引用本文: 王秋维, 史庆轩, 姜维山. 型钢混凝土偏心受压柱的二阶效应分析[J]. 力学与实践, 2011, 33(3): 34-37.
THE SECOND-ORDER EFFECT OF SRC COLUMNS UNDER ECCENTRIC COMPRESSION[J]. MECHANICS IN ENGINEERING, 2011, 33(3): 34-37.
 Citation: THE SECOND-ORDER EFFECT OF SRC COLUMNS UNDER ECCENTRIC COMPRESSION[J]. MECHANICS IN ENGINEERING, 2011, 33(3): 34-37.

## THE SECOND-ORDER EFFECT OF SRC COLUMNS UNDER ECCENTRIC COMPRESSION

• 摘要: 由于型钢增加了柱的侧移刚度, 型钢混凝土(SRC)柱的二阶变形因此比钢筋混凝土柱明显减小, 其偏心距增大系数已不能采用规范数值. 在理论分析的基础上, 提出SRC柱偏心距增大系数的两种求解方法, 并以柱的受力特性为依据, 采用以极限曲率为参数的偏心距增大法推导建立了计算公式. 总结国内其他学者在此方面的研究成果, 算例比较表明, 所建议公式与已有公式的最大误差小于10\%, 其精度较高且便于使用, 可为工程计算和规范修订提供参考.

Abstract: The secondary deformation of steel reinforced concrete(SRC) columns is much smaller than that of RC columns because of the useof section steel, andthe current bias distance increase coefficient in Chinese design codeis not suitable for composite columns. On the basis of theoreticalanalysis, two methods for calculating the bias distance increasecoefficient are proposed, and formula about the coefficient is obtainedby using the eccentricity increase method with the ultimate curvature asthe main parameterbased on the mechanical characteristics of SRC columns. Other \eta expressions are summarized, and an example ispresented with the maximum error of less than10\% between the suggested and other available formulas, which thusindicates that the proposed formula has a high precision.

/

• 分享
• 用微信扫码二维码

分享至好友和朋友圈