{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,8]],"date-time":"2026-07-08T11:23:43Z","timestamp":1783509823671,"version":"3.55.0"},"reference-count":29,"publisher":"MDPI AG","issue":"7","license":[{"start":{"date-parts":[[2020,4,2]],"date-time":"2020-04-02T00:00:00Z","timestamp":1585785600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Civil infrastructure is expanding around the world. The ever-growing trend toward urbanization drives the demand for new investments. However, the new constructions and gradual deterioration of those already existing, especially bridges, give rise to concerns about their proper maintenance. To improve safety and drive down maintenance costs of civil structures, there is a need for inexpensive sensing systems capable of reliable and automated monitoring. In this study, we present a new concept of thin-film strain sensors arranged in an array with a concentric layout that is incorporated into a flexible substrate sheet. The designed sensor array is intended to analyze strains in the proximity of round holes made at the crack tips, found in the investigated construction elements of civil structures. In this study, the performance of the sensor array was demonstrated using measurements taken on a highway bridge in one of the largest cities in Japan. We show that it can measure local strain distribution and indicate a region with risk for crack formation. The demonstrated results show new area of potential applications for the printed strain sensors in monitoring civil structures.<\/jats:p>","DOI":"10.3390\/s20071997","type":"journal-article","created":{"date-parts":[[2020,4,2]],"date-time":"2020-04-02T11:57:14Z","timestamp":1585828634000},"page":"1997","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":23,"title":["Concentric Array of Printed Strain Sensors for Structural Health Monitoring"],"prefix":"10.3390","volume":"20","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4587-0275","authenticated-orcid":false,"given":"Daniel","family":"Zymelka","sequence":"first","affiliation":[{"name":"National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki 305-8564, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kazuyoshi","family":"Togashi","sequence":"additional","affiliation":[{"name":"NMEMS Technology Research Organization, Tokyo 101-0026, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Takeshi","family":"Kobayashi","sequence":"additional","affiliation":[{"name":"National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki 305-8564, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2020,4,2]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"303","DOI":"10.1098\/rsta.2006.1928","article-title":"An introduction to structural health monitoring","volume":"365","author":"Farrar","year":"2007","journal-title":"Philos. Trans. R. Soc. A Math. Phys. Eng. Sci."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"1639","DOI":"10.1098\/rspa.2007.1834","article-title":"The fundamental axioms of structural health monitoring","volume":"463","author":"Worden","year":"2007","journal-title":"Proc. R. Soc. A"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1155\/2010\/724962","article-title":"Smart Sensing Technologies for Structural Health Monitoring of Civil Engineering Structures","volume":"2010","author":"Sun","year":"2010","journal-title":"Adv. Civ. Eng."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"91","DOI":"10.1177\/0583102406061499","article-title":"A Summary Review of Wireless Sensors and Sensor Networks for Structural Health Monitoring","volume":"38","author":"Lynch","year":"2006","journal-title":"Shock Vib. Dig."},{"key":"ref_5","first-page":"228","article-title":"Damage diagnostic technique for structural health monitoring using POD and self adaptive differential evolution algorithm","volume":"106","author":"Rao","year":"2012","journal-title":"Comput. Struct."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"8601","DOI":"10.3390\/s120708601","article-title":"Recent Progress in Distributed Fiber Optic Sensors","volume":"12","author":"Bao","year":"2012","journal-title":"Sensors"},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"124017","DOI":"10.1088\/0957-0233\/27\/12\/124017","article-title":"Full scale strain monitoring of a suspension bridge using high performance distributed fiber optic sensors","volume":"27","author":"Xu","year":"2016","journal-title":"Meas. Sci. Technol."},{"key":"ref_8","doi-asserted-by":"crossref","unstructured":"Bedon, C., Bergamo, E., Izzi, M., and No\u00e8, S. (2018). Prototyping and Validation of MEMS Accelerometers for Structural Health Monitoring\u2014The Case Study of the Pietratagliata Cable-Stayed Bridge. J. Sens. Actuator Netw., 7.","DOI":"10.3390\/jsan7030030"},{"key":"ref_9","doi-asserted-by":"crossref","unstructured":"Zhu, L., Fu, Y.G., Chow, R., Spencer, B.F., Park, J.W., and Mechitov, K. (2018). Development of a High-Sensitivity Wireless Accelerometer for Structural Health Monitoring. Sensors, 18.","DOI":"10.3390\/s18010262"},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"11","DOI":"10.1007\/s13349-014-0097-0","article-title":"Action effects in post-tensioned concrete box-girder bridges obtained from high-frequency monitoring","volume":"5","author":"Treacy","year":"2015","journal-title":"J. Civ. Struct. Health Monit."