型钢高强混凝土短柱承载力非线性分析

为了研究型钢高强混凝土短柱的性能,对具有不同型钢截面尺寸、混凝土强度等级和配箍率的型钢高强混凝土短柱进行了非线性分析.考虑矩形箍筋和型钢翼缘对核心区混凝土的约束作用,将截面划分为非限制性混凝土、半限制性混凝土、限制性混凝土、钢筋和钢骨5部分,分别采用不同的应力应变曲线.程序计算结果与试验结果吻合良好.

Non-linear analysis of bearing capacity of SRHC short columns

The effects of the steel ratio, the stirrup ratio, and the strength of concrete on bearing capacity of columns were analyzed in order to study the behavior of steel reinforced high-strength concrete short-columns. The concrete confinement provided by lateral ties and structural steel section flanges was considered. The composite steel-concrete cross section was assumed to consist of five different materials, each represented by a different stress-strain curve. These materials included the unconfined concrete outside the transverse tie reinforcement, the partially confined concrete with the transverse ties, confined concrete with the structural steel section flanges, the longitudinal reinforcement, and the sturctural steel section. The results of numerical analysis by the proposed method correlate well with the results of the tests.