{"id":{"repo_id":"vt","oai_identifier":"oai:vtechworks.lib.vt.edu:10919/84849"},"canonical_url":"https://search.dev.ndltd.org/etd/vt/oai:vtechworks.lib.vt.edu:10919/84849","repository":{"repo_id":"vt","name":"Virginia Tech","base_url":"https://vtechworks.lib.vt.edu/oai/request"},"display":{"title":"Application of Ductile Yield Link in Glulam Moment Connections","abstract":"Wood beam-column connections have traditionally been designed as simple shear connections, ignoring their potential moment capacity. A major reason for not utilizing such moment connections is linked to the brittle limit states that wood components exhibit. The purpose of this research was to develop and test a ductile and high-strength wood moment frame connection. A design procedure for such a connection is presented herein. The proposed glulam beam-column connection utilizes an embedded steel knife plate with a reduced section that acts as a ductile yield link, thus limiting the moment that can be transferred through the connection. This configuration is intended to fail through yielding of the ductile link, thus preventing non-ductile failure mechanisms of wood from occurring. In addition, the connection provides more wood cover over the embedded steel plate, which potentially may increase the connection's fire rating as compared to typical connections. Two specimens, based on a baseline connection developed using the design procedure presented, were monotonically loaded until failure. Unlike the first specimen, the second was reinforced in the perpendicular-to-grain direction using self-tapping screws. Failure mechanisms were analyzed, and performance characteristics related to the connection's strength, stiffness, and ductility were evaluated. Results indicated that the reinforced specimen exhibited higher strength, stiffness, and ductility compared to the unreinforced specimen. The reinforced specimen showed improvements of 9.49% and 42.2% in yielding and ultimate moment, respectively, compared to the unreinforced specimen. Moreover, an improvement of 31.3% in ductility was obtained using perpendicular-to-grain reinforcement.","abstract_html":"Wood beam-column connections have traditionally been designed as simple shear connections, ignoring their potential moment capacity. A major reason for not utilizing such moment connections is linked to the brittle limit states that wood components exhibit. The purpose of this research was to develop and test a ductile and high-strength wood moment frame connection. A design procedure for such a connection is presented herein. The proposed glulam beam-column connection utilizes an embedded steel knife plate with a reduced section that acts as a ductile yield link, thus limiting the moment that can be transferred through the connection. This configuration is intended to fail through yielding of the ductile link, thus preventing non-ductile failure mechanisms of wood from occurring. In addition, the connection provides more wood cover over the embedded steel plate, which potentially may increase the connection's fire rating as compared to typical connections. Two specimens, based on a baseline connection developed using the design procedure presented, were monotonically loaded until failure. Unlike the first specimen, the second was reinforced in the perpendicular-to-grain direction using self-tapping screws. Failure mechanisms were analyzed, and performance characteristics related to the connection's strength, stiffness, and ductility were evaluated. Results indicated that the reinforced specimen exhibited higher strength, stiffness, and ductility compared to the unreinforced specimen. The reinforced specimen showed improvements of 9.49% and 42.2% in yielding and ultimate moment, respectively, compared to the unreinforced specimen. Moreover, an improvement of 31.3% in ductility was obtained using perpendicular-to-grain reinforcement.","abstract_has_math":false,"creators":["Almousawi, Sayed Husain"],"institution":"Virginia Tech","degree_name":"Master of Science","degree_level":"masters","degree_discipline":"Civil Engineering","degree_department":"Civil and Environmental Engineering","school":null,"contributors":[],"advisors":[],"committee_chairs":["Eatherton, Matthew R."],"committee_members":["Hindman, Daniel P.","Hebdon, Matthew H."],"year":2018,"date_issued":"2018-08-17","date_published":"2018-08-17","updated_at":"2026-07-24T05:56:30Z","subjects":["Glulam Moment Connection","Yield Link","Ductility","Stiffness"],"languages":[],"rights":["In Copyright"],"rights_urls":["http://rightsstatements.org/vocab/InC/1.0/"],"identifier_entries":[{"key":"dc:identifier.other","label":"Dc Identifier Other","values":["vt_gsexam:16671"],"render_values":[{"text":"vt_gsexam:16671","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/10919/84849","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.committeechair","label":"Committee Chair","values":["Eatherton, Matthew R."]