无腹筋FRP筋梁抗剪承载力定量回归分析

doi:10.19936/j.cnki.2096-8000.20220228.006

摘要/Abstract

摘要： 纤维增强聚合物复合材料(FRP)筋和普通钢筋的性能差异加大了混凝土梁抗剪性能的复杂性。对于无腹筋FRP筋梁的抗剪承载力评价方法,目前各国规范公式在影响变量的种类以及影响程度的评价上存在差异,因此基于各规范式的评价结果离散性大,且总体较试验结果偏保守。鉴于此,本文基于国内外184根无腹筋FRP筋梁试验数据的定量回归分析,提出了新的无腹筋FRP筋梁抗剪承载力计算公式。该公式系统且合理地评价了各变量的影响,评价结果较各规范公式更为合理精确。

关键词: FRP筋, 无腹筋梁, 抗剪承载力, 回归分析

Abstract: The difference in the properties between fiber reinforced polymer (FRP) bars and ordinary steel bars increases the complexity of the shear performance of concrete beams. For the evaluation approaches of the shear strength of FRP reinforced concrete beams without web reinforcements, the current different countries′ design codes differ in the influencing variables concerned and the influence degree of each variable. Thus, the evaluation results based on each design code differ a lot, and in addition, are generally conservative compared with that of the test results. To this end, based on a quantitative regression analysis on the test data of 184 FRP beams from published literature, this paper proposes a new evaluation formula for the shear strength of FRP beams without web reinforcement. This new formula systematically evaluate the effects of the influencing variables, and the evaluation results are more reasonable and accurate than that of the current code design formulas.

Key words: FRP bars, beams without web reinforcement, shear strength, regression analysis

中图分类号:

TB332

崔峻强, 薛昕. 无腹筋FRP筋梁抗剪承载力定量回归分析[J]. 复合材料科学与工程, 2022, 0(2): 38-44.

CUI Jun-qiang, XUE Xin. Regression analysis of shear strength of FRP beams without web reinforcement[J]. COMPOSITES SCIENCE AND ENGINEERING, 2022, 0(2): 38-44.

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