In-Plane Quasi-Static Cyclic Testing of Rc Frames Retrofitted With Rigid/Dissipating Steel Haunches

In-Plane Quasi-Static Cyclic Testing of Rc Frames Retrofitted With Rigid/Dissipating Steel Haunches | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Article In-Plane Quasi-Static Cyclic Testing of Rc Frames Retrofitted With Rigid/Dissipating Steel Haunches Babar Ilyas, Faizullah Jan, Khaled Mohamed Khedher, Arif Ullah, and 4 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-4729583/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract This research assessed the reliability of haunch retrofitting technique for seismic upgrade of critically damaged frames. Two 1:3 reduced scale two-story RC frames were taken under considered, which were tested previously till the near collapse state. The haunches are employed to strengthen the joint shear strength of the badly damaged joints, which are indicative of old, non-seismic, or defective joints. Damaged concrete was replaced with new high-strength concrete, and haunch-retrofitting technique was adopted to strengthen beam-column connections, in order to avoid shear hinging at joints under lateral loads. The retrofitted frames were tested through quasi-static cyclic loads in a displacement-control condition for multiple-levels of roof drifts. In order to assess the following seismic response factors: stiffness, strength, ductility, and response modification factors—lateral force-displacement capacity curves were created and examined. Hysteretic responses of tested models were analyzed to quantify hysteretic damping. The seismic performance assessment of the retrofitted frames was conducted utilizing a code-based static force approach in multiple seismic zones. The rigid haunches contributed to the over strength factor while the dissipating haunch has major contribution in energy dissipation of the retrofitted frames. Physical sciences/Engineering/Civil engineering Physical sciences/Engineering/Mechanical engineering Beam-Column Joints Damage Scale Haunch Repair and Strengthening Quasi-Static Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Posted Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. 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Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-4729583","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":336541818,"identity":"5a7a18f8-31d3-464b-8bc4-25b486485c3c","order_by":0,"name":"Babar Ilyas","email":"","orcid":"","institution":"University of Minho","correspondingAuthor":false,"prefix":"","firstName":"Babar","middleName":"","lastName":"Ilyas","suffix":""},{"id":336541819,"identity":"2ca27f3e-77ac-4380-9500-164f07534bcc","order_by":1,"name":"Faizullah 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Two 1:3 reduced scale two-story RC frames were taken under considered, which were tested previously till the near collapse state. The haunches are employed to strengthen the joint shear strength of the badly damaged joints, which are indicative of old, non-seismic, or defective joints. Damaged concrete was replaced with new high-strength concrete, and haunch-retrofitting technique was adopted to strengthen beam-column connections, in order to avoid shear hinging at joints under lateral loads. The retrofitted frames were tested through quasi-static cyclic loads in a displacement-control condition for multiple-levels of roof drifts. In order to assess the following seismic response factors: stiffness, strength, ductility, and response modification factors—lateral force-displacement capacity curves were created and examined. Hysteretic responses of tested models were analyzed to quantify hysteretic damping. The seismic performance assessment of the retrofitted frames was conducted utilizing a code-based static force approach in multiple seismic zones. The rigid haunches contributed to the over strength factor while the dissipating haunch has major contribution in energy dissipation of the retrofitted frames.","manuscriptTitle":"In-Plane Quasi-Static Cyclic Testing of Rc Frames Retrofitted With Rigid/Dissipating Steel Haunches","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2024-08-08 04:52:05","doi":"10.21203/rs.3.rs-4729583/v1","editorialEvents":[{"type":"communityComments","content":0}],"status":"published","journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true}}],"origin":"","ownerIdentity":"18c66efe-0355-4c87-bed5-3c553fdbd47e","owner":[],"postedDate":"August 8th, 2024","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"posted","subjectAreas":[{"id":35745868,"name":"Physical sciences/Engineering/Civil engineering"},{"id":35745869,"name":"Physical sciences/Engineering/Mechanical engineering"}],"tags":[],"updatedAt":"2024-09-13T04:32:41+00:00","versionOfRecord":[],"versionCreatedAt":"2024-08-08 04:52:05","video":"","vorDoi":"","vorDoiUrl":"","workflowStages":[]},"version":"v1","identity":"rs-4729583","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-4729583","identity":"rs-4729583","version":["v1"]},"buildId":"qtupq5eGEP_6zYnWcrvyt","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}