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Parametric analysis and new design formulas of a prefabricated energy-dissipating composite slotted shear wall

机译：预制能量消散复合型剪力墙的参数分析和新设计公式

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摘要

In a conventional wall frame system, shear walls typically exhibit less deformation capacity under earthquakes than the frame. In this study, an innovative prefabricated slotted composite shear wall was proposed, abbreviated as CDSW. Featured with concrete-filled-tube (CFT) wall segments, I-shaped steel connectors, vertical slots and bolted connections with the frame, the CDSW has significantly improved deformation capacity, energy dissipation capacity and construction efficiency compared with conventional shear walls. Its seismic behaviors were investigated through applying quasi-static cyclic loads, where the specimen exhibited satisfactory cyclic response. Based on the test results, finite element analysis (FEA) models were established to validate the test results, and 12 parametric FEA cases were conducted to optimize the parameters of CDSWs. A new design method of a CDSW with highly accurate formulas was proposed based on a new parameter termed as equivalent stiffness ratio (ESR). With ESR, the stiffness and internal force of a CDSW can be obtained with satisfactory precision. Based on the analytical result and the new design formulas, it can be concluded that the ESR between 0.706 and 1.25 is recommended for practical engineering applications, which took into consideration the governing factors of yield and peak strength, stiffness, deformation capacity and energy dissipation. Additionally, the installation of the upper and lower sets of connectors at about 40% and 60% of the height of CDSW is suggested, respectively.
机译：在传统的壁框架系统中，剪切壁通常比框架在地震下表现出更少的变形容量。在本研究中，提出了一种创新的预制开槽复合剪力墙，缩写为CDSW。用混凝土填充管（CFT）壁段，I形钢连接器，垂直槽和与框架的螺栓连接，与传统剪切墙相比，CDSW的变形容量显着提高了变形容量，能量耗散能力和施工效率。通过施加准静态循环载荷来研究其地震行为，标本表现出令人满意的环响应。基于测试结果，建立了有限元分析（FEA）模型以验证测试结果，并进行了12例参数化FEA病例以优化CDSWS的参数。基于作为等效刚度比（ESR）称为高精度公式的CDSW的新设计方法。通过ESR，可以以令人满意的精度获得CDSW的刚度和内力。基于分析结果和新的设计公式，可以得出结论，建议对实际工程应用的ESR为0.706和1.25，这考虑了产量和峰值强度，刚度，变形能力和能量耗散的控制因素。另外，提出了大约40％和60％的CDSW的高度和下层连接器的上下连接器的安装。

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