2012/11/22 6.4.5 strong ioints-weak members (1)Design of beam-column joints (2)Design value of shear force -会 登-） (3)Seismic shearstrength checking of joint core 6.4.6 Lateral defection evaluation (b)Shear strength checking of beam-column joint ment should be limited -nA+05,g+L,52 64切 2） 548 Au.=[o (2cnderre 5 Aoygaeeaaleestcphc 651 9 2012/11/22 9 6.4.5 strong joints-weak members (1) Design of beam-column joints  The design of beam-column joints is primarily aimed at: (i) preserving the integrity of the joint so that the strength and deformation capacity of the connected beams and columns can be developed and substantially maintained. (ii) preventing significant degradation of the joint stiffness due to cracking of the joint and loss of bond between concrete and the longitudinal column and beam reinforcement or anchorage failure of beam reinforcement.                c b b o s b s b jb j H h h a h a M V / / 0 1 (5.41)               c b b o s b s bua j H h h a h a M V / / 0 1 1.15 (5.42) (2) Design value of shear force (b) Shear strength checking of beam-column joint             s h a f A b b V f b h N b s yv svj c j j t j j j RE j 0 1.1 0.5 1    5.47 (3) Seismic shear strength checking of joint core          s h a V f b h f A b s j t j j yv svj RE j 0 0.9 1   5.48 6.4.6 Lateral deflection evaluation • Drift, or inter-story displacement should be limited (causes non-structural damage and human discomfort and secondary stress in the main structure) • To provent the structure collapsed. (1) Checking elastic floor drifts under frequently accured earthquake, (2) Checking plastic fl oor drifts under r are accured earthquake, A simplified equation to calculate elastic-plastic story drift is the follows: u p   p  h (5.50) u p  pue (5.51) ue  e h