CAJ | 학술논문

文章以甘肃省永古高速公路柳条河大桥为例，进行了现场温度观测；利用最小二乘法回归分析理论，拟合箱梁截面温度时程曲线，得出了基于傅里叶函数的温度时程拟合模型；选择典型时刻的实测温度，进行竖向温度分布分析，提出了竖向温度梯度拟合公式。研究结果对寒冷地区混凝土箱梁温度预测及温度应力计算具有一定的参考价值。
문장이감숙성영고고속공로류조하대교위례，진행료현장온도관측；이용최소이승법회귀분석이론，의합상량절면온도시정곡선，득출료기우부리협함수적온도시정의합모형；선택전형시각적실측온도，진행수향온도분포분석，제출료수향온도제도의합공식。연구결과대한랭지구혼응토상량온도예측급온도응력계산구유일정적삼고개치。
The Liutiao River Bridge of Yongdeng-Gulang Highway in Gansu Province was taken as an example ,and the temperature field of the bridge was observed .The least squares regression analysis theory was adopted to fit temp-time curves of the box girder bridge ,and the temp-time fitting model based on Fourier function was obtained .The observed temperatures at typical moments were selected , the vertical temperature distribution was analyzed ,and then the vertical temperature gradient fitting formulas were made .The results of the study have certain reference value in the temperature predic-tion and stress calculation of concrete box girder in the cold areas .