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elaboration, can exhibit internal defects that cannot be visualized, being usually air voids. In this work, the detection of internal damage in CFST samples elaborated with a percentage of contained air voids in concrete, was carried out by performing a complete ultrasound scan using an immersion tank. The analysis of the ultrasound signals shows the differences presented in the amplitude of the fundamental frequency of the signal, and in the Broadband Ultrasound Attenuation (BUA), in comparison with a sample without defects. The main contribution of this study is the application of the BUA technique in CFST samples for the location of air voids. The results present a linear relationship between BUA averages over the window of the CFSTs and the percentage of air voids contained (Pearson\u2019s correlation coefficient r = 0.9873), the higher percentage of air voids, the higher values of BUA. The BUA algorithm could be applied effectively to distinguish areas with defects inside the CFSTs. Similar to the BUA results, the analysis in the frequency domain using the FFT and the STFT was sensitive in the detection of internal damage (Pearson\u2019s correlation coefficient r = \u22120.9799, and r = \u22120.9672, respectively). The results establish an improvement in the evaluation of CFST elements for the detection of internal defects.<\/jats:p>","DOI":"10.3390\/s22124400","type":"journal-article","created":{"date-parts":[[2022,6,13]],"date-time":"2022-06-13T02:01:44Z","timestamp":1655085704000},"page":"4400","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":21,"title":["Damage Detection Using Ultrasonic Techniques in Concrete-Filled Steel Tubes (CFSTs) Columns"],"prefix":"10.3390","volume":"22","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-8506-5166","authenticated-orcid":false,"given":"Antonio","family":"Callejas","sequence":"first","affiliation":[{"name":"Department of Structural Mechanics, University of Granada, 18071 Granada, Spain"},{"name":"Instituto de Investigaci\u00f3n Biosanitaria, ibs.GRANADA, 18012 Granada, Spain"},{"name":"Excellence Research Unit \u201cModelingNature\u201d (MNat), 18071 Granada, Spain"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5941-0894","authenticated-orcid":false,"given":"Roberto","family":"Palma","sequence":"additional","affiliation":[{"name":"Department of Structural Mechanics, University of Granada, 18071 Granada, Spain"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3728-513X","authenticated-orcid":false,"given":"David","family":"Hern\u00e1ndez-Figueirido","sequence":"additional","affiliation":[{"name":"Department of Mechanical Engineering and Construction, Universitat Jaume I, 12071 Castell\u00f3n de la Plana, Spain"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9239-294X","authenticated-orcid":false,"given":"Guillermo","family":"Rus","sequence":"additional","affiliation":[{"name":"Department of Structural Mechanics, University of Granada, 18071 Granada, Spain"},{"name":"Instituto de Investigaci\u00f3n Biosanitaria, ibs.GRANADA, 18012 Granada, Spain"},{"name":"Excellence Research Unit \u201cModelingNature\u201d (MNat), 18071 Granada, Spain"}]}],"member":"1968","published-online":{"date-parts":[[2022,6,10]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"211","DOI":"10.1016\/j.jcsr.2014.04.016","article-title":"Developments and advanced applications of concrete-filled steel tubular (CFST) structures: Members","volume":"100","author":"Han","year":"2014","journal-title":"J. Constr. Steel Res."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"1544","DOI":"10.1016\/j.tws.2009.05.006","article-title":"Analysis and design of concrete-filled stiffened thin-walled steel tubular columns under axial compression","volume":"47","author":"Tao","year":"2009","journal-title":"Thin Walled Struct."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"301","DOI":"10.1016\/j.enbuild.2016.03.015","article-title":"Design model for analysis of relationships among CO2 emissions, cost, and structural parameters in green building construction with composite columns","volume":"118","author":"Oh","year":"2016","journal-title":"Energy Build."},{"key":"ref_4","unstructured":"Figueirido, D.H. (2012). Estudio Experimental del Pandeo de Perfiles Tubulares Rectangulares de Acero, Rellenos de Hormig\u00f3n de Alta Resistencia, Bajo Carga Axial y Diagrama de Momentos Variables. [Ph.D. Thesis, Universitat Polit\u00e8cnica de Val\u00e8ncia]."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"105930","DOI":"10.1016\/j.jcsr.2020.105930","article-title":"Flexural performance of square concrete-filled steel tube beams stiffened with V-shaped grooves","volume":"166","author":"Badaruzzaman","year":"2020","journal-title":"J. Constr. Steel Res."