泰州大桥中间塔鞍座抗滑安全评估  

Anti-sliding safety assessment for main saddle on middle tower of Taizhou Bridge

作　　者：阮欣[1] 阮静[2] 陈艾荣[1] 郭济[1] 

机构地区：[1]同济大学桥梁工程系,上海200092 [2]江苏省长江公路大桥建设指挥部,泰州225321

出　　处：《中国工程科学》2012年第5期71-74,共4页Strategic Study of CAE

基　　金：国家科技支撑计划资助项目(2009BAG15B02);交通运输部2008年度省部联合攻关项目(2008-353-332-170);国家自然科学基金资助项目(51108338)

摘　　要：在分析鞍座抗滑机理的基础上,建立了基于最大静摩擦系数的三塔悬索桥中间塔鞍座抗滑基本评估模型,并发展了多种鞍座抗滑评估方法。包括基于目前使用的设计规范评估鞍座抗滑安全的确定性方法;基于静态车辆数据合成随机车流,并利用Rice公式外推其荷载效应极值,进而研究鞍座抗滑安全性能的评估方法;以及基于车辆荷载效应和抗力概率模型的鞍座抗滑概率评估方法。用上述三种方法分别对泰州大桥鞍座抗滑安全性进行全面评估,表明泰州大桥中塔鞍座抗滑安全可靠。In this paper, the basic model of main cable slip between saddles is established. Three methods to assess the safety of saddle sliding on middle tower of the Taizhou Bridge are presented based on this model. The first assessment method is deterministic, which is based on live load model of design codes. Several design codes models are used, and assessment results are compared. In the second method, the uncertainty of traffic load is con- sidered in a more accurate way. Random traffic flow simulation model is developed to simulate real traffic situation on the bridge. Extreme value of unbalance force is obtained by extrapolation methods based on Rice formula. The last assessment method is probabilistic based method. The probabilistic model of load effect and structure resistance is established, and reliability index of anti-sliding safety is calculated. All three assessment results indicate that the middle tower saddle of the Taizhou Yangtze River Bridge is safe and reliable.

关 键 词：三塔两跨悬索桥 中间塔鞍座 确定性评估 概率评估 

分 类 号：TU311.2[建筑科学—结构工程]