横方向変位を考慮したRC偏心軸圧縮部材(短柱)の耐力の逓減係数に関する研究

抄録

It is desirable to examine the validity of a proposed method, if possible, from a different standpoint. In the present study, the strength of RC-member in a short column supported laterally at both ends was calculated under an axial load at a given eccentricity by a simple method of neglecting an effect of lateral deformation of the member, and the result was compared with that by a usual method of considering its effect. Consequently, it is proposed that the reduction factor of the strength by a simple method, in which the variations in strength of both reinforcing bars and concrete were taken into account, is adequete for compressive failure but should be reduced for tensile failure. Also, the upper limit of slender ratio of the member should be reduced to 21 instead of 35 which is provided in the JSCE-Code, if the reduction foctor of 1/1.15 provided in the Code is applied in the whole range of eccentricity.