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Cyclic performance for low-yield point steel plate shear walls with diagonal T-shaped-stiffener
Journal of Constructional Steel Research ( IF 4.1 ) Pub Date : 2020-08-01 , DOI: 10.1016/j.jcsr.2020.106163
Meng Wang , Xiaokang Zhang , Lu Yang , Weiguo Yang

Abstract A novel dual lateral force resisting system consisting of low-yield point steel plate shear walls with diagonal T-shaped-stiffener (LSPSW-DTS) was proposed as a promising alternative to improve the buckling stability, seismic behavior, and serviceability of SPSWs. The influence of several key factors on the cyclic performance, failure behavior, and plate–frame interaction characteristics was evaluated using numerical investigations. The optimum configuration of stiffeners was determined to achieve a material-efficient design. The critical values of the column flexibility coefficient were determined to ensure sufficient development of the tension fields inside the infill panel. Finally, the contribution of the boundary frame was quantified by establishing an equation for predicting the proportional shear resistance of the infill panels. The analytical results demonstrated that the hysteresis curves, shear capacity, and energy dissipation of all the overall structure, infill panel, and boundary frame enhanced as the flexural stiffness ratios of the stiffeners increased, demonstrating that the DTS significantly improved both the cyclic performance of LSPSW structures and the plate-frame interaction. In addition, the plates of the stiffeners did not experience adverse local instability, indicating the advantages of the T-shaped stiffeners. However, once the flexural stiffness ratio of the stiffeners was sufficiently large, an additional increase in the degree of stiffening had only minor positive effects on the shear capacity and energy dissipation performance. A larger flexural stiffness ratio was required for larger width-to-height ratios, height-to-thickness ratios, or column flexibility coefficients to obtain the expected failure modes and achieve satisfactory shear capacity efficiency and energy dissipation efficiency.

中文翻译:

带斜T形加劲肋的低屈服点钢板剪力墙循环性能

摘要 提出了一种新型的双侧向抗力系统,该系统由带对角 T 形加劲肋的低屈服点钢板剪力墙 (LSPSW-DTS) 组成,作为提高 SPSW 屈曲稳定性、抗震性能和适用性的有前景的替代方案。使用数值研究评估了几个关键因素对循环性能、失效行为和板框架相互作用特性的影响。确定加强筋的最佳配置以实现材料高效设计。确定柱挠度系数的临界值以确保填充板内的张力场充分发展。最后,通过建立用于预测填充板的比例抗剪强度的方程来量化边界框架的贡献。分析结果表明,随着加强筋弯曲刚度比的增加,所有整体结构、填充板和边界框架的滞后曲线、抗剪能力和能量耗散都得到增强,表明 DTS 显着提高了 LSPSW 的循环性能结构和板框相互作用。此外,加强筋的板没有出现不利的局部失稳,表明了 T 形加强筋的优势。然而,一旦加强筋的弯曲刚度比足够大,加强程度的额外增加对抗剪能力和能量耗散性能只有很小的积极影响。较大的宽高比、高厚比、
更新日期:2020-08-01
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