},{"key":"dc:contributor.committeemember","label":"Committee Member","values":["Hindman, Daniel P.","Hebdon, Matthew H."]},{"key":"dc:contributor.department","label":"Department","values":["Civil and Environmental Engineering"]},{"key":"dc:creator","label":"Author","values":["Almousawi, Sayed Husain"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2018-08-17T16:17:12Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2018-08-17T16:17:12Z"]},{"key":"dc:date.issued","label":"Date","values":["2018-08-17"]},{"key":"dc:publisher","label":"Institution","values":["Virginia Tech"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Civil Engineering"]},{"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":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Glulam Moment Connection","Yield Link","Ductility","Stiffness"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"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":["vt_gsexam:16671"]},{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/10919/84849"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["Wood beam-column connections have traditionally been designed as simple shear connections, ignoring their potential moment capacity. A major reason for not utilizing such moment connections is linked to the brittle limit states that wood components exhibit. The purpose of this research was to develop and test a ductile and high-strength wood moment frame connection. A design procedure for such a connection is presented herein. The proposed glulam beam-column connection utilizes an embedded steel knife plate with a reduced section that acts as a ductile yield link, thus limiting the moment that can be transferred through the connection. This configuration is intended to fail through yielding of the ductile link, thus preventing non-ductile failure mechanisms of wood from occurring. In addition, the connection provides more wood cover over the embedded steel plate, which potentially may increase the connection's fire rating as compared to typical connections. Two specimens, based on a baseline connection developed using the design procedure presented, were monotonically loaded until failure. Unlike the first specimen, the second was reinforced in the perpendicular-to-grain direction using self-tapping screws. Failure mechanisms were analyzed, and performance characteristics related to the connection's strength, stiffness, and ductility were evaluated. Results indicated that the reinforced specimen exhibited higher strength, stiffness, and ductility compared to the unreinforced specimen. The reinforced specimen showed improvements of 9.49% and 42.2% in yielding and ultimate moment, respectively, compared to the unreinforced specimen. Moreover, an improvement of 31.3% in ductility was obtained using perpendicular-to-grain reinforcement."]},{"key":"dc:description.abstractgeneral","label":"General Abstract","values":["Due to the variability of wood properties and its brittle behavior, the joints of wood buildings have traditionally been designed to resist gravity loads only. These types of loads result in predictable behavior of structural wood members at the joints, which helps in simplifying the design process. However, when wood structures are subjected to lateral loads, such as earthquake and wind loads, their joints are likely to fail abruptly as the building sways, resulting in sudden, unpredictable collapse. The purpose of this research was to develop and test a high-strength wood structural joint that can fail gradually and predictably. A design procedure for such a joint is presented herein. The proposed glue-laminated wood joint utilizes an embedded steel plate with a reduced section that acts as a ductile link. This configuration is intended to fail through gradual deformation of the ductile link, thus preventing brittle wood failure at the joint. In addition, this joint provides more wood cover over the embedded steel plate, which potentially may increase the fire resistance of the joint compared to typical configurations. Two specimens, based on a baseline joint developed using the design procedure presented, were subjected to slowly-increasing loads until failure. Unlike the first specimen, the second specimen was reinforced in the direction perpendicular to wood grain using long screws to prevent separation of wood layers. Failure mechanisms were analyzed, and the performance characteristics of the two specimens were evaluated and compared. Results indicated that the reinforced specimen exhibited higher strength and improved ductility at failure."]