{"id":{"repo_id":"vt","oai_identifier":"oai:vtechworks.lib.vt.edu:10919/43128"},"canonical_url":"https://search.dev.ndltd.org/etd/vt/oai:vtechworks.lib.vt.edu:10919/43128","repository":{"repo_id":"vt","name":"Virginia Tech","base_url":"https://vtechworks.lib.vt.edu/oai/request"},"display":{"title":"Influence of base isolation on the response of structures to earthquakes","abstract":"In this thesis, the seismic analysis of base isolated structures is carried out using a base coordinate relative to the inertial space that renders absolute dynamic response, which is fundamental in assessing base isolation. Moreover, the structure is modeled as an Euler-Bernoulli beam cantilevered on a massive basement. The isolation system is modeled as linear. The stochastic analysis is carried out in the frequency domain using a stationary Clough-Penzien spectral representation for the ground excitation. Standard deviations of the structure’s generalized coordinates and their second derivatives are obtained, which characterize the response, including stresses, of the structure. The effectiveness of base isolation can be evaluated by comparing the response of the isolated structure with the nonisolated counterpart. The results show that base isolation is highly effective in reducing the overall response of the structure. Additionally, it is found that the Clough-Penzien representation does not model adequately in the high frequency range. A modification of this model is proposed.","abstract_html":"In this thesis, the seismic analysis of base isolated structures is carried out using a base coordinate relative to the inertial space that renders absolute dynamic response, which is fundamental in assessing base isolation. Moreover, the structure is modeled as an Euler-Bernoulli beam cantilevered on a massive basement. The isolation system is modeled as linear. The stochastic analysis is carried out in the frequency domain using a stationary Clough-Penzien spectral representation for the ground excitation. Standard deviations of the structure’s generalized coordinates and their second derivatives are obtained, which characterize the response, including stresses, of the structure. The effectiveness of base isolation can be evaluated by comparing the response of the isolated structure with the nonisolated counterpart. The results show that base isolation is highly effective in reducing the overall response of the structure. Additionally, it is found that the Clough-Penzien representation does not model adequately in the high frequency range. A modification of this model is proposed.","abstract_has_math":false,"creators":["Morales Velasco, Cesar Augusto"],"institution":"Virginia Tech","degree_name":"Master of Science","degree_level":"masters","degree_discipline":"Engineering Mechanics","degree_department":"Engineering Mechanics","school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":1995,"date_issued":"1995","date_published":"1995","updated_at":"2026-07-22T22:20:27Z","subjects":[],"languages":["en"],"rights":["In Copyright"],"rights_urls":["http://rightsstatements.org/vocab/InC/1.0/"],"identifier_entries":[{"key":"dc:identifier.other","label":"Dc Identifier Other","values":["etd-06112009-063136"],"render_values":[{"text":"etd-06112009-063136","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/10919/43128","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.department","label":"Department","values":["Engineering Mechanics"]},{"key":"dc:creator","label":"Author","values":["Morales Velasco, Cesar Augusto"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2014-03-14T21:37:51Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2014-03-14T21:37:51Z","2009-06-11"]},{"key":"dc:date.issued","label":"Date","values":["1995"]},{"key":"dc:publisher","label":"Institution","values":["Virginia Tech"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]},{"key":"dc:type.dcmitype","label":"Dc Type Dcmitype","values":["Text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Engineering Mechanics"]},{"key":"thesis:degree_level","label":"Degree Level","values":["masters"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Master of Science"]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["Virginia Polytechnic Institute and State University"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["In Copyright"]},{"key":"dc:rights.uri","label":"Rights URI","values":["http://rightsstatements.org/vocab/InC/1.0/"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.other","label":"Dc Identifier Other","values":["etd-06112009-063136"]},{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/10919/43128"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["In this thesis, the seismic analysis of base isolated structures is carried out using a base coordinate relative to the inertial space that renders absolute dynamic response, which is fundamental in assessing base isolation. Moreover, the structure is modeled as an Euler-Bernoulli beam cantilevered on a massive basement. The isolation system is modeled as linear. The stochastic analysis is carried out in the frequency domain using a stationary Clough-Penzien spectral representation for the ground excitation. Standard deviations of the structure’s generalized coordinates and their second derivatives are obtained, which characterize the response, including stresses, of the structure. The effectiveness of base isolation can be evaluated by comparing the response of the isolated structure with the nonisolated counterpart. The results show that base isolation is highly effective in reducing the overall response of the structure. Additionally, it is found that the Clough-Penzien representation does not model adequately in the high frequency range. A modification of this model is proposed."]},{"key":"dc:description.degree","label":"Dc Description Degree","values":["Master of Science"]},{"key":"dc:format.medium","label":"Dc Format Medium","values":["BTD"]},{"key":"dc:format.mimetype","label":"Dc Format Mimetype","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Influence of base isolation on the response of structures to earthquakes"]}]}],"canonical_facts":{"dc:contributor.department":["Engineering Mechanics"],"dc:creator":["Morales Velasco, Cesar Augusto"],"dc:date.accessioned":["2014-03-14T21:37:51Z"],"dc:date.available":["2014-03-14T21:37:51Z","2009-06-11"],"dc:date.issued":["1995"],"dc:description.abstract":["In this thesis, the seismic analysis of base isolated structures is carried out using a base coordinate relative to the inertial space that renders absolute dynamic response, which is fundamental in assessing base isolation. 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