型钢混凝土异形柱正截面承载力简化计算方法

Simplified Calculation Method for Normal Section Bearing Capacity of Steel Reinforced Concrete Special-Shaped Columns

为简化型钢混凝土异形柱正截面承载力计算方法,基于低周反复加载试验,分析构件的压弯性能,将复杂截面进行简化,提出计算方法.型钢混凝土异形柱在压弯作用下,破坏主要发生在与水平加载方向平行的柱肢.基于此,保留主要受力柱肢,简化或忽略次要受力柱肢,将异形截面转化为矩形截面,并针对实腹式和空腹式配钢的构件分别提出正截面承载力计算公式,计算结果与试验结果吻合较好.研究表明,基于简化截面的型钢混凝土异形柱正截面承载力计算方法简单、快捷,满足精度要求,便于工程设计应用.

In order to simplify the calculation method for the normal section bearing capacity of steel reinforced concrete special-shaped columns,the bending properties were analyzed according to low cyclic repeated loading tests,the complex sections was simplified,and the calculation method was proposed. Under axial compression load and bending moment,the failure zone of steel reinforced concrete special-shaped columns was on the column limb parallel to the horizontal loading direction. Therefore,the special-shaped sections were changed to rectangular sections by retaining the limb which bore the loads mainly and simplifying or neglecting another limb. The calculation formulas were put forward for the columns with solid-steel and latticesteel,respectively. The calculation results and the experimental results agreed well. It can be seen that the calculation method for normal section bearing capacity based on simplified section is simple and quick,and has high calculation precision,so that it can be applied for the engineering design.