Matches in SemOpenAlex for { <https://semopenalex.org/work/W2074464342> ?p ?o ?g. }
- W2074464342 endingPage "1993" @default.
- W2074464342 startingPage "1976" @default.
- W2074464342 abstract "The surficial geology of the city of Ottawa primarily consists of soft soil sediments with low shear‐wave velocities (![Graphic][1] ) underlain by hard bedrock with very large shear‐wave velocities (![Graphic][2] ). Earthquake recordings show unusually large seismic amplification values for weak motion. These unusually large seismic amplification factors were reconfirmed with the earthquake spectral ratio method using two stations, the horizontal‐to‐vertical earthquake spectral ratio method using a single station, and the horizontal‐to‐vertical spectral ratio technique using background noise. These findings were the motivation for carrying out an extensive site response analysis, using finite element modeling (FEM), as a part of the seismic microzonation studies for the city of Ottawa. The FEM results confirmed the large amplification ratios for weak‐motion recordings. FEM analysis was also carried out using a selection of strong‐motion time series for the study area. The combined effect of the soil–bedrock acoustic impedance contrast and the level of ground shaking on the variation of soil amplification factors for the fundamental frequency were investigated. The maximum value of the soil amplification factor for the fundamental frequency increased with increasing impedance contrast ratios until the soil/bedrock acoustic impedance contrast ratio reached values that were usually greater than 12; however, the change in peak amplification was much less with subsequent increases in the contrast ratio beyond that value. As expected, the value of the soil amplification factors for the fundamental frequency decreased with increasing peak ground acceleration (PGA) of the input motion due to nonlinear soil damping. Finally, for the Ottawa region, a mathematical model is suggested for soil amplification factors at the fundamental frequency, as a function of the soil/bedrock acoustic impedance contrast ratio and the PGA of the input motion. [1]: /embed/inline-graphic-1.gif [2]: /embed/inline-graphic-2.gif" @default.
- W2074464342 created "2016-06-24" @default.
- W2074464342 creator A5016371548 @default.
- W2074464342 creator A5021721223 @default.
- W2074464342 creator A5022738815 @default.
- W2074464342 creator A5028571927 @default.
- W2074464342 creator A5059335918 @default.
- W2074464342 creator A5061067423 @default.
- W2074464342 creator A5077340254 @default.
- W2074464342 creator A5081205858 @default.
- W2074464342 creator A5087264401 @default.
- W2074464342 date "2012-10-01" @default.
- W2074464342 modified "2023-09-26" @default.
- W2074464342 title "Seismic Site Response Analysis for Ottawa, Canada: A Comprehensive Study Using Measurements and Numerical Simulations" @default.
- W2074464342 cites W1514703364 @default.
- W2074464342 cites W1526251291 @default.
- W2074464342 cites W1537008329 @default.
- W2074464342 cites W1573186872 @default.
- W2074464342 cites W1585329830 @default.
- W2074464342 cites W1907149755 @default.
- W2074464342 cites W1969052312 @default.
- W2074464342 cites W1985702648 @default.
- W2074464342 cites W1987461965 @default.
- W2074464342 cites W1988719636 @default.
- W2074464342 cites W2001325695 @default.
- W2074464342 cites W2007961290 @default.
- W2074464342 cites W2025480431 @default.
- W2074464342 cites W2032953382 @default.
- W2074464342 cites W2035249363 @default.
- W2074464342 cites W2037077804 @default.
- W2074464342 cites W2041745004 @default.
- W2074464342 cites W2044251630 @default.
- W2074464342 cites W2044535694 @default.
- W2074464342 cites W2048066813 @default.
- W2074464342 cites W2059738320 @default.
- W2074464342 cites W2079900792 @default.
- W2074464342 cites W2097791764 @default.
- W2074464342 cites W2103817435 @default.
- W2074464342 cites W2109605703 @default.
- W2074464342 cites W2109911863 @default.
- W2074464342 cites W2117244044 @default.
- W2074464342 cites W2123044823 @default.
- W2074464342 cites W2126977725 @default.
