钢骨混凝土L形柱抗震性能试验研究

Lab research on seismic behavior of steel reinforced concrete L-shaped column

对4个钢骨混凝土(SRC)L形柱试件进行低周反复加载试验,观察了两种不同配钢形式的钢骨混凝土L形柱在沿工程轴方向加载和斜向加载的受力全过程和破坏形态.分析了钢骨混凝土L形柱的破坏特点,给出了荷载-位移滞回曲线、承载力、位移延性、刚度退化和耗能能力等力学性能.试验研究结果表明:当剪跨比较大时(λ≥2.44),钢骨混凝土L形柱发生弯曲型破坏,破坏主要表现为斜向加载时角部混凝土压碎、正向加载时腹板端部混凝土压碎,滞回曲线不对称,试件延性好,极限侧移角大,具有良好的抗震耗能能力.

According to a research on 4 specimens of steel reinforced concrete （SRC） L-shaped column under low cyclic reversed loading, the failure process and patterns were obtained. The failure characteristics, mechanical behaviors of SRC L-shaped column such as the loading -displacement hysteretic curves, bearing capacity, displacement ductility, rigidity degradation and energy dissipation are analyzed. The experimental study indicates that the major failures of SRC L-shaped column （λ≥2.44） are flexural failure, and the destruction mainly occurs in the part of the cross section ,under the right angle loading is web, and under oblique loading is corner. The hysteretic curves of SRC L-shaped column are unsymmetrical and plump. The specimens have good ductility and large rotation capacity, presenting excellent seismic behavior.