EVALUATION OF MOMENT REDISTRIBUTION （评价力矩再分配）.pdfVIP

th The 14 World Conference on Earthquake Engineering October 12-17, 2008, Beijing, China EVALUATION OF MOMENT REDISTRIBUTION DEMAND IN CONTINUOUS CONSTRUCTIONS UNDER GRAVITY AND SEISMIC LOADS 1 2 M.S. Marefat and M.Sh. Farzanian 1 Professor, Dept. of Civil Engineering, University of Tehran, Tehran, Iran 2 M.Sc. Student of Earthquake Engineering, University of Tehran, Tehran, Iran Email: mmarefat@ut.ac.ir, shafee_f@ ABSTRACT: In the current practices of structural design, the concept of moment redistribution in conjunction with linear analysis is well known and widely accepted. There are numerous studies and various references that deal with the issue and different codes propose various provisions for the amount of permissible redistribution. Despite numerous advantages, there are some limitations in the available work about this subject. Nearly all of these studies are restricted to symmetric multi span continuous beams subjected to static gravity load. In reality, continuous beams lie in the structural frames, symmetric configuration may not happen, and more importantly, lateral load also exist. Most of available works assume that a single plastic hinge to form at the center of joints while this study suggests that two distinct plastic hinges to take shape on both sides of an internal support of a frame. Consequently, relevant conclusions of available works suffer serious limitations and shortcomings. In this study, a continuous frame structure is considered, the effect of lateral load has been taken into a