- W2074464342 cites W2133783052 @default.
- W2074464342 cites W2143226061 @default.
- W2074464342 cites W2143428270 @default.
- W2074464342 cites W2144101257 @default.
- W2074464342 cites W2144220928 @default.
- W2074464342 cites W2159613255 @default.
- W2074464342 cites W2189329269 @default.
- W2074464342 cites W2196188798 @default.
- W2074464342 cites W2205428642 @default.
- W2074464342 cites W2322164731 @default.
- W2074464342 cites W2335960302 @default.
- W2074464342 cites W2337932534 @default.
- W2074464342 cites W2342316945 @default.
- W2074464342 cites W2345797788 @default.
- W2074464342 cites W2365072056 @default.
- W2074464342 cites W2381496986 @default.
- W2074464342 cites W2433613461 @default.
- W2074464342 cites W2491423202 @default.
- W2074464342 cites W2549572034 @default.
- W2074464342 cites W2560212731 @default.
- W2074464342 cites W2598764254 @default.
- W2074464342 cites W273751351 @default.
- W2074464342 cites W2981356485 @default.
- W2074464342 cites W2981921192 @default.
- W2074464342 cites W3126384694 @default.
- W2074464342 cites W3132178687 @default.
- W2074464342 cites W3147351332 @default.
- W2074464342 cites W3154424050 @default.
- W2074464342 cites W2182388148 @default.
- W2074464342 doi "https://doi.org/10.1785/0120110248" @default.
- W2074464342 hasPublicationYear "2012" @default.
- W2074464342 type Work @default.
- W2074464342 sameAs 2074464342 @default.
- W2074464342 citedByCount "23" @default.
- W2074464342 countsByYear W20744643422014 @default.
- W2074464342 countsByYear W20744643422015 @default.
- W2074464342 countsByYear W20744643422016 @default.
- W2074464342 countsByYear W20744643422017 @default.
- W2074464342 countsByYear W20744643422018 @default.
- W2074464342 countsByYear W20744643422019 @default.
- W2074464342 countsByYear W20744643422020 @default.
- W2074464342 countsByYear W20744643422021 @default.
- W2074464342 countsByYear W20744643422022 @default.
- W2074464342 crossrefType "journal-article" @default.
- W2074464342 hasAuthorship W2074464342A5016371548 @default.
- W2074464342 hasAuthorship W2074464342A5021721223 @default.
- W2074464342 hasAuthorship W2074464342A5022738815 @default.
- W2074464342 hasAuthorship W2074464342A5028571927 @default.
- W2074464342 hasAuthorship W2074464342A5059335918 @default.
- W2074464342 hasAuthorship W2074464342A5061067423 @default.
- W2074464342 hasAuthorship W2074464342A5077340254 @default.
- W2074464342 hasAuthorship W2074464342A5081205858 @default.
- W2074464342 hasAuthorship W2074464342A5087264401 @default.
- W2074464342 hasConcept C127313418 @default.
- W2074464342 hasConcept C127413603 @default.
