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为了研究狗骨式型钢高强混凝土(HSRC)框架边节点的抗震性能,对9个边节点试件进行低周反复荷载试验。试验结果表明:设计合理的狗骨式型钢高强混凝土框架边节点具有良好的位移延性和滞回特性;轴压比小的试件,其节点的滞回曲线较丰满,骨架曲线较平缓,延性与耗能能力相对较好;在轴压比相等或相近的情况下,对梁型钢采用狗骨式削弱的试件较普通试件具有更好的延性性能和耗能能力,位移延性系数提高幅度为10%～25%;对节点附近梁端型钢翼缘采取狗骨式削弱,能够将框架梁的塑性铰从梁端根部转移到削弱部位,从而有效地提高节点的抗震性能,达到延性设计的目的。
In order to study the seismic behavior of the edge joints of dog-bone-type steel reinforced high-strength concrete (HSRC) frame, low-cycle cyclic loading tests were carried out on the nine side-edge specimens. The test results show that the designed side-frame joints of dog-bone type steel reinforced high-strength concrete frame have good displacement ductility and hysteretic behavior. The specimens with small axial compression ratio have more hysteresis curves, more gentle curve of skeleton, ductility and The energy dissipation capacity is relatively good; when the axial compression ratio is equal or similar, the specimens with beam-bone weakened beam beams have better ductility and energy dissipation capacity than the normal specimens, the displacement ductility coefficient increases by 10% ~ 25%. The dog flange weakening of the steel flange near the node can transfer the plastic hinge of the frame beam from the root of the beam to the weakened part, so as to effectively improve the seismic performance of the node and achieve the purpose of ductility design .