發(fā)布時間：2019-01-10 12:37

【摘要】：提出了一種基于高階矩法的結構溫度統(tǒng)計方法,可避免傳統(tǒng)方法擬合曲線求分布的不確定性,計算效率、精度高.基于我國華東一高鐵橋梁長期監(jiān)測數(shù)據(jù),將箱梁和軌道作為整體,計算了其豎、橫向溫度和溫差代表值,分析了溫度云圖和溫差分布規(guī)律,研究了軌道結構對箱梁表面溫度的遮蓋效應.研究表明:結構年溫度樣本屬中變異,分布規(guī)律平穩(wěn);高溫標準值分別為35.4℃,38.15℃,豎向最大高溫梯度分別為10.33℃,12.93℃;混凝土豎向有效導熱長度約為60 cm,軌道遮蓋可降低箱梁表面溫度4.4℃.
[Abstract]:A structure temperature statistics method based on high-order moment method is proposed, which can avoid the uncertainty of the distribution of the fitting curve by the traditional method, and has the advantages of high efficiency and high precision. Based on the long-term monitoring data of a high-speed railway bridge in East China, the vertical, transverse temperature and temperature difference representative values of box girder and track are calculated, and the temperature cloud map and temperature difference distribution law are analyzed. The covering effect of track structure on surface temperature of box girder is studied. The results show that the annual structural temperature samples belong to medium variation and steady distribution, the standard values of high temperature are 35.4 鈩，

本文編號：2406316