混凝土核心筒的水平双向循环加载试验研究

Experimental Study on the Behavior of Concrete Core Wall under Biaxially Cyclic Loadings

为了研究地震多维性对于混凝土核心筒抗震性能的影响,对大尺寸混凝土核心筒试件进行了水平双向加载下的拟静力试验。重点研究在双向加载下,核心筒的破坏形态与机理、承载能力、变形性能、刚度退化等方面的问题。结果表明,由于水平双向加载下筒体一个方向的损伤影响到另一个方向的性能,因而对混凝土核心筒的抗震能力造成不利影响。因此,在实际工程中应合理地考虑这种影响,这对于确保混凝土核心筒的抗震安全具有重要意义。

In order to investigate the behavior of concrete core walls under multi-dimensional seismic motions, a large scaled specimen of concrete core wall, subjected to horizontally biaxial loadings, is tested quasi-statically, to study its failure pattern and mechanism, as well as the load-carrying capacity, deformation ability, stiffness degradation, etc. The test results show that, because of the obvious effect of the damage of the core wall resulted liom horizontal loadings in one direction on its performance when loaded in another direction, biaxial loading condition adversely affects the seismic behavior of the concrete core wall. Therefore, consideration of such influence in engineering practice is important for seismic safety of concrete core walls.