Z形截面钢筋混凝土偏压柱的简化设计方法
- 摘 要
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申冬建 (河北农业大学城建院 保定 071001)陈云霞 赵艳静 (天津大学土木系 天津 300072)[提要] 通过对Z形截面偏压柱及中长柱的计算机理论分析,探讨了在不同轴压比下Z形截面柱Mx-M。关系以及荷载角与截面中和轴之间的关系。研究了在不同荷载角、长细比以及相对偏心距时,偏压柱的基本变形规律,提出了用偏心距增人系数来进行设计的方法,并给出了偏心距增人系数的计算公式。与方形柱的对比表明,Z形柱截面高宽比为1.0-1.3时受力较为合理。
[关键词] Z形截面柱 设计方法偏心距增人系数
Bascd on the computcr thcorctical analysis for short and slcndcr Z-shapcd R C columns, the Mx - My rclationships of columns for diffcrcnt comprcssion ratios as wcll as the rclationships bcrwccn loading angtcs and ncutral axis anglcs of cross scction arc invcstigatcd. The gcncral bchaviors of columns for diffcrcnt loading anglcs and slcndcrncss ratios, ccccntricity ratios arc studicd.A dcsign proccdure using the ccccntricity magnification factor is proposcd, and the formula of ccccntricity magnification factor is givcn. It is shown by the comparison bctwccn the square columns and Z-shapcd columns that the rational ratio of hcight and width for Z-shapcd columns is1.0~1.3.
Keywords: Z-shapcd cross scction columns; dcsign proccdurc; ccccntricity magnification factor