实腹式型钢混凝土T形柱抗震性能试验研究

为研究实腹式型钢混凝土T形柱的抗震性能，进行了10个试件的水平加载试验，考虑了加载制度、轴压比和配钢率的影响，观察了试件的受力过程和破坏形态，分析了荷载-位移曲线、侧移角、延性、强度、刚度及耗能等力学性能。结果表明，试件均发生弯曲破坏，但不同加载制度下试件的破坏形态不同；试件的滞回曲线饱满，极限侧移角介于1/36~1/9，位移延性系数介于3.97~12.11，破坏时等效粘滞阻尼系数介于0.319~0.374，体现出良好的变形和耗能能力；随着加载循环次数的增多和轴压比的增大，试件的延性降低，强度衰减和刚度退化加快；随着配钢率的增大，试件的延性提高，强度衰减和刚度退化变缓。

EXPERIMENTAL STUDY ON ASEISMIC PERFORMANCE OF SOLID STEEL REINFORCED CONCRETE T-SHAPED COLUMN

In order to investigate the aseismic performance of the solid steel reinforced concrete T-shaped column, ten specimens were tested under horizontal loading, considering various loading procedures, axial compression ratios, and steel ratios. The failure process and patterns were observed. The mechanical behaviors were analyzed, such as load-displacement curves, drift angle, ductility, loading capacity, stiffness and energy dissipation. Test results show that:bending failure occurred for all specimens, and the failure pattern is different when the load was applied to the specimen according to different loading procedures. The hysteretic loops are in a plump-shape. The maximum drift angle is between 1/36 and 1/9, the displacement ductility coefficient is between 3.97 and 12.11, and the equivalent viscous damping coefficient is about 0.319 to 0.374 as the specimen failed, indicating good capacity of deformation and energy dissipation. With the increase of the number of cyclic loading and the axial compression ratio, the ductility of the specimen is reduced, and the speed of the strength and stiffness degradation tend to fast. With the increase of steel ratio, the ductility of the specimen is improved, and the speed of the strength and stiffness degradation tend to slow.