Numerical Evaluation of Through Plate Beam to Box Column Connection

摘要

Box column is used as one of the most desirable sections between the designers in Iran and mostAsian countries .this section as column has considerable benefits such as high biaxial bendingstrength and higher plastic to elastic section modulus ratio which is an effective factor for forcecontrolled components .In typical beam to column connection for this type of column section ,one need to provide horizontal continuity plates in box section which is challenge in constructionphase and there is no chance to provide them in hot rolled box section .This paper elucidates the seismic behavior of through-plates moment connections to boxcolumns for use in steel moment resisting frames. This connection has lot of economical benefitssuch as no need to horizontal continuity plates and satisfying the weak beam-strong columncriteria in the connection region .they might serve as panel zone plates as well.According to high shear demand in panel zone of beam to column joint one should use thedoublers plates in order to decrease the shear demand in this sensitive part of structure but thisplates have no possibility to mobilize the load transfer mechanism in column web and transferthem to column flanges.Finite element analysis was conducted to elucidate the seismic behavior of this connection; theresults of finite element analysis established the effectiveness of the through plate in mitigatinglocal stress concentrations and forming the plastic hinge zone in the beam away from the beam tocolumn interface. The moment rotation hystersis graphs from sub-assemblage show a desirableseismic performance of this connection .the seismic behavior of this connection also has beeninvestigated in diamond box columns.