o_09_bm_clmn_jnt - 1.054/1.541 Mechanics and Design of...

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1.054/1.541 Mechanics and Design of Concrete Structures Spring 2004 Prof. Oral Buyukozturk 1 / 9 Massachusetts Institute of Technology 1.054/1.541 Mechanics and Design of Concrete Structures (3-0-9) Outline 9 Beam Column Joints Importance of joint behavior o Weak link theory o Deterioration mechanisms o Detailing Monolithic beam-column joints o In the design with the philosophy of limit states it is seen that joints are often weakest links in a structural system. o The knowledge of joint behavior and of existing detailing practice is in need of much improvement. o Joint behavior is especially critical for structures subject to earthquake effects. o The shear forces developed as a result of such an excitation should be safely transferred through joints. The R/C system should be designed as a “ductile system”. Design of joints o Joint types Type I – Static loading Æ strength important Æ ductility secondary Type II – Earthquake and blast loading Æ ductility + strength Æ inelastic range of deformation
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