带PEC柱的钢框架结构Pushover分析

对于多高层建筑而言，部分外包混凝土柱（PEC柱）是非常理想的边缘约束构件。为探究带PEC柱钢框架结构的力学性能，采用OpenSees有限元软件建立8层及12层共12个带PEC柱钢框架结构模型算例并进行Pushover分析。通过软件模拟分析，得到PEC柱内填混凝土等级和型钢板件的厚度变化对整体结构力学性能各个指标的影响。分析表明，在型钢钢柱中灌入混凝土提高了结构的抗侧刚度、延性及承载能力，PEC柱相关参数的变化对结构底部的影响程度大于结构顶部。

Pushover Analysis of Steel Frame Structure with PEC Columns

For high-rise buildings, partially encased concrete columns (PEC columns) are ideal edge restraint members. In order to explore the structural mechanical properties of steel frame structure with PEC columns, 12 models of steel frame structure with PEC columns on 8 floors and 12 floors are established by using OpenSees finite element software, and Pushover analysis is carried out. Through software simulation analysis, the effects of the grade of concrete filled in PEC column and the thickness of section steel plate on the mechanical properties of the overall structure are obtained. The analysis shows that pouring concrete into the section steel column improves the lateral stiffness, ductility and bearing capacity of the structure, and the influence of the change of relevant parameters of PEC column on the bottom of the structure is greater than that on the top of the structure.