论文标题：Experimental study on seismic behavior of L-shaped-section steel reinforced high-strength concrete shear walls for core tube of super-tall buildings

期刊：Frontiers of Structural and Civil Engineering

作者：Qiang ZHANG, Bin ZHAO, Linyuan MA, Xilin Lu, Xiangyong NI, Kun DING, Jianlong ZHOU

发表时间：12 Dec 2024

DOI：10.1007/s11709-025-1163-x

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文章亮点/Highlights

高强度混凝土与型钢组合成复合剪力墙构件，可解决高层和超高层建筑底部核心筒剪力墙截面过大的问题。然而，现有研究多集中于矩形截面剪力墙，对L形截面剪力墙的研究较为不足。

为深入探究L形截面钢骨高强混凝土（立方体抗压强度≥60MPa）剪力墙（LSRHCW）的抗震性能，本研究对4个不同尺寸、配筋率和混凝土强度的试件在高轴压比（n = 0.5）下进行循环加载试验，加载方向与墙肢长度方向呈45°夹角。

试验结果表明：在高轴压比下，试件因混凝土压碎导致强度退化而发生弯剪破坏，但表现出优异的变形性能（最大位移角达3.03%）。采用不同混凝土强度和型钢配筋率的试件具有相当的承载力、变形能力和初始刚度。这表明，通过提高混凝土强度可有效降低LSRHCW的配筋率，同时保持其抗震性能。

型钢应变及试件C80-L纵向钢筋：（a）应变片位置;（b）截面拐角型钢;（c）应变片位置;（d）型钢在一个自由端;（e）应变片位置;（f）另一端的型钢;（g）应变片位置;（h）一个自由端的纵向钢筋

摘要/Abstract

High-strength concrete and shape steel are combined to form composite shear wall members to address the cross-section oversize of core tube shear walls at the bottom of tall and super-tall buildings. However, the existing investigation focus on rectangular shear walls, and insufficient study has been conducted on L-shaped shear walls. To better understand the seismic performance of L-shaped-section steel reinforced high-strength concrete (fcu ≥ 60 MPa) shear walls (LSRHCW), four such specimens with distinct dimensions, reinforcement ratios and concrete strengths were tested under cyclic loading and high axial compression ratio (n = 0.5), and the lateral cyclic loading direction makes an angle of 45° with the wall limb length direction. The influence of improving concrete strength and reducing the steel and reinforcement ratios on the seismic performance is investigated. The results show that under high axial compression ratio, the specimens fail in flexure-shear mode due to strength reduction caused by concrete crushing, and exhibit excellent deformation performance (maximum drift ratio capacity, 3.03%). The wall specimens built with different strength concrete and shape steel ratios demonstrate comparable strength, deformation and initial stiffness. This suggests that the reinforcement ratio of LSRHCWs can be effectively reduced by upgrading concrete strength, while still maintaining their seismic performance.

关键词/Keywords

L-shaped-section steel reinforced high-strength concrete shear walls; loading direction; seismic performance; cyclic loading test; high axial compression ratio

引用信息/Citation Information

Qiang ZHANG, Bin ZHAO, Linyuan MA, Xilin Lu, Xiangyong NI, Kun DING, Jianlong ZHOU. Experimental study on seismic behavior of L-shaped-section steel reinforced high-strength concrete shear walls for core tube of super-tall buildings. Front. Struct. Civ. Eng., 2025, 19(5): 681–698 https://doi.org/10.1007/s11709-025-1163-x

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https://doi.org/10.1007/s11709-025-1163-x

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