L形部分包覆钢-混凝土组合柱设计及应用

Design and Application of L-shaped Partially-encased Composite Steel-concrete Columns

因L形部分包覆钢-混凝土组合柱设有成熟的承载力计算公式,根据国内外相关研究成果,计算钢贡献率、轴压比后,利用Xtract软件建立计算模型,绘制4种角度的轴力-弯矩曲线,并验算L形PEC柱双向压弯稳定承载力与受剪承载力。在东升和府10号楼项目中,通过承载力验算,采用轴力-弯矩曲线包络设计法,计算L形柱Z4,Z5的最不利工况,符合规范,使高层住宅中避免出现凸梁凸柱的情况。

Due to the lack of a mature method to calculate the bearing capacity of the L-shaped partially covered steel-concrete composite column, this study used Xtract software to create a calculation model after calculating its steel contribution rate and axial compression ratio. Different P-M curves from four different angles were derived to test the stability and shear capacity of the L-shaped PEC columns under bidirectional compression and bending, and the results were applied to the Dongsheng Hefu Building No. 10 project. The P-M curve envelope design approach was used to compute the L-shaped columns Z4 and Z5 under the most unfavorable situations to fulfill the standards, avoiding the use of convex beams and columns in high-rise residential buildings.