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钢筋混凝土柱中使用钢纤维,可以帮助改善在地震激励作用下柱的抗破裂性。在性能试验中准备了8根构件,用于评估钢纤维对于钢筋混凝土柱的剪切强度和行为的加固作用。该项研究中采用的变量是钢纤维的体积分数(例如:0·0%,1·0%1·5%和2·0%)和抗剪钢筋的名义比率(例如0·26%和0·21%)。从试验结果可以看到,抗剪能力增加最大的达到了1·5%的钢纤维体积分数。为了预测这些柱子的最大抗剪强度,Hirosawa和Priestley提出了剪切强度计算公式,评价和应用了ACI318-99,AIJMB和NZS3101中的剪切强度公式。通过参数和退化的分析,对Priestley公式进了修正,包含了钢纤维加固的作用。最后,这个公被用于预测加入了钢纤维的钢筋混凝土柱的抗剪力。
The use of steel fibers in reinforced concrete columns can help to improve the column's crack resistance under earthquake excitation. In the performance test, eight components were prepared to evaluate the reinforcing effect of steel fiber on the shear strength and behavior of reinforced concrete columns. The variables used in this study were the volume fraction of steel fibers (eg, 0 · 0%, 1.0% 1.5% and 2.0%) and the nominal ratio of shear reinforcement (eg 0.26% and 0 ·twenty one%). As can be seen from the test results, the maximum increase in shear resistance reached 1.5% of the steel fiber volume fraction. In order to predict the maximum shear strength of these columns, Hirosawa and Priestley proposed the shear strength calculation formula and evaluated and applied the shear strength formulas in ACI 318-99, AIJMB and NZS3101. Through the analysis of parameters and degradation, Priestley formula was amended to include the role of steel fiber reinforcement. Finally, this utility model was used to predict the shear strength of reinforced concrete columns with steel fibers.