!["The surficial geology of the city of Ottawa primarily consists of soft soil sediments with low shear‐wave velocities (![Graphic][1] ) underlain by hard bedrock with very large shear‐wave velocities (![Graphic][2] ). Earthquake recordings show unusually large seismic amplification values for weak motion. These unusually large seismic amplification factors were reconfirmed with the earthquake spectral ratio method using two stations, the horizontal‐to‐vertical earthquake spectral ratio method using a single station, and the horizontal‐to‐vertical spectral ratio technique using background noise. These findings were the motivation for carrying out an extensive site response analysis, using finite element modeling (FEM), as a part of the seismic microzonation studies for the city of Ottawa. The FEM results confirmed the large amplification ratios for weak‐motion recordings. FEM analysis was also carried out using a selection of strong‐motion time series for the study area. The combined effect of the soil–bedrock acoustic impedance contrast and the level of ground shaking on the variation of soil amplification factors for the fundamental frequency were investigated. The maximum value of the soil amplification factor for the fundamental frequency increased with increasing impedance contrast ratios until the soil/bedrock acoustic impedance contrast ratio reached values that were usually greater than 12; however, the change in peak amplification was much less with subsequent increases in the contrast ratio beyond that value. As expected, the value of the soil amplification factors for the fundamental frequency decreased with increasing peak ground acceleration (PGA) of the input motion due to nonlinear soil damping. Finally, for the Ottawa region, a mathematical model is suggested for soil amplification factors at the fundamental frequency, as a function of the soil/bedrock acoustic impedance contrast ratio and the PGA of the input motion. [1]: /embed/inline-graphic-1.gif [2]: /embed/inline-graphic-2.gif"](?object=%22The%20surficial%20geology%20of%20the%20city%20of%20Ottawa%20primarily%20consists%20of%20soft%20soil%20sediments%20with%20low%20shear%E2%80%90wave%20velocities%20(!%5BGraphic%5D%5B1%5D%20)%20underlain%20by%20hard%20bedrock%20with%20very%20large%20shear%E2%80%90wave%20velocities%20(!%5BGraphic%5D%5B2%5D%20).%20Earthquake%20recordings%20show%20unusually%20large%20seismic%20amplification%20values%20for%20weak%20motion.%20These%20unusually%20large%20seismic%20amplification%20factors%20were%20reconfirmed%20with%20the%20earthquake%20spectral%20ratio%20method%20using%20two%20stations%2C%20the%20horizontal%E2%80%90to%E2%80%90vertical%20earthquake%20spectral%20ratio%20method%20using%20a%20single%20station%2C%20and%20the%20horizontal%E2%80%90to%E2%80%90vertical%20spectral%20ratio%20technique%20using%20background%20noise.%20These%20findings%20were%20the%20motivation%20for%20carrying%20out%20an%20extensive%20site%20response%20analysis%2C%20using%20finite%20element%20modeling%20(FEM)%2C%20as%20a%20part%20of%20the%20seismic%20microzonation%20studies%20for%20the%20city%20of%20Ottawa.%20The%20FEM%20results%20confirmed%20the%20large%20amplification%20ratios%20for%20weak%E2%80%90motion%20recordings.%20FEM%20analysis%20was%20also%20carried%20out%20using%20a%20selection%20of%20strong%E2%80%90motion%20time%20series%20for%20the%20study%20area.%20The%20combined%20effect%20of%20the%20soil%E2%80%93bedrock%20acoustic%20impedance%20contrast%20and%20the%20level%20of%20ground%20shaking%20on%20the%20variation%20of%20soil%20amplification%20factors%20for%20the%20fundamental%20frequency%20were%20investigated.%20The%20maximum%20value%20of%20the%20soil%20amplification%20factor%20for%20the%20fundamental%20frequency%20increased%20with%20increasing%20impedance%20contrast%20ratios%20until%20the%20soil%2Fbedrock%20acoustic%20impedance%20contrast%20ratio%20reached%20values%20that%20were%20usually%20greater%20than%2012%3B%20however%2C%20the%20change%20in%20peak%20amplification%20was%20much%20less%20with%20subsequent%20increases%20in%20the%20contrast%20ratio%20beyond%20that%20value.%20As%20expected%2C%20the%20value%20of%20the%20soil%20amplification%20factors%20for%20the%20fundamental%20frequency%20decreased%20with%20increasing%20peak%20ground%20acceleration%20(PGA)%20of%20the%20input%20motion%20due%20to%20nonlinear%20soil%20damping.%20Finally%2C%20for%20the%20Ottawa%20region%2C%20a%20mathematical%20model%20is%20suggested%20for%20soil%20amplification%20factors%20at%20the%20fundamental%20frequency%2C%20as%20a%20function%20of%20the%20soil%2Fbedrock%20acoustic%20impedance%20contrast%20ratio%20and%20the%20PGA%20of%20the%20input%20motion.%20%5B1%5D%3A%20%2Fembed%2Finline-graphic-1.gif%20%5B2%5D%3A%20%2Fembed%2Finline-graphic-2.gif%22){kind=link}