【摘要】 为了研究轻钢结构加层中节点加固后的抗震性能,设计制作了一个传统植筋节点和2种不同材料强化节点进行拟静力试验,对3种不同形式的加层中节点的破坏现象、滞回曲线、骨架曲线、刚度退化、耗能能力以及2种材料的强度利用率等进行了分析研究.研究结果表明:3个轻钢结构加层节点的破坏形态均为梁铰破坏,这2种新型节点的抗震性能均优于传统植筋节点,其中外包钢强化节点的滞回曲线最为饱满,耗能能力最强,承载力最高;碳纤维强化节点能够延缓节点的开裂.更多还原

【Abstract】 In order to study the seismic behavior of the strengthened medium nodes between adding steel story and concrete frame,the pseudo-static tests were carried out among the three types of nodes strengthened by traditional plant steel,carbon fiber sheet and encased steel separately.Performance of the three specimens was evaluated in terms of failure phenomena,hysteretic curves,skeleton curves,stiffness degradation,energy dissipation and efficiency of the two strengthening materials.Results show that all joints failures are due to the plastic hinges formed at the end of the beams;the seismic performance of the two new types of joints strengthened by encased steel and carbon fiber sheet is better than the traditional plant steel one,and the hysteresis curve envelope area of outer steel plate strengthening joint is the biggest,and its energy consumption capacity and bearing capacity are the most powerful;the node strengthened by carbon fiber sheet can slow down the speed of cracking.更多还原