【摘要】：以滬昆高速鐵路某槽形梁斜拉橋?yàn)楣こ瘫尘?根據(jù)傳熱學(xué)和太陽物理學(xué)等相關(guān)理論,建立槽形梁橫斷面熱力學(xué)分析模型,研究槽形梁內(nèi)部的溫度分布規(guī)律,探討各類參數(shù)的影響,在此基礎(chǔ)上提出日照作用下槽形梁橫斷面上溫度分布模式。分析發(fā)現(xiàn):不同時(shí)刻、大氣透明度系數(shù)、混凝土表面輻射吸收率及梁高雖然會(huì)引起槽形梁溫度場(chǎng)變化,但對(duì)槽形梁的豎向溫差模式影響不大;槽形梁溫差模式可按兩部分進(jìn)行擬合,截面頂緣溫差22℃,采用指數(shù)函數(shù)和線性函數(shù)相結(jié)合模式進(jìn)行擬合;下緣最大溫差4℃,并線性變化至0℃。
[Abstract]:Based on the engineering background of a cable-stayed bridge with slot beam in Hu-Kun high speed railway, a thermodynamic analysis model of cross-section of groove beam is established according to the theories of heat transfer and solar physics, and the temperature distribution law of the groove beam is studied. On the basis of discussing the influence of various parameters, a model of temperature distribution on the cross section of grooved beam under sunshine is put forward. It is found that the atmospheric transparency coefficient, the radiation absorption rate of concrete surface and the beam height at different times will cause the change of the temperature field of the grooved beam, but have little effect on the vertical temperature difference mode of the grooved beam. The temperature difference model of the grooved beam can be fitted by two parts. The temperature difference at the top edge of the section is 22 鈩，

本文編號(hào)：2198239