted damage[J].1998,95(1):27-36.
[8]王怀亮,宋玉普.不同尺寸混凝土试件受压状态下超声波传播特性研究[J].大连理工大学学报,2007,47(1):90-94.Wang Huailiang,Song Yupu.Ultrasonic pulses be-havior in various-size concrete specimens under com-pression[J].Journal of Dalian University of Technol-ogy,2007,47(1):90-94.(in Chinese)
[9]Banon H,Biggs J M,Irvine H M.Seismic damage inreinforced concrete frames[J].Journal of StructuralEngineering,ASCE,1981,107(9):1713-1729.
[10]Park Y J,Ang A H-S.Mechanistic seismic damagemodel for reinforced concrete[J].Journal of Structur-al Engineering,ASCE,1985,111(ST4):722-739.
[11]Park Y J,Ang A H-S,Wen Y K.Seismic damage a-nalysis of reinforced concrete buildings[J].Journalof Structural Engineering,ASCE,1985,111(ST4):740-757.
[12]Park Y J,Ang A H-S,Wen Y K.Damage-limiting aseismic design of buildings[J].Earthquake Spectra,1987,3(1):1-26.
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