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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。
In order to study the seismic performance of SRHC FRP frame, the test of one-two-span and three-story SRHC frame under constant axial pressure and reciprocating horizontal load was carried out. The failure mode was observed and the load of frame specimen - Displacement Hysteresis Curves, the failure mechanism, hysteretic behavior, ductility, energy dissipation capacity, strength and stiffness degeneration of the SRC frame are analyzed. The experimental results show that the failure mechanism of the beam hinge is basically achieved. Under the condition of axial compression ratio as high as 0.38, the hysteresis curve of the specimen is round and full with the displacement ductility coefficient of 4.32-6.06. The equivalent viscosity at the ultimate failure The hysteresis damping coefficient reaches 0.295. The degradation of the strength and stiffness of the frame specimens is gentle, which shows that the specimens have good deformation performance and energy dissipation capacity. That is, the seismic behavior of SRC frames is excellent.