Cyclic loading test of reinforced concrete frames protected with brace-type friction dampers
Cyclic loading test of reinforced concrete frames protected with brace-type friction dampers
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DOI：
10.1177/13694332211042785
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发表时间：
2021-10
影响因子：
2.6
通讯作者：
Y. Maida;H. Sakata
中科院分区：
文献类型：
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作者：
Y. Maida;H. Sakata
在这项研究中，对带有支撑型摩擦阻尼器的钢筋混凝土（RC）门户框架进行了循环载荷测试。采用了可能重现施加在梁上的轴向力的边界条件。为了抵抗作用于RC成员的轴向力，使用通过RC成员中心插入的钢进行了阻尼连接方法。这项研究的目的是a）了解基于实验测试的阻尼器连接和带有支架型摩擦阻尼器的RC框架的行为，b）确认新连接方法的有效性。根据测试结果，提出的连接方法在RC帧中实现了有效的阻尼器连接。对于带有阻尼器的RC框架标本，可以证实阻尼器达到其滑动力，并开始在早期阶段耗散能量，故事漂移比小于RC束屈服的能量。距离板板的焊接部分和穿过RC梁中心的钢被打破。当梁内的焊接部分破裂并且梁的轴向变形增加时，阻尼器的滑动位移减少。因此，需要建立一种可靠的接合方法。
In this study, cyclic loading tests were conducted on reinforced concrete (RC) portal frames with brace-type friction dampers. The boundary conditions that could reproduce the axial forces exerted on the beams were adopted. To resist the axial force acting on the RC member, a damper connection method was employed by using steel inserted through the center of the RC member. The purpose of this study was to a) understand the behavior of the damper connection and the RC frame with brace-type friction dampers based on experimental tests and b) to confirm the effectiveness of the new connection method. According to the test results, the proposed connection method achieved effective damper connections in the RC frames. For the RC frame specimens with dampers, it was confirmed that the damper reached its sliding force and started to dissipate energy at an early stage with story drift ratios smaller than those at RC beam yielding. The welded part of the gusset plate and the steel inserted through the center of the RC beam were broken. When the welded part inside the beam broke and the axial deformation of the beam increased, the sliding displacement of the damper decreased. Therefore, a reliable jointing method of this part needs to be established.