Torsional motion of buildings during earthquakes. I. Elastic response
Analytical studies are carried out on the elastic torsional response of single- and multi-storey building models subjected to earthquake motion. Effects of both the natural and accidental torsion are considered. The results of analysis are compared with the design provisions of the National Building...
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| Veröffentlicht in: | Canadian journal of civil engineering 1998-10, Vol.25 (5), p.898-916 |
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| creator | Humar, J L Kumar, P |
| description | Analytical studies are carried out on the elastic torsional response of single- and multi-storey building models subjected to earthquake motion. Effects of both the natural and accidental torsion are considered. The results of analysis are compared with the design provisions of the National Building Code of Canada (NBCC). It is shown that the NBCC provisions for the design of resisting elements on the flexible side are overly conservative. On the other hand, provisions for the design of elements on the stiff side are conservative in some situations and inadequate in others. Modifications to the design provisions are suggested which give design forces closer to the results obtained from a dynamic analysis, and are at the same time simpler than the existing provisions. It is shown that the ratio of the uncoupled torsional and translational frequencies is an important parameter governing the torsional response and it would be a good practice in design to achieve a value greater than 1 for this ratio.Key words: earthquake response, natural torsion, accidental torsion, elastic torsional response, design for torsion. |
| doi_str_mv | 10.1139/l98-031 |
| format | Article |
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It is shown that the ratio of the uncoupled torsional and translational frequencies is an important parameter governing the torsional response and it would be a good practice in design to achieve a value greater than 1 for this ratio.Key words: earthquake response, natural torsion, accidental torsion, elastic torsional response, design for torsion.</description><identifier>ISSN: 0315-1468</identifier><identifier>EISSN: 1208-6029</identifier><identifier>DOI: 10.1139/l98-031</identifier><identifier>CODEN: CJCEB8</identifier><language>eng</language><publisher>Ottawa, Canada: NRC Research Press</publisher><subject>Applied sciences ; Buildings. Public works ; Earthquakes ; Exact sciences and technology ; Geotechnics ; Seismic activity ; Stresses. Safety ; Structural analysis. Stresses ; Structure-soil interaction</subject><ispartof>Canadian journal of civil engineering, 1998-10, Vol.25 (5), p.898-916</ispartof><rights>1999 INIST-CNRS</rights><rights>Copyright National Research Council of Canada Oct 1998</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a399t-4c9411b7b38984d0131fd90d050c0a9f25da545e02916f8f08536262a7336bb43</citedby></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,27901,27902</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=1703341$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Humar, J L</creatorcontrib><creatorcontrib>Kumar, P</creatorcontrib><title>Torsional motion of buildings during earthquakes. I. Elastic response</title><title>Canadian journal of civil engineering</title><addtitle>Canadian Journal of Civil Engineering</addtitle><description>Analytical studies are carried out on the elastic torsional response of single- and multi-storey building models subjected to earthquake motion. Effects of both the natural and accidental torsion are considered. The results of analysis are compared with the design provisions of the National Building Code of Canada (NBCC). It is shown that the NBCC provisions for the design of resisting elements on the flexible side are overly conservative. On the other hand, provisions for the design of elements on the stiff side are conservative in some situations and inadequate in others. Modifications to the design provisions are suggested which give design forces closer to the results obtained from a dynamic analysis, and are at the same time simpler than the existing provisions. It is shown that the ratio of the uncoupled torsional and translational frequencies is an important parameter governing the torsional response and it would be a good practice in design to achieve a value greater than 1 for this ratio.Key words: earthquake response, natural torsion, accidental torsion, elastic torsional response, design for torsion.</description><subject>Applied sciences</subject><subject>Buildings. Public works</subject><subject>Earthquakes</subject><subject>Exact sciences and technology</subject><subject>Geotechnics</subject><subject>Seismic activity</subject><subject>Stresses. Safety</subject><subject>Structural analysis. 