郑山锁, 甘传磊, 秦卿, 杨威, 汪锋. 冻融循环后一字形短肢剪力墙抗震性能试验研究[J]. 工程力学, 2016, 33(12): 94-103,111. DOI: 10.6052/j.issn.1000-4750.2015.04.0283
引用本文: 郑山锁, 甘传磊, 秦卿, 杨威, 汪锋. 冻融循环后一字形短肢剪力墙抗震性能试验研究[J]. 工程力学, 2016, 33(12): 94-103,111. DOI: 10.6052/j.issn.1000-4750.2015.04.0283
ZHENG Shan-suo, GAN Chuan-lei, QIN Qing, YANG Wei, WANG Feng. EXPERIMENTAL STUDY ON THE SEISMIC BEHAVIOR OF SHORT-PIER SHEAR WALLS SUBJECTED TO FREEZE-THAW CYCLES[J]. Engineering Mechanics, 2016, 33(12): 94-103,111. DOI: 10.6052/j.issn.1000-4750.2015.04.0283
Citation: ZHENG Shan-suo, GAN Chuan-lei, QIN Qing, YANG Wei, WANG Feng. EXPERIMENTAL STUDY ON THE SEISMIC BEHAVIOR OF SHORT-PIER SHEAR WALLS SUBJECTED TO FREEZE-THAW CYCLES[J]. Engineering Mechanics, 2016, 33(12): 94-103,111. DOI: 10.6052/j.issn.1000-4750.2015.04.0283

冻融循环后一字形短肢剪力墙抗震性能试验研究

EXPERIMENTAL STUDY ON THE SEISMIC BEHAVIOR OF SHORT-PIER SHEAR WALLS SUBJECTED TO FREEZE-THAW CYCLES

  • 摘要: 为了研究冻融循环作用、混凝土强度和轴压比对一字形短肢剪力墙抗震性能的影响,探讨冻融环境下一字形短肢剪力墙的轴压比限值,设计制作了6个剪跨比为1.14的一字形短肢剪力墙试件并对其进行了200次循环的人工气候冻融试验,进而进行拟静力试验。基于试验描述了各试件的破坏过程与特征,并以抗剪承载力、延性系数、塑性转角、强度衰减、刚度退化和累积滞回耗能等指标为参数,分析了冻融环境下一字形短肢剪力墙抗震性能的衰减规律。试验结果表明:冻融循环作用对一字形短肢剪力墙的抗剪承载力、强度衰减、刚度退化和耗能能力影响较为显著,而对其变形能力影响较小;冻融循环次数不变,增大混凝土强度可有效增强一字形短肢剪力墙构件的抗冻性能,提高其抗震能力;冻融环境下,应严格控制一字形短肢剪力墙构件的轴压比。

     

    Abstract: To study the influence of freeze-thaw cycles, the concrete strength grade and axial compression ratio on the seismic behavior of short-pier shear walls (SPWs) with rectangular sections and investigate the limits of axial compression ratio of SPWs, 6 SPW specimens with shear span ratio of 1.14 were subjected to 200 freeze-thaw cycles in artificial climate room before quasi-static tests were conducted. Based on the experimental results, the failure process and patterns of the SPW specimens are described. Six performance indicators, that is, the load-carrying capacity, ductility, plastic rotation, strength deterioration, stiffness degradation and cumulative hysteretic energy dissipation, are used to evaluate the deterioration law of the seismic behavior of SPW. The results show that the freeze-thaw cycles have a great effect on the load-carrying capacity, strength deterioration, stiffness degradation and cumulative hysteretic energy dissipation of SPWs, whereas the deformation capacity of SPWs is less influenced by the freeze-thaw cycles. While the number of freeze-thaw cycles remains the same, increasing the strength grade of concrete can enhance the frost resistance and improve the seismic behavior of SPWs. In freeze-thaw environment, the axial compression ratio of SPWs should be strictly controlled.

     

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