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Seismic performance of steel-enhanced damping concrete core walls with concealed steel plate bracings
Engineering Structures ( IF 5.5 ) Pub Date : 2020-06-01 , DOI: 10.1016/j.engstruct.2020.110564
Meng-fu Wang , Dan Luo , Zhang-qi Hu

Abstract Experimental study was conducted on six 1/6 scale steel-enhanced damping concrete composite core walls (SEDCCW) with steel plate bracings under cyclic load reversals and constant axial load, to investigate the influences of stirrups in boundary zone, layer number of X-shaped steel plate bracing, encased steel arrangements of boundary zones and coupling beams, the aspect ratio (AR) and the axial compression load ratio (ALR) on the seismic behavior of the specimens. The cracking patterns, failure modes, load-bearing capacities, ductility factors, energy dissipation capacities and shear lag effects of the specimens were discussed. Then parametric analysis was carried out on 27 numerical models based on verified finite element models to assess the influences of the ALR and the AR of specimens, span-to-depth ratios of coupling beams, the encased steel ratios of corner columns, hidden columns and coupling beams, steel ratios of wall bracings on the overall seismic performance of the SEDCCW specimens. The analysis results indicate that the SEDCCW specimens can also obtain good deformation capacity when the design axial load ratio is less than 1. 0 or span-to-depth ratio of coupling beam is larger than 1.0; the steel ratio of wall bracing is the most influential factor on load bearing capacity and deformation capacity of the SEDCCW specimens, the influence of encased steel ratios of corner columns and hidden columns on ductility of the SEDCCW specimens is greater than that of encased steel ratios of coupling beams.

中文翻译:

带隐蔽钢板支撑的钢减振混凝土核心墙的抗震性能

摘要 对6个1/6比例钢制阻尼混凝土复合芯墙(SEDCCW)钢板支撑在循环荷载反转和恒定轴向荷载下进行试验研究,研究边界区箍筋、X-层数的影响。异型钢板支撑、边界区和连梁的包钢布置、纵横比(AR)和轴向压缩载荷比(ALR)对试件抗震性能的影响。讨论了试件的开裂模式、破坏模式、承载能力、延展性因素、能量耗散能力和剪力滞效应。然后基于经过验证的有限元模型对 27 个数值模型进行参数分析,以评估试件的 ALR 和 AR、连梁跨深比、角柱、隐柱和连梁的包钢比,墙支撑的钢比对 SEDCCW 试件整体抗震性能的影响。分析结果表明,当设计轴向载荷比小于1. 0或连梁跨深比大于1.0时,SEDCCW试件也能获得良好的变形能力;墙支撑钢比是影响SEDCCW试件承载力和变形能力的最大因素,角柱和隐柱的包钢比对SEDCCW试件延性的影响大于包钢比的影响。耦合梁。分析结果表明,当设计轴向载荷比小于1. 0或连梁跨深比大于1.0时,SEDCCW试件也能获得良好的变形能力;墙支撑钢比是影响SEDCCW试件承载力和变形能力的最重要因素,角柱和隐柱包钢比对SEDCCW试件延性的影响大于包钢比对SEDCCW试件延性的影响。耦合梁。分析结果表明,当设计轴向载荷比小于1. 0或连梁跨深比大于1.0时,SEDCCW试件也能获得良好的变形能力;墙支撑钢比是影响SEDCCW试件承载力和变形能力的最重要因素,角柱和隐柱包钢比对SEDCCW试件延性的影响大于包钢比对SEDCCW试件延性的影响。耦合梁。
更新日期:2020-06-01
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