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I. Elastic response</title><author>Humar, J L ; Kumar, P</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a399t-4c9411b7b38984d0131fd90d050c0a9f25da545e02916f8f08536262a7336bb43</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1998</creationdate><topic>Applied sciences</topic><topic>Buildings. Public works</topic><topic>Earthquakes</topic><topic>Exact sciences and technology</topic><topic>Geotechnics</topic><topic>Seismic activity</topic><topic>Stresses. Safety</topic><topic>Structural analysis. Stresses</topic><topic>Structure-soil interaction</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Humar, J L</creatorcontrib><creatorcontrib>Kumar, P</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>ProQuest Central (Corporate)</collection><collection>Environment Abstracts</collection><collection>Water Resources Abstracts</collection><collection>ProQuest Central (purchase pre-March 2016)</collection><collection>Science Database (Alumni Edition)</collection><collection>STEM Database</collection><collection>Technology Research Database</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>ProQuest Central (Alumni) (purchase pre-March 2016)</collection><collection>Canadian Business & Current Affairs Database</collection><collection>Canadian Business & Current Affairs Database (Alumni Edition)</collection><collection>Materials Science & Engineering Collection</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest One Sustainability</collection><collection>ProQuest Central UK/Ireland</collection><collection>Agricultural & Environmental Science Collection</collection><collection>ProQuest Central Essentials</collection><collection>eLibrary</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>Natural Science Collection</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central Korea</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Engineering Research Database</collection><collection>ProQuest Central Student</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>SciTech Premium Collection</collection><collection>Civil Engineering Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>ProQuest Engineering Collection</collection><collection>Science Database</collection><collection>CBCA Reference & Current Events</collection><collection>Engineering Database</collection><collection>Environmental Science Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>Engineering Collection</collection><collection>Environmental Science Collection</collection><collection>ProQuest Central Basic</collection><collection>Environment Abstracts</collection><collection>Earthquake Engineering Abstracts</collection><jtitle>Canadian journal of civil engineering</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Humar, J L</au><au>Kumar, P</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Torsional motion of buildings during earthquakes. I. Elastic response</atitle><jtitle>Canadian journal of civil engineering</jtitle><addtitle>Canadian Journal of Civil Engineering</addtitle><date>1998-10-01</date><risdate>1998</risdate><volume>25</volume><issue>5</issue><spage>898</spage><epage>916</epage><pages>898-916</pages><issn>0315-1468</issn><eissn>1208-6029</eissn><coden>CJCEB8</coden><abstract>Analytical studies are carried out on the elastic torsional response of single- and multi-storey building models subjected to earthquake motion. Effects of both the natural and accidental torsion are considered. The results of analysis are compared with the design provisions of the National Building Code of Canada (NBCC). It is shown that the NBCC provisions for the design of resisting elements on the flexible side are overly conservative. On the other hand, provisions for the design of elements on the stiff side are conservative in some situations and inadequate in others. Modifications to the design provisions are suggested which give design forces closer to the results obtained from a dynamic analysis, and are at the same time simpler than the existing provisions. It is shown that the ratio of the uncoupled torsional and translational frequencies is an important parameter governing the torsional response and it would be a good practice in design to achieve a value greater than 1 for this ratio.Key words: earthquake response, natural torsion, accidental torsion, elastic torsional response, design for torsion.</abstract><cop>Ottawa, Canada</cop><pub>NRC Research Press</pub><doi>10.1139/l98-031</doi><tpages>19</tpages></addata></record> |
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| ispartof | Canadian journal of civil engineering, 1998-10, Vol.25 (5), p.898-916 |
| issn | 0315-1468 1208-6029 |
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| source | Alma/SFX Local Collection |
| subjects | Applied sciences Buildings. Public works Earthquakes Exact sciences and technology Geotechnics Seismic activity Stresses. Safety Structural analysis. Stresses Structure-soil interaction |
| title | Torsional motion of buildings during earthquakes. I. Elastic response |
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