},{"key":"dc:description.degree","label":"Dc Description Degree","values":["Master of Science"]},{"key":"dc:format.medium","label":"Dc Format Medium","values":["ETD"]},{"key":"dc:title","label":"Title","values":["Application of Ductile Yield Link in Glulam Moment Connections"]}]}],"canonical_facts":{"dc:contributor.committeechair":["Eatherton, Matthew R."],"dc:contributor.committeemember":["Hindman, Daniel P.","Hebdon, Matthew H."],"dc:contributor.department":["Civil and Environmental Engineering"],"dc:creator":["Almousawi, Sayed Husain"],"dc:date.accessioned":["2018-08-17T16:17:12Z"],"dc:date.available":["2018-08-17T16:17:12Z"],"dc:date.issued":["2018-08-17"],"dc:description.abstract":["Wood beam-column connections have traditionally been designed as simple shear connections, ignoring their potential moment capacity. A major reason for not utilizing such moment connections is linked to the brittle limit states that wood components exhibit. The purpose of this research was to develop and test a ductile and high-strength wood moment frame connection. A design procedure for such a connection is presented herein. The proposed glulam beam-column connection utilizes an embedded steel knife plate with a reduced section that acts as a ductile yield link, thus limiting the moment that can be transferred through the connection. This configuration is intended to fail through yielding of the ductile link, thus preventing non-ductile failure mechanisms of wood from occurring. In addition, the connection provides more wood cover over the embedded steel plate, which potentially may increase the connection's fire rating as compared to typical connections. Two specimens, based on a baseline connection developed using the design procedure presented, were monotonically loaded until failure. Unlike the first specimen, the second was reinforced in the perpendicular-to-grain direction using self-tapping screws. Failure mechanisms were analyzed, and performance characteristics related to the connection's strength, stiffness, and ductility were evaluated. Results indicated that the reinforced specimen exhibited higher strength, stiffness, and ductility compared to the unreinforced specimen. The reinforced specimen showed improvements of 9.49% and 42.2% in yielding and ultimate moment, respectively, compared to the unreinforced specimen. Moreover, an improvement of 31.3% in ductility was obtained using perpendicular-to-grain reinforcement."],"dc:description.abstractgeneral":["Due to the variability of wood properties and its brittle behavior, the joints of wood buildings have traditionally been designed to resist gravity loads only. These types of loads result in predictable behavior of structural wood members at the joints, which helps in simplifying the design process. However, when wood structures are subjected to lateral loads, such as earthquake and wind loads, their joints are likely to fail abruptly as the building sways, resulting in sudden, unpredictable collapse. The purpose of this research was to develop and test a high-strength wood structural joint that can fail gradually and predictably. A design procedure for such a joint is presented herein. The proposed glue-laminated wood joint utilizes an embedded steel plate with a reduced section that acts as a ductile link. This configuration is intended to fail through gradual deformation of the ductile link, thus preventing brittle wood failure at the joint. In addition, this joint provides more wood cover over the embedded steel plate, which potentially may increase the fire resistance of the joint compared to typical configurations. Two specimens, based on a baseline joint developed using the design procedure presented, were subjected to slowly-increasing loads until failure. Unlike the first specimen, the second specimen was reinforced in the direction perpendicular to wood grain using long screws to prevent separation of wood layers. Failure mechanisms were analyzed, and the performance characteristics of the two specimens were evaluated and compared. Results indicated that the reinforced specimen exhibited higher strength and improved ductility at failure."],"dc:description.degree":["Master of Science"],"dc:format.medium":["ETD"],"dc:identifier.other":["vt_gsexam:16671"],"dc:identifier.uri":["http://hdl.handle.net/10919/84849"],"dc:publisher":["Virginia Tech"],"dc:rights":["In Copyright"],"dc:rights.uri":["http://rightsstatements.org/vocab/InC/1.0/"],"dc:subject":["Glulam Moment Connection","Yield Link","Ductility","Stiffness"],"dc:title":["Application of Ductile Yield Link in Glulam Moment Connections"],"dc:type":["Thesis"],"thesis:degree_discipline":["Civil Engineering"],"thesis:degree_level":["masters"],"thesis:degree_name":["Master of Science"],"thesis:institution_name":["Virginia Polytechnic Institute and State University"]},"updated_at":"2026-07-24T05:56:30Z"}