混凝土梁侧锚固钢板受压屈曲特性的数值模拟

发布时间：2018-01-07 00:16

本文关键词：混凝土梁侧锚固钢板受压屈曲特性的数值模拟　出处：《同济大学学报(自然科学版)》2017年01期 　论文类型：期刊论文

【摘要】：采用ABAQUS软件进行参数分析,研究了梁侧锚固钢板加固混凝土梁中钢板屈曲特性受不同屈曲限制措施的影响及其变化规律.结果表明:受压钢板屈曲特性对初始几何缺陷不敏感;增大钢板厚度能提高试件屈曲承载力;减小钢板受压区螺栓间距和配置截面更大的纵向加劲肋不仅能有效提高屈曲承载力,还能有效约束侧向起拱;配置横向加劲肋对提高屈曲承载力无明显效果;纵向加劲肋对屈曲承载力的加强效果可分解为加劲肋自身屈服承载力及其对受压钢板的屈曲约束两部分,并可通过拟合公式较准确地进行计算.
[Abstract]:Parameter analysis was carried out by using ABAQUS software, to study the effects of different buckling restrictions buckling characteristics of concrete beam reinforcement steel beam side plate anchorage and its variation. The results show that the compression plate buckling characteristics is not sensitive to initial geometric imperfections; increasing the thickness of the steel plate can improve the buckling capacity; longitudinal stiffener plate decreases compression bolt the spacing and configuration of larger sections not only can effectively improve the buckling bearing capacity, can effectively restrict lateral arch configuration; transverse stiffener had no obvious effect on improving the buckling bearing capacity; longitudinal stiffeners on the buckling bearing capacity of strengthening effect can be decomposed into its stiffener yield strength and buckling constraints on the two part of the pressure plate. And through the fitting formula accurately calculated.

【作者单位】：同济大学土木工程学院;
【基金】：国家自然科学基金(51378397);国家自然科学基金青年科学基金(51408436)
【分类号】：TU375.1
【正文快照】： 在目前既有钢筋混凝土梁的加固方法中,应用最广泛的有梁底粘钢和粘碳纤维法.这两种方法对配筋率较低的梁可起到较好的加固效果,但对配筋率较高的梁将导致超筋破坏[1-2],而且在钢板或碳纤维片材端部往往发生脆性剥离.而采用植筋式锚栓或膨胀螺栓将钢板锚固在混凝土梁两侧的方法

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