{"id":{"repo_id":"sask","oai_identifier":"oai:harvest.usask.ca:10388/14735"},"canonical_url":"https://search.dev.ndltd.org/etd/sask/oai:harvest.usask.ca:10388/14735","repository":{"repo_id":"sask","name":"University of Saskatchewan","base_url":"https://harvest.usask.ca/server/oai/request"},"display":{"title":"Confinement Limits For Tensile Lap Splices Under Static Loading","abstract":"ABSTRACT In tension lap splices, the benefit provided to the lap by stirrups placed to intercept cracking due to bond splitting action is recognized by the American Concrete Institute (ACI 318-89) and the design recommendations of the ACI Committee 408, on which the American code provisions are partially based. However, a limit exists on the benefit that can be derived from this confinement. In Canada, CSA Standard CAN3 A23.3 M-84, does not directly recognize the confinement benefit provided by stirrups along a lap splice. The current study shows that the ACI limit of one bar diameter of equivalent concrete cover provided by the transverse reinforcement confinement is too restrictive under static loading. When the concrete cover is small, much larger transverse reinforcement confinement, up to 2-2.5 bar diameters of equivalent concrete cover can be utilized, in lieu of requiring very long lap lengths. The tests also show that total confinement (actual concrete confinement plus equivalent concrete confinement provided by stirrups) is effective beyond the current limit of 3 main bar diameters, when stirrups are provided. Good performance was found with confinements of 4-4.5 bar diameters, and correspondingly shorter lap splice lengths.","abstract_html":"ABSTRACT In tension lap splices, the benefit provided to the lap by stirrups placed to intercept cracking due to bond splitting action is recognized by the American Concrete Institute (ACI 318-89) and the design recommendations of the ACI Committee 408, on which the American code provisions are partially based. However, a limit exists on the benefit that can be derived from this confinement. In Canada, CSA Standard CAN3 A23.3 M-84, does not directly recognize the confinement benefit provided by stirrups along a lap splice. The current study shows that the ACI limit of one bar diameter of equivalent concrete cover provided by the transverse reinforcement confinement is too restrictive under static loading. When the concrete cover is small, much larger transverse reinforcement confinement, up to 2-2.5 bar diameters of equivalent concrete cover can be utilized, in lieu of requiring very long lap lengths. The tests also show that total confinement (actual concrete confinement plus equivalent concrete confinement provided by stirrups) is effective beyond the current limit of 3 main bar diameters, when stirrups are provided. Good performance was found with confinements of 4-4.5 bar diameters, and correspondingly shorter lap splice lengths.","abstract_has_math":false,"creators":["Konkankar, Uday S"],"institution":"University of Saskatchewan","degree_name":"Master of Science (M.Sc.)","degree_level":"Undergraduate","degree_discipline":"Civil Engineering","degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":1991,"date_issued":"1991-11","date_published":"1991-11","updated_at":"2026-07-24T04:27:06Z","subjects":[],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://hdl.handle.net/10388/14735","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Konkankar, Uday S"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2023-06-22T21:56:52Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2023-06-22T21:56:52Z"]},{"key":"dc:date.issued","label":"Date","values":["1991-11"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Civil Engineering"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Undergraduate"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Master of Science (M.Sc.)"]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Saskatchewan"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["https://hdl.handle.net/10388/14735"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["ABSTRACT In tension lap splices, the benefit provided to the lap by stirrups placed to intercept cracking due to bond splitting action is recognized by the American Concrete Institute (ACI 318-89) and the design recommendations of the ACI Committee 408, on which the American code provisions are partially based. However, a limit exists on the benefit that can be derived from this confinement. In Canada, CSA Standard CAN3 A23.3 M-84, does not directly recognize the confinement benefit provided by stirrups along a lap splice. The current study shows that the ACI limit of one bar diameter of equivalent concrete cover provided by the transverse reinforcement confinement is too restrictive under static loading. When the concrete cover is small, much larger transverse reinforcement confinement, up to 2-2.5 bar diameters of equivalent concrete cover can be utilized, in lieu of requiring very long lap lengths. The tests also show that total confinement (actual concrete confinement plus equivalent concrete confinement provided by stirrups) is effective beyond the current limit of 3 main bar diameters, when stirrups are provided. Good performance was found with confinements of 4-4.5 bar diameters, and correspondingly shorter lap splice lengths."]},{"key":"dc:title","label":"Title","values":["Confinement Limits For Tensile Lap Splices Under Static Loading"]}]}],"canonical_facts":{"dc:creator":["Konkankar, Uday S"],"dc:date.accessioned":["2023-06-22T21:56:52Z"],"dc:date.available":["2023-06-22T21:56:52Z"],"dc:date.issued":["1991-11"],"dc:description.abstract":["ABSTRACT In tension lap splices, the benefit provided to the lap by stirrups placed to intercept cracking due to bond splitting action is recognized by the American Concrete Institute (ACI 318-89) and the design recommendations of the ACI Committee 408, on which the American code provisions are partially based. However, a limit exists on the benefit that can be derived from this confinement. In Canada, CSA Standard CAN3 A23.3 M-84, does not directly recognize the confinement benefit provided by stirrups along a lap splice. The current study shows that the ACI limit of one bar diameter of equivalent concrete cover provided by the transverse reinforcement confinement is too restrictive under static loading. When the concrete cover is small, much larger transverse reinforcement confinement, up to 2-2.5 bar diameters of equivalent concrete cover can be utilized, in lieu of requiring very long lap lengths. The tests also show that total confinement (actual concrete confinement plus equivalent concrete confinement provided by stirrups) is effective beyond the current limit of 3 main bar diameters, when stirrups are provided. Good performance was found with confinements of 4-4.5 bar diameters, and correspondingly shorter lap splice lengths."],"dc:identifier.uri":["https://hdl.handle.net/10388/14735"],"dc:title":["Confinement Limits For Tensile Lap Splices Under Static Loading"],"thesis:degree_discipline":["Civil Engineering"],"thesis:degree_level":["Undergraduate"],"thesis:degree_name":["Master of Science (M.Sc.)"],"thesis:institution_name":["University of Saskatchewan"]},"updated_at":"2026-07-24T04:27:06Z"}