},{"key":"ref_6","first-page":"123","article-title":"Flexural performance of cold-formed square CFST beams strengthened with internal stiffeners","volume":"34","author":"Badaruzzaman","year":"2020","journal-title":"Steel Compos. Struct. Int. J."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"104679","DOI":"10.1016\/j.jobe.2022.104679","article-title":"Seismic performance of CFST column to steel beam joint with outer annular stiffener","volume":"54","author":"Xu","year":"2022","journal-title":"J. Build. Eng."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"235","DOI":"10.3390\/cmd3020014","article-title":"Early Detection of Corrosion-Induced Concrete Micro-cracking by Using Nonlinear Ultrasonic Techniques: Possible Influence of Mass Transport Processes","volume":"3","author":"Climent","year":"2022","journal-title":"Corros. Mater. Degrad."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"122915","DOI":"10.1016\/j.conbuildmat.2021.122915","article-title":"Detecting cracks due to steel corrosion in reinforced cement mortar using intermodulation generation of ultrasonic waves","volume":"286","author":"Eiras","year":"2021","journal-title":"Constr. Build. Mater."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"57","DOI":"10.1016\/j.tws.2013.04.012","article-title":"Behaviour of CFST stub columns with initial concrete imperfection: Analysis and calculations","volume":"70","author":"Liao","year":"2013","journal-title":"Thin Walled Struct."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"1922","DOI":"10.1016\/j.jcsr.2011.06.009","article-title":"Behavior of CFST short column and beam with initial concrete imperfection: Experiments","volume":"67","author":"Liao","year":"2011","journal-title":"J. Constr. Steel Res."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"106418","DOI":"10.1016\/j.jcsr.2020.106418","article-title":"Air void and ring gap effect on CFST arch bridges dynamic performance","volume":"177","author":"Lu","year":"2021","journal-title":"J. Constr. Steel Res."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"131","DOI":"10.1260\/1369433001502076","article-title":"The influence of concrete compaction on the strength of concrete filled steel tubes","volume":"3","author":"Han","year":"2000","journal-title":"Adv. Struct. Eng."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"751","DOI":"10.1016\/S0143-974X(02)00076-7","article-title":"Influence of concrete compaction on the strength of concrete-filled steel RHS columns","volume":"59","author":"Han","year":"2003","journal-title":"J. Constr. Steel Res."},{"key":"ref_15","first-page":"474","article-title":"A Comprehensive Research of the Air-void Defect of Concrete-filled Steel Tube","volume":"65","author":"Guo","year":"2021","journal-title":"Period. Polytech. Civ. Eng."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"1441","DOI":"10.1007\/s40996-020-00434-5","article-title":"CFST Rib with Circumferential Gap and SWS Composite Defects","volume":"45","author":"Guo","year":"2021","journal-title":"Iran. J. Sci. Technol. Trans. Civ. Eng."},{"key":"ref_17","first-page":"27","article-title":"Ultrasonic investigation of concrete with distributed damage","volume":"95","author":"Selleck","year":"1998","journal-title":"Mater. J."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"3504","DOI":"10.1016\/j.matdes.2009.03.008","article-title":"Non-destructive evaluation of concrete in damaged and undamaged states","volume":"30","author":"Shah","year":"2009","journal-title":"Mater. Des."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1016\/j.ultras.2019.04.002","article-title":"Nonlinear ultrasonic test of concrete cubes with induced crack","volume":"97","author":"Zhao","year":"2019","journal-title":"Ultrasonics"},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"495","DOI":"10.1016\/j.measurement.2018.06.049","article-title":"B-scan ultrasonic testing of rivets in multilayer structures based on short-time Fourier transform analysis","volume":"128","author":"Le","year":"2018","journal-title":"Measurement"},{"key":"ref_21","first-page":"574","article-title":"Detection of delamination in concrete using ultrasonic pulse velocity test","volume":"26","author":"Petro","year":"2012","journal-title":"Constr. Build. Mater."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"377","DOI":"10.1617\/s11527-008-9388-4","article-title":"Wave propagation in cementitious material containing artificial distributed damage","volume":"42","author":"Shiotani","year":"2009","journal-title":"Mater. Struct."