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Hysteretic behavior and parametric studies of a self-centering shear wall with tension-compression disc spring devices
Soil Dynamics and Earthquake Engineering ( IF 4 ) Pub Date : 2021-08-11 , DOI: 10.1016/j.soildyn.2021.106929
Yan Zhang 1 , Longhe Xu 1
Affiliation  

In order to achieve an earthquake-resilient structure, this study proposes a novel self-centering shear wall with disc spring devices (SCSW-DSDs). Cyclic loading tests were conducted on a conventional wall and an SCSW-DSD. Results indicate the satisfactory self-centering performance of the new wall, yet the initial stiffness and bearing capability of the current SCSW-DSD were significantly decreased compared to those of the conventional wall. Therefore, a compression-tension disc spring device (TCDSD) was designed to enhance the initial stiffness and bearing capacity of the SCSW. The establishment of the TCDSD equivalent spring systems allowed us to calculate the macro parameters of the device. The hysteretic behavior of both the TCDSD and SCSW-TCDSD were investigated under cyclic loadings. The TCDSD was observed to exhibit an asymmetric flag-shaped hysteretic response. Furthermore, the initial stiffness and bearing capacity of the SCSW-TCDSD were increased by approximately 25% compared to the previous SCSW-DSD. The increase in the first and second stiffness, as well as the pre-pressure and friction, can improve the bearing capacity of the wall. However, the residual displacement will inevitably increase with these four parameters, particularly the friction. Moreover, increasing the friction resulted in the greatest improvements in the SCSW-TCDSD energy dissipation capability.



中文翻译:

带拉压盘簧装置的自定心剪力墙的滞回特性及参数研究

为了实现抗震结构,本研究提出了一种带有碟形弹簧装置的新型自定心剪力墙(SCSW-DSD)。循环加载测试是在传统墙和 SCSW-DSD 上进行的。结果表明,新墙具有令人满意的自定心性能,但与传统墙相比,当前 SCSW-DSD 的初始刚度和承载能力显着降低。因此,设计了一种压缩-拉伸盘簧装置(TCDSD)来提高 SCSW 的初始刚度和承载能力。TCDSD等效弹簧系统的建立使我们能够计算设备的宏观参数。在循环载荷下研究了 TCDSD 和 SCSW-TCDSD 的滞后行为。观察到 TCDSD 表现出不对称的旗形滞后响应。此外,与之前的 SCSW-DSD 相比,SCSW-TCDSD 的初始刚度和承载能力增加了约 25%。增加一阶和二阶刚度,以及预压和摩擦,可以提高墙体的承载能力。但是,随着这四个参数,特别是摩擦力,残余位移不可避免地会增加。此外,增加摩擦导致 SCSW-TCDSD 能量耗散能力的最大改进。可以提高墙体的承载力。但是,随着这四个参数,特别是摩擦力,残余位移不可避免地会增加。此外,增加摩擦导致 SCSW-TCDSD 能量耗散能力的最大改进。可以提高墙体的承载力。但是,随着这四个参数,特别是摩擦力,残余位移不可避免地会增加。此外,增加摩擦导致 SCSW-TCDSD 能量耗散能力的最大改进。

更新日期:2021-08-11
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