本文選題：航道整治 + 橋梁��； 參考：《水運工程》2017年10期

【摘要】：近年來隨著航道等級的提升,設(shè)計通航船舶尺度增大,要求的通航凈空尺度增加,橋區(qū)通航水域條件發(fā)生顯著變化。橋梁存在船撞風(fēng)險,需對船撞橋梁風(fēng)險實施評估、為實施防撞設(shè)施工程提供依據(jù)。國內(nèi)外因船舶撞擊而導(dǎo)致橋梁垮塌或嚴(yán)重破壞的事故逐漸增多,平均每年就有一座大型橋梁因為船舶撞擊而遭受嚴(yán)重破壞甚至倒塌。北江航道烏石至三水河口航段經(jīng)整治由Ⅳ級提升為Ⅲ級后,橋梁存在船撞風(fēng)險。以船撞橋概率模型(AASHTO)為研究方法,分析了整治河段清遠(yuǎn)北江二橋參數(shù)對船撞橋概率的影響,計算了船舶撞擊橋梁各涉水橋墩的年撞擊概率,確定了存在較大船撞風(fēng)險的橋梁與涉水橋墩,建立了船撞橋損傷概率模型,分析橋梁各部位抗撞能力、橋梁各部位船舶撞擊力及各部位的年撞擊頻率,得出通航孔橋墩的年撞擊倒塌頻率。
[Abstract]:In recent years, with the improvement of navigation channel grade, the scale of designed navigable ship increases, the required clearance scale increases, and the conditions of navigable waters in the bridge area change significantly. There is a ship collision risk in the bridge, so it is necessary to evaluate the ship collision risk to provide the basis for the implementation of anti-collision facilities. The accidents of bridge collapse or serious damage caused by ship impact at home and abroad are increasing gradually. On average, a large bridge suffers serious damage or even collapse due to ship impact every year. After the regulation of the section from Wushi to Sanshui Estuary of Beijiang Waterway is upgraded from Grade 鈪，

本文編號：2116527