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为研究黏滞阻尼器腋撑对钢筋混凝土框架结构抗震性能的影响,设计制作了带黏滞阻尼器腋撑的钢筋混凝土框架模型和普通框架模型各1榀,对其进行水平正弦稳态激励荷载作用下的抗震性能试验,研究了两榀框架的滞回特性、耗能能力以及关键测点应变等。试验结果表明:设置黏滞阻尼器腋撑框架的滞回曲线较普通框架饱满,结构的耗能能力及附加阻尼比显著提高;激振频率变化对两榀框架的滞回特性以及钢筋应变影响较小;设置黏滞阻尼器腋撑可较大幅度降低梁柱节点处的内力,延缓框架柱顶塑性铰的产生和发展,有效地保护梁柱节点,改善钢筋混凝土框架的抗震性能,但黏滞阻尼器腋撑加大了梁柱加腋处及柱脚的内力;带黏滞阻尼器腋撑钢筋混凝土框架和普通框架均为柱脚塑性铰发展严重而破坏。
In order to study the influence of viscous damper armpit on the seismic performance of reinforced concrete frame structure, a reinforced concrete frame model with viscous damper armpit and a common frame model were designed and fabricated, respectively, and their horizontal sinusoidal steady-state excitation loads Under the action of the earthquake resistance test, study the hysteresis frame two horsepower characteristics, energy consumption capacity and key measuring point strain and so on. The experimental results show that the hysteresis curve of the viscous damper armpit frame is more plentiful than that of the ordinary frame, and the energy dissipation capacity and additional damping ratio of the structure are significantly increased. The influence of the excitation frequency on the hysteretic behavior and the strain of the rebar frame The viscoelasticity of axillary brace can greatly reduce the internal force of beam-column joints and delay the generation and development of plastic hinges at the top of frame columns, effectively protect the joints of beam-column and column, and improve the seismic performance of reinforced concrete frame, Damper axillary increased beam column plus axillary and column foot internal forces; with viscous damper armpit reinforced concrete frame and common frame are columnar plastic hinge development and destruction.