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"104","DOI":"10.1016\/j.ijfatigue.2016.09.019","article-title":"Data-based models for fatigue reliability of orthotropic steel bridge decks based on temperature, traffic and strain monitoring","volume":"95","author":"Chryssanthopoulos","year":"2017","journal-title":"Int. J. Fatigue"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"69","DOI":"10.3141\/2200-09","article-title":"Development of a Technique to Improve Fatigue Lives of Crack-Stop Holes in Steel Bridges","volume":"2200","author":"Crain","year":"2010","journal-title":"Transp. Res. Rec."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"115","DOI":"10.1016\/j.engfracmech.2015.03.027","article-title":"Mixed mode fatigue crack initiation and growth in a CT specimen repaired by stop hole technique","volume":"145","author":"Ayatollahi","year":"2015","journal-title":"Eng. Fract. Mech."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"075602","DOI":"10.1088\/0957-0233\/25\/7\/075602","article-title":"Sensing sheet: the sensitivity of thin-film full-bridge strain sensors for crack detection and characterization","volume":"25","author":"Tung","year":"2014","journal-title":"Meas. Sci. Technol."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"8088","DOI":"10.3390\/s150408088","article-title":"Detection of Steel Fatigue Cracks with Strain Sensing Sheets Based on Large Area Electronics","volume":"15","author":"Yao","year":"2015","journal-title":"Sensors"},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"124010","DOI":"10.1088\/0957-0233\/27\/12\/124010","article-title":"Sensing sheet: the response of full-bridge strain sensors to thermal variations for detecting and characterizing cracks","volume":"27","author":"Tung","year":"2016","journal-title":"Meas. Sci. Technol."},{"key":"ref_17","doi-asserted-by":"crossref","unstructured":"Aygun, L.E., Kumar, V., Weaver, C., Gerber, M., Wagner, S., Verma, N., Glisic, B., and Sturm, J.C. (2020). Large-Area Resistive Strain Sensing Sheet for Structural Health Monitoring. Sensors, 20.","DOI":"10.3390\/s20051386"},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"115008","DOI":"10.1088\/1361-665X\/aadbfb","article-title":"Sensing distortion-induced fatigue cracks in steel bridges with capacitive skin sensor arrays","volume":"27","author":"Kong","year":"2018","journal-title":"Smart Mater. Struct."},{"key":"ref_19","doi-asserted-by":"crossref","unstructured":"Yan, J., Downey, A., Cancelli, A., Laflamme, S., Chen, A., Li, J., and Ubertini, F. (2019). Concrete Crack Detection and Monitoring Using a Capacitive Dense Sensor Array. Sensors, 19.","DOI":"10.3390\/s19081843"},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"8840","DOI":"10.1109\/JSEN.2016.2578936","article-title":"Ultra-Thin Piezoelectric Strain Sensor Array Integrated on a Flexible Printed Circuit Involving Transfer Printing Methods","volume":"16","author":"Yamashita","year":"2016","journal-title":"IEEE Sens. J."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"035018","DOI":"10.1088\/0964-1726\/21\/3\/035018","article-title":"Development of a PZT-based wireless digital monitor for composite impact monitoring","volume":"21","author":"Liu","year":"2012","journal-title":"Smart Mater. Struct."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"28379","DOI":"10.1039\/C5RA01519G","article-title":"Directly printed stretchable strain sensor based on ring and diamond shaped silver nanowire electrodes","volume":"5","author":"Lee","year":"2015","journal-title":"RSC Adv."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"7371","DOI":"10.1021\/acsami.7b17766","article-title":"Highly Stretchable and Wearable Strain Sensor Based on Printable Carbon Nanotube Layers\/Polydimethylsiloxane Composites with Adjustable Sensitivity","volume":"10","author":"Wang","year":"2018","journal-title":"ACS Appl. Mater. Interfaces"},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"105040","DOI":"10.1088\/1361-665X\/aa8831","article-title":"Printed strain sensor array for application to structural health monitoring","volume":"26","author":"Zymelka","year":"2017","journal-title":"Smart Mater. Struct."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"05GD05","DOI":"10.7567\/JJAP.57.05GD05","article-title":"Printed strain sensors for early damage detection in engineering structures","volume":"57","author":"Zymelka","year":"2018","journal-title":"Jpn. J. Appl. Phys."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"05EC02","DOI":"10.7567\/JJAP.56.05EC02","article-title":"Printed strain sensor with temperature compensation and its evaluation with an example of applications in structural health monitoring","volume":"56","author":"Zymelka","year":"2017","journal-title":"Jpn. J. Appl. Phys."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"27","DOI":"10.1016\/j.proeng.2010.03.004","article-title":"Small fatigue crack propagation in notched components under combined torsional and axial loading","volume":"2","author":"Tanaka","year":"2010","journal-title":"Procedia Eng."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"262","DOI":"10.1016\/j.proeng.2016.08.889","article-title":"Mixed mode (I plus II) fatigue crack growth of long term operating bridge steel","volume":"160","author":"Lesiuk","year":"2016","journal-title":"Procedia Eng."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"6230","DOI":"10.1002\/adma.201503288","article-title":"Thickness-Gradient Films for High Gauge Factor Stretchable Strain Sensors","volume":"27","author":"Liu","year":"2015","journal-title":"Adv. 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