{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,5]],"date-time":"2026-03-05T22:26:55Z","timestamp":1772749615090,"version":"3.50.1"},"reference-count":18,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2006,11,29]],"date-time":"2006-11-29T00:00:00Z","timestamp":1164758400000},"content-version":"vor","delay-in-days":6421,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Earthq Engng Struct Dyn"],"published-print":{"date-parts":[[1989,5]]},"abstract":"Abstract<\/jats:title>Rotational components of seismic waves have been estimated using the strong motion array in Taiwan, SMART\u20101. The inner rings of accelerographs, covering an approximately circular area of 3 km2<\/jats:sup>, permit a decomposition of travelling waves with wavelengths in the range 0.5 to 5.0 km and frequencies from 0.1 to 5 Hz.<\/jats:p>Rotational components of the strain field, obtained from station pairs and averaged over the array using stacking techniques, were computed for five different earthquakes with M<\/jats:italic>s<\/jats:sub> magnitude 5.7 to 7.8, and epicentral distances 6 to 84 km. The results indicate peak rotation values about a vertical axis on the order of 4 \u00d7 10\u22125<\/jats:sup> rad at an approximately 2.5 s period. The measured values for pure rotation and rocking are in agreement with the spatial coherency structure observed in these earthquakes. For comparison, significant effects to engineered structures generally appear when curl u<\/jats:bold> > 10\u22124<\/jats:sup> rad. The estimates are important for design of scaled engineered models for soil\u2010structure interaction experiments.<\/jats:p>","DOI":"10.1002\/eqe.4290180406","type":"journal-article","created":{"date-parts":[[2007,4,1]],"date-time":"2007-04-01T19:46:50Z","timestamp":1175456810000},"page":"517-526","source":"Crossref","is-referenced-by-count":60,"title":["Rotational components of surface strong ground motion"],"prefix":"10.1002","volume":"18","author":[{"given":"Carlos S.","family":"Oliveira","sequence":"first","affiliation":[]},{"given":"Bruce A.","family":"Bolt","sequence":"additional","affiliation":[]}],"member":"311","published-online":{"date-parts":[[2006,11,29]]},"reference":[{"key":"e_1_2_1_2_2","volume-title":"Elementary Seismology","author":"Richter C. F.","year":"1958"},{"key":"e_1_2_1_3_2","first-page":"43","article-title":"On some results of observation of torsional ground motions and their response analysis","volume":"10","author":"Shibata H.","year":"1976","journal-title":"Bull. ERS"},{"key":"e_1_2_1_4_2","first-page":"A3.19","article-title":"Torsion in symmetrical buildings","author":"Newmark N. M.","year":"1969","journal-title":"Proc. 4th world conf. earthquake eng. Santiago do Chile"},{"key":"e_1_2_1_5_2","doi-asserted-by":"crossref","first-page":"105","DOI":"10.1785\/BSSA0660010105","article-title":"Rotation of footing due to surface waves","volume":"66","author":"Stratta J. L.","year":"1976","journal-title":"Bull seism. soc. Am."},{"key":"e_1_2_1_6_2","doi-asserted-by":"crossref","first-page":"397","DOI":"10.1061\/JSDEAG.0003999","article-title":"Torsional response of high rise buildings","volume":"101","author":"Hart G. C.","year":"1975","journal-title":"J. struct. div. 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B.Darragh \u2018Analysis of the near\u2010source waves: Separation of wave types using strong motion array recordings\u2019 Ph.D. Thesis University of California Berkeley. 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