EXPERIMENTAL AND NUMERICAL STUDY OF I-SHAPE SLIT DAMPERS IN CONNECTIONS
ABSTRACT THIS PAPER PROPOSES A NEW BEAM TO COLUMN CONNECTION WHICH HAS SLIT DAMPERS TO INCREASE DUCTILITY AND MOMENT CAPACITY OF STRUCTURES. AFTER NORTHRIDGE AND KOBE EARTHQUAKES, MANY RESEARCHERS HAVE TRIED TO ACHIEVE MORE DUCTILE CONNECTIONS. DUCTILITY OF CONNECTIONS CAUSES TO DISSIPATE MORE ENERGY BEFORE FAILURE OF CONNECTIONS. ALSO, SOME RESEARCHERS HAVE TRIED TO FIND METHODS THAT PLASTIC HINGE OCCURS OUT OF BEAM TO COLUMN CONNECTION ZONE. PROPOSED DETAIL CONNECTS BEAM TO COLUMN BY TWO I-SHAPE SLIT DAMPERS. ONE EXPERIMENTAL SPECIMEN OF THE PROPOSED CONNECTION WAS TESTED UNDER CYCLIC LOADING. BASED ON THE EXPERIMENTAL RESULTS, THE CONNECTION HAS HIGH SEISMIC PERFORMANCE AND ROTATIONAL CAPACITY MORE THAN 0.04 RADIANS. ALSO, THE SLIT DAMPER CONNECTION HAS MORE MOMENT CAPACITY THAN OTHER COMMON CONNECTIONS AND INDICATES A GOOD HYSTERETIC BEHAVIOR. EXPERIMENTAL OBSERVATIONS SHOWED THAT NO CRACKS AND FRACTURES OCCURRED IN WELDS AND HIGH ENERGY ABSORPTION OF SLIT DAMPERS PREVENTED DAMAGES OF OTHER PARTS. ALSO, LOCAL BUCKLING DIDN’T OCCURRED ON THE FLANGES AND WEB OF THE BEAM. COLUMN AND BEAM REMAIN IN ELASTIC STATE. SOME NUMERICAL MODELS WERE MADE IN ABAQUS SOFTWARE. ANALYSIS RESULTS HAD GOOD AGREEMENT WITH EXPERIMENTAL RESULTS AND SHOWED HIGH ENERGY DISSIPATION AND DUCTILITY IN THE PROPOSED CONNECTION.
Authors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).