混凝土与水泥制品
混凝土與水泥製品
혼응토여수니제품
CHINA CONCRETE AND CEMENT PRODUCTS
2013年
8期
48-50
,共3页
刘永连%卢哲安%袁晓辉%常佳伟
劉永連%盧哲安%袁曉輝%常佳偉
류영련%로철안%원효휘%상가위
SFRC%疲劳强度%灰色系统理论%灰色自回归模型
SFRC%疲勞彊度%灰色繫統理論%灰色自迴歸模型
SFRC%피로강도%회색계통이론%회색자회귀모형
Steel fiber reinforced concrete%Fatigue strength%Gray system theory%Gray-autoregressive model
影响混凝土疲劳强度因素的不确定性使材料在最薄弱环节容易造成局部损伤破坏,最终导致整个材料的破坏。因此,随机预测具有一定的现实意义。通过灰色自回归模型和GM(1,1)模型预测钢纤维混凝土(SFRC)弯曲疲劳强度试验值,分析两种方法的预测精度的高低。结果表明,灰色自回归模型预测精度比GM(1,1)模型的精度较高。
影響混凝土疲勞彊度因素的不確定性使材料在最薄弱環節容易造成跼部損傷破壞,最終導緻整箇材料的破壞。因此,隨機預測具有一定的現實意義。通過灰色自迴歸模型和GM(1,1)模型預測鋼纖維混凝土(SFRC)彎麯疲勞彊度試驗值,分析兩種方法的預測精度的高低。結果錶明,灰色自迴歸模型預測精度比GM(1,1)模型的精度較高。
영향혼응토피로강도인소적불학정성사재료재최박약배절용역조성국부손상파배,최종도치정개재료적파배。인차,수궤예측구유일정적현실의의。통과회색자회귀모형화GM(1,1)모형예측강섬유혼응토(SFRC)만곡피로강도시험치,분석량충방법적예측정도적고저。결과표명,회색자회귀모형예측정도비GM(1,1)모형적정도교고。
Uncertainty of the factors that affect the fatigue strength of concrete is likely to cause local damage and failure in the weakest link of material, eventually leading to the destruction of the entire material. Therefore, the random prediction of fatigue strength of concrete has practical significance. The bending fatigue strength of SFRC is calculated by the gray autoregressive model and GM (1,1) model. Meanwhile, the forecast accuracy of the two models is analyzed by comparing with the calculated values. The results show that forecast precision of gray-autoregressive model is higher than that of GM(1,1)model.