蜂窝状钢骨混凝土L形柱正截面承载力的试验研究

Experimental Study on Normal Section Bearing Capacity of Honeycomb Steel-Reinforced Concrete L-Shaped Column

蜂窝状钢骨混凝土L形柱,是一种特别适用于钢结构住宅建筑的新型异形柱。为了考察该新型构件的正截面受力、变形特性,本文进行了两根等肢和不等肢L形柱的单调加载试验,研究了轴心和偏心压力作用下该新型构件的受力、变形性能与破坏形态。研究结果表明,蜂窝状钢骨能增强钢骨与混凝土间的黏结能力,提高其协同工作与整体受力性能;蜂窝状钢骨的存在,提高了该新型构件的正截面承载力;该新型构件的破坏模式与相应荷载作用下钢筋混凝土柱的破坏模式相似;在荷载不超过极限荷载的80%之前,该新型构件的截面应变符合平截面假定。

Honeycomb steel-reinforced concrete L-shaped column is a new type of column,which especially suits residential buildings using steel structure.In order to investigate normal section stress and shape characteristic of this component,unidirectional loading experiment of axial and eccentric compression concerning two trial components is conducted to study the stress and shape characteristic and destructible form.The study shown that the opening hole in the web of steel skeleton can strengthen the combination of the steel and the concrete and the cooperative capacity between the steel and the concrete.Bearing capacity of the columns can be enhanced because of the existence of steel skeleton.the destructible mode of honeycomb steel-reinforced concrete L-shaped column have resemblances with that relatic loaded concrete L-shaped column.The section of this component will accord with the hypothesis of planar section until the loading has exceeded 80% of the maximum.