安装钢支撑框架的RC框架连接性能试验研究

Experimental Study on the Connection Performance of RC Frame with Steel Braced Frame Installation

为了提高钢筋混凝土框架的平面内强度、刚度和延性,提出了一种在现有钢筋混凝土框架内安装钢支撑框架的新型混合连接方式。对3个一层一跨的钢筋混凝土框架进行改装,分别对试样发生的框架剪切破坏行为、整体弯曲破坏行为和剪切滑移破坏行为进行设计。将改装后的框架同时在水平循环荷载和垂直恒定荷载作用下进行试验。结果表明,所提出的混合连接结构可以有效地在钢支撑框架和钢筋混凝土框架之间传递剪力,并通过夹芯钢板和高强度螺栓提高了边界钢筋混凝土柱的抗剪强度。此外,还提出了估算混合连接方式直接抗剪承载力的计算方法。

In order to increase the in-plane strength and stiffness,and ductility of reinforced concrete frame,a new hybrid connection of installing steel brace frames within existing reinforced concrete frames is proposed.Three reinforced concrete frames with one floor and one span are modified,and the frame shear failure behavior,overall bending failure,and shear slip failure behavior of the specimens are designed.The modified frame is tested under both horizontal cyclic load and vertical constant load simultaneously.The results show that the proposed hybrid connection structure can effectively transfer the shear forces between the steel brace frames and reinforced concrete frames,and improve the shear strength of boundary reinforced concrete columns through sandwich steel plates and high-strength bolts.In addition,a calculation method for estimating the direct shear bearing capacity of mixed connection methods is also proposed.