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Cyclic tests on a hybrid coupled wall utilizing a rocking mechanism

机译:利用摇摆机制对混合耦合墙进行循环测试

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A new type of hybrid coupled wall system, consisting of rolled steel coupling beams, reinforced concrete (RC) wall piers, and concrete-filled tube (CFT) short columns, is introduced. In this new system, the bases of the wall piers are connected to the base beams only through CFT short columns, unlike conventional coupled walls. Yield occurs in the coupling beams and the short columns; hence, in the RC wall piers, only minimum cracking appears. A total of four subassembly specimens, designed to fail in various collapse mechanisms, were cyclically loaded under constant axial force. A benchmark specimen showed ductile behavior with large energy dissipation until fracture occurred in the coupling beam. In the specimen designed to fail in shear in its CFT, substantial axial shortening was observed, but the overall behavior was ductile. Behavior of specimens with small amounts of section steel in the wall panel fringe, or with thin wall panels, also showed ductile behavior, but the strength and energy dissipation were significantly smaller than other two specimens. An analytical model was proposed for a frame analysis program using fiber elements to simulate elastic-plastic behavior of the system. Design methods to prevent shear failure of CFT and RC panels are suggested using the analytical and test results.
机译:介绍了一种新型的混合耦合墙系统,该系统由轧钢耦合梁,钢筋混凝土(RC)墙墩和混凝土填充管(CFT)短柱组成。在这种新系统中,与传统的耦合墙不同,墙墩的底部仅通过CFT短柱连接到基础梁。屈服发生在耦合梁和短柱上。因此,在RC墙墩中,仅出现最小的裂缝。在恒定的轴向力作用下,周期性地加载了总共四个子组件样本,这些样本旨在在各种坍塌机制中失效。基准试样显示出具有大能量耗散的延性行为,直到耦合梁发生断裂。在设计成在其CFT中剪切失败的样品中,观察到了明显的轴向缩短,但总体行为是延性的。壁板边缘带有少量型钢或薄壁板的试样的行为也显示出延性,但强度和能量耗散显着小于其他两个试样。为框架分析程序提出了一个分析模型,该程序使用纤维元素来模拟系统的弹塑性行为。通过分析和测试结果,提出了防止CFT和RC面板剪切破坏的设计方法。

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