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"2693141","DOI":"10.1155\/2019\/2693141","article-title":"Ultrasonic testing analysis of concrete structure based on S transform","volume":"2019","author":"Xu","year":"2019","journal-title":"Shock Vib."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"206","DOI":"10.1016\/j.ndteint.2010.11.003","article-title":"Tomographic reconstruction for concrete using attenuation of ultrasound","volume":"44","author":"Chai","year":"2011","journal-title":"NDT E Int."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1016\/j.ndteint.2012.09.001","article-title":"Short time Fourier transform analysis for understanding frequency dependent attenuation in austenitic stainless steel","volume":"53","author":"Sharma","year":"2013","journal-title":"NDT E Int."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"227","DOI":"10.32604\/sdhm.2021.010725","article-title":"Damage Detection in CFST Column by Simulation of Ultrasonic Waves Using STFT-Based Spectrogram and Welch Power Spectral Density Estimate","volume":"15","author":"Mutlib","year":"2021","journal-title":"Struct. Durab. Health Monit."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"89","DOI":"10.1243\/EMED_JOUR_1984_013_022_02","article-title":"The measurement of broadband ultrasonic attenuation in cancellous bone","volume":"13","author":"Langton","year":"1984","journal-title":"Eng. Med."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"64","DOI":"10.1109\/TUFFC.2008.617","article-title":"Broadband ultrasound attenuation in the calcaneal region: A comparative study of single-position versus scanning systems","volume":"55","author":"Maia","year":"2008","journal-title":"IEEE Trans. Ultrason. Ferroelectr. Freq. Control."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"785","DOI":"10.1016\/S0041-624X(96)00079-0","article-title":"An investigation of the measurement of broadband ultrasonic attenuation in trabecular bone","volume":"34","author":"Strelitzki","year":"1996","journal-title":"Ultrasonics"},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"503","DOI":"10.1016\/S8756-3282(02)00843-8","article-title":"Bone mineral density, ultrasound velocity, and broadband attenuation predict mechanical properties of trabecular bone differently","volume":"31","author":"Nieminen","year":"2002","journal-title":"Bone"},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"382","DOI":"10.1016\/j.ultras.2018.06.018","article-title":"Improving broadband ultrasound attenuation assessment in cancellous bone by mitigating the influence of cortical bone: Phantom and in-vitro study","volume":"94","author":"Tasinkevych","year":"2019","journal-title":"Ultrasonics"},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"316","DOI":"10.1007\/BF01623771","article-title":"Assessment of the relationship between broadband ultrasound attenuation and bone mineral density at the calcaneus using BUA imaging and DXA","volume":"7","author":"Chappard","year":"1997","journal-title":"Osteoporos. Int."},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"243","DOI":"10.1088\/0143-0815\/11\/3\/007","article-title":"A contact method for the assessment of ultrasonic velocity and broadband attenuation in cortical and cancellous bone","volume":"11","author":"Langton","year":"1990","journal-title":"Clin. Phys. Physiol. Meas."},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"2411","DOI":"10.1088\/0031-9155\/41\/11\/012","article-title":"The non-linear relationship between BUA and porosity in cancellous bone","volume":"41","author":"Hodgskinson","year":"1996","journal-title":"Phys. Med. Biol."},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"148","DOI":"10.1016\/0924-0136(96)85100-4","article-title":"Identification and characterisation of materials by broadband ultrasonic attenuation analysis","volume":"56","author":"Hull","year":"1996","journal-title":"J. Mater. Process. Technol."},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"7400","DOI":"10.1109\/JSEN.2020.2978427","article-title":"Defect Detection in Aluminum Bars Using Impedance and Ultrasonic Attenuation","volume":"20","author":"Maia","year":"2020","journal-title":"IEEE Sens. J."},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"557","DOI":"10.1016\/S0963-8695(01)00020-2","article-title":"NDE ultrasonic methods to characterise the porosity of mortar","volume":"34","author":"Vergara","year":"2001","journal-title":"NDT E Int."},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"247","DOI":"10.1016\/j.jcsr.2018.04.005","article-title":"Shape effect on axially loaded high strength CFST stub columns","volume":"147","author":"Piquer","year":"2018","journal-title":"J. Constr. 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