两跨三层型钢超高强混凝土框架抗震性能试验研究

摘要

In order to investigate the seismic behavior of steel reinforced high strength concrete (SRHSC) frame ,a speci-men of three-story and two-bay SRHSC frame was tested under constant static vertical loads and low reversed cyclic lateral loads .The failure condition of the experimental frame specimen was observed .The load-displacement hysteretic curves of frame specimen were obtained .The failure mechanism ,hysteretic behavior ,ductility ,energy dissipation capacity , strength and stiffness degeneration were investigated .The test results indicate that the beam hinge failure mechanism is achieved .SRHSC frame ,even if subjected to large axial load with an axial load ratio of 0 .38 ,may still have rich and stable hysteretic load - displacement curves .The specimen ductility coefficients of SRHSC frame range from 4 .17 ~5 .72 ,and the coefficient of equivalent viscous damping reaches 0 .295 when the specimen is damaged .The strength and stiffness degenerates gradually ,which shows that the specimen has excellent seismic behavior with sufficient ductility and high energy dissipation capacity .%为研究型钢超高强混凝土框架的抗震性能，在恒定轴向压力和往复水平荷载作用下对一榀两跨三层的型钢超高强混凝土框架进行试验研究，观测其破坏形态，得到框架试件的荷载—位移滞回曲线，分析了型钢超高强混凝土框架的破坏机制、滞回性能、延性、耗能能力、强度及刚度退化等力学性能。结果表明：本框架试件基本实现了梁铰破坏机制，在试验轴压比高达0．38的条件下，试件的滞回曲线圆润饱满，位移延性系数为4．32～6．06，极限破坏时的等效黏滞阻尼系数达到0．295，框架试件的强度和刚度退化较为平缓，说明其具有良好的变形性能和耗能能力，即型钢超高强混凝土框架的抗震性能优良。