玄武岩纤维包裹约束装配式防屈曲支撑性能试验研究

发布时间：2018-07-14 22:27

【摘要】：采用玄武岩纤维包裹约束的装配式防屈曲支撑不仅震后易于拆解修复,而且外包纤维布解决了外包钢管耐腐蚀性差的问题。对4个该类防屈曲支撑进行了拟静力试验研究,分析结果表明:玄武岩纤维包裹约束的装配式防屈曲支撑具有良好的滞回性能,在循环加载过程中基本未出现刚度与承载力的退化现象,且延性与耗能能力良好。防屈曲支撑受压时内核单元发生多波屈曲,内核单元施加的侧向推力导致约束单元中起包裹约束作用的玄武岩纤维发生变形,由于内核单元与约束单元之间的间隙增加,从而进一步加剧内核单元的多波屈曲,在防屈曲支撑滞回曲线上表现为受压阶段曲线的"跳动"。试件的最终破坏发生在内核单元屈服段的中间部位或屈服段与非屈服段的连接处;玄武岩纤维布约束效果良好,通过包裹纤维布可以将装配式防屈曲支撑两部分约束单元进行很好的组装。
[Abstract]:The prefabricated buckling braces with basalt fiber enclosing constraints are not only easy to disassemble and repair after earthquake, but also solve the problem of poor corrosion resistance of steel pipes. The quasi-static test of four kinds of buckling braces is carried out. The results show that the fabricated anti-buckling braces with basalt fiber encased in buckling have good hysteretic performance. In the process of cyclic loading, there is no degradation of stiffness and bearing capacity, and the ductility and energy dissipation capacity are good. The multi-wave buckling occurs in the core element when the buckling bracing is under compression, and the lateral thrust applied by the core element causes the deformation of the confined basalt fiber in the confinement element, which is due to the increase of the gap between the kernel element and the confinement element. Thus, the multi-wave buckling of the core element is further aggravated, and the hysteretic curve of anti-buckling bracing appears as the "runout" of the compression phase curve. The ultimate failure of the specimen occurs in the middle part of the yield section of the core element or at the junction between the yield section and the non-yielding section, and the binding effect of the basalt fiber cloth is good. The two-part restraint elements of the assembled buckling braces can be well assembled by wrapping the fiber cloth.
【作者单位】：哈尔滨工业大学结构工程灾变与控制教育部重点实验室;
【基金】：黑龙江省留学归国人员科学基金项目(40000045-6-15455) 哈尔滨市科技创新人才基金项目(2013RFQXJ122)
【分类号】：TU398.9

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