圧縮材の支点の補剛に関する研究 : (その 1) 弾塑性解析

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In this paper, an exact analysis has been performed on the elastic plastic behavior of a pinned-end axially compressed member with an eccentricity of load e, which is laterally supported at midspan by a bracing member with elastic spring constant ratio k [Fig. 1]. The analysis is based on Newmark's numerical integration method. As a consequence of the consideration of the analytical results for numerical examples, the following conclusions have been obtained. 1. The bracing stiffness ratio k [Eq.(3)] require the values greater than unity when the axial compressive strength of main members is expected to attain Jezek's approximate strength P_<cr> [Eq.(5)] for eccentrically loaded columns. 2. The values of the bracing force F_<cr> corresponding to the column strength P_<cr> are generally on the decrease as the values of the bracing stiffness ratio k increase, and they tend to converge in the region of k=3〜5. However, the above relation is not applicable to short length members such as λ=20〜40. It is rather remarkable that the inverse relation exists for these members [Fig.5]. 3. The values of the bracing force F_<cr> at P_<cr> increase as the values of eccentricity of load for main members increase. For practical inperfect members with the initial eccentricity [Eq.(4)] they do not exceed 2% of P_<cr> under condition k>3. However, they exceed greatly 2% of P_<cr> on the case of short length members with the large values of eccentricity of load.
社団法人日本建築学会の論文
1973-03-30

圧縮材の支点の補剛に関する研究 : (その 1) 弾塑性解析

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