间断螺栓连接双波形钢板剪力墙抗震性能研究
Seismic Performance Study of Double-Corrugated Steel Plate Shear Walls with Intermittently Bolted Connections
波形钢板剪力墙凭借独特的几何结构,具备优异的承载力与耗能性能,但小位移加载阶段极易产生开裂,连接方式与几何参数对其抗震性能的影响规律有待深入研究。文中设计了2个采用间断螺栓连接的对扣式双波形钢板剪力墙试件,通过拟静力试验,重点研究其失效机制与滞回性能。利用ABAQUS有限元软件建立了10种不同波形参数的全壳单元模型,并引入初始缺陷,系统分析该新型剪力墙体系在不同波形参数下的抗震响应规律。结果表明:该剪力墙体系具备良好的抗侧承载力,在层间位移角达到2.4%时试件仍未出现裂缝,展现出优异的耗能与滞回性能,可支撑“小震无损,中震不坏,大震可替换”的抗震设计目标;螺栓连接区域的波形钢板腰部易发生局部屈曲,而无螺栓连接的腹板区域则以扭转屈曲为主要变形模式。数值分析表明,不同参数下结构的抗剪承载力最大可提升34%;减小波形腹宽可提升结构的抗侧刚度、承载力及加载前中期耗能能力;降低波高可显著提升结构的抗侧刚度和承载力,而大波高试件在大范围位移表现出更佳的耗能性能。该研究结果可为双波形钢板剪力墙的结构优化设计与实际应用提供关键支撑,有助于提升结构在强震作用下的安全性和耐久性。
Corrugated steel plate shear walls, with their unique geometry, exhibit excellent load-bearing and energy-dissipation capacities. However, they are prone to cracking under small displacement loading, and the effects of connection methods and geometric parameters on seismic performance remain unclear. In this study, two double-corrugated steel plate shear walls with intermittently bolted connections were designed, and quasi-static tests were conducted to investigate their failure mechanisms and seismic performance. Finite element analysis was performed using ABAQUS to simulate and design ten full-shell-element models with different waveform parameters and initial defects. The seismic behavior of this shear wall system was systematically evaluated under various waveform configurations. The high agreement between the experimental data and simulation results validated the accuracy and reliability of the finite element model. The results show that the shear wall system has high lateral load-bearing capacity, with no cracking observed at a drift angle of up to 2.4%. It demonstrates superior energy dissipation capacity and hysteretic behavior, promising to advance the seismic design philosophy of "no damage under frequent earthquakes, repairable under design earthquakes, and replaceable under rare earthquakes.". Local buckling is prone to occur in the waist region of bolted areas, while torsional buckling is more common in the unbolted web areas. Parametric analysis reveals that the ultimate shear capacity can be increased by up to 34% under varying structural configurations. Reducing the corrugation width enhances lateral stiffness, load-bearing capacity, and early-to-mid-stage energy dissipation capacity, while decreasing the wave height improves lateral stiffness and load-bearing capacity. Structures with larger wave heights show better energy dissipation capacity at larger displacements. This research provides critical support for the optimization and practical application of double-corrugated steel plate shear walls, thereby enhancing structural safety and durability under strong seismic conditions.
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国家自然科学基金(52108177)
宁波市国际科技合作项目(2023H008)
宁波市重点研发计划项目(2022Z165)
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