高延性纤维混凝土短柱抗震性能试验研究

发布时间：2018-01-04 01:07

本文关键词：高延性纤维混凝土短柱抗震性能试验研究　出处：《建筑结构学报》2015年12期 　论文类型：期刊论文

【摘要】：为研究高延性纤维混凝土短柱的抗震性能和变形能力,设计了5个剪跨比为2的高延性纤维混凝土短柱和1个作为对比试件的钢筋混凝土短柱,通过拟静力试验,研究其破坏形态、变形能力及耗能能力。试验结果表明:高延性纤维混凝土短柱破坏时,剪切斜裂缝开展缓慢,高延性纤维混凝土的受拉应变硬化和多裂缝开展性能可有效控制剪切斜裂缝的开展,显著改善短柱的脆性剪切破坏模式;与钢筋混凝土短柱相比,高延性纤维混凝土短柱的刚度退化缓慢,承载力、延性和耗能能力均明显提高;高延性纤维混凝土短柱的开裂、屈服和极限位移明显高于钢筋混凝土短柱,表明采用高延性纤维混凝土可显著提高短柱的剪切变形能力,提高其抗震性能和耐损伤能力。
[Abstract]:To study on the seismic behavior of fiber reinforced concrete short columns with high ductility and deformation capacity, design 5 shear span ratio is 2 high ductility fiber reinforced concrete short columns and 1 for comparison specimens of reinforced concrete short column, the quasi-static test on the failure pattern, deformation capacity and energy dissipation capacity. Experimental results show that high ductility fiber reinforced concrete short column failure, shear crack slow, high ductility fiber reinforced concrete tensile strain hardening and cracking performance can effectively control of cracks, improve the brittle shear failure mode of short column; compared with the reinforced concrete short column, high ductility fiber reinforced concrete short column stiffness the rate of degradation is slow, bearing capacity, ductility and energy dissipation capacity were improved; cracking of high ductile fiber reinforced concrete short column, yield and limit displacement was significantly higher than that of reinforced concrete short columns, show that the high ductility of fiber concrete. The shear deformation ability of the short column can be improved remarkably, and the seismic performance and the damage resistance ability of the short column can be improved.

【作者单位】：西安建筑科技大学土木工程学院;
【基金】：国家自然科学基金项目(51578445) 西安市科技计划项目(CX13135-3)
【分类号】：TU375.3
【正文快照】： 0引言钢筋混凝土短柱作为结构设计中的竖向承重构件之一,在水平荷载作用下以剪切变形为主,表现出明显的脆性特征,在持续水平地震作用下耗能不足,给结构震后修复带来困难。因此,改善钢筋混凝土短柱,尤其是高强混凝土短柱的变形能力,避免其发生脆性剪切破坏,对控制结构的地震损

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