細長い合成柱の設計式

概要

論文の詳細を見る
The researches on the strength of long composite columns and design formulas for them are reviewed, and a new design method for them is proposed. As the new method is based on the additive theory, it is simple and has the advantage that two independent design formulas can be used for the design of steel portion and reinforced concrete portion. Strength of a centrally loaded composite column is obtained from Eq. (1). Ultimate strength and allowable capacity of a beam-column are obtained from Eqs. (8) and (9), and Eqs. (12) and (13), respectively. If there is moment gradient in the longitudinal direction due to the difference of end moments, Eqs. (8) and (9) are modified to Eqs. (14) and (15), respectively. In chapter 4, the strength of composite columns with cross sections shown in Fig. 3 by mean of the proposed method are compared with exact values from theoretical analysis. The results are shown in Figs. 5 to 7 for centrally loaded columns, Fig. 10 to 12 for eccentrically loaded columns, and Fig. 13 for eccentrically loaded columns with moment gradient, respectively. The experimental results by Stevens are compared with the strengths by means of the proposed formulas in Fig. 14. Proposed formulas by Dowling et al and Roik et al are compared with that in this paper in Fig. 15. As shown in the figures, errors involved in the proposed formulas are in the safe side and reasonably small.
社団法人日本建築学会の論文
1979-04-30