BEHAVIOR OF COMPRESSION MEMBERS WITH TWO LATERAL BRACINGS

Abstract

The objective of this study is to clarify the influence of the slenderness ratio and bracing stiffness and le/lc on the strength and bracing forces of the compression members with two lateral bracings by using numerical analysis. The results are summarized as follows: 1) When le/lc=1.0 or λ^^-〓1.0, the maximum strength is close NcR as the bracing stiffness increases, and when le/lc<1.0 and λ^^->1.0, it exceeds NcR, where le is the unbraced length between the supporting and bracing points, lc is the unbraced length between the bracing points, λ^^- is the slenderness ratio with a buckling length of lc, and NcR is the Euler load with a buckling length of lc. 2) The bracing force is constant regardless of bracing stiffness if the bracing stiffness is sufficiently in size. When le/l=1.0, it is 0.6% of the maximum strength regardless of λ^^-. When le/lc<1.0, it increases as λ^^- increases and is more than 0.6%.