摘要
随着内河航道通航船舶吨位及密度的增加,船桥碰撞风险加剧,成为影响桥梁正常运行以及内河通航安全的关键因素之一。基于AASHTO模型,以长江某斜拉桥为例,采用Xtract软件和MIDAS全桥模型分别计算桥墩控制截面的极限弯矩和桥墩内力,分析确定桥梁桥墩抗力;采用现行规范、经验公式与有限元计算的方法确定桥区通航代表船型对桥墩的撞击力;运用AASHTO模型计算桥梁年撞击概率和年撞损概率,确定桥梁风险水平并提出合理化建议。结果表明:该桥梁主墩及辅墩的风险概率均在可接受范围内。
With the increase of tonnage and density of inland waterway navigable ships,the risk of ship-bridge collision is increasing,which has become one of the key factors affecting the normal operation of bridges and inland navigation safety.Based on the AASHTO model,taking a cable-stayed bridge in the Yangtze River as an example,the ultimate bending moment and internal force of the pier control section were calculated by Xtract software and MIDAS full bridge model,and the resistance of the bridge pier was analyzed and determined.The impact force of the representative ship type on the bridge pier was determined by the current code,empirical formula and finite element calculation method.AASHTO model was used to calculate the annual impact probability and annual damage probability of bridges,determine the bridge risk level and put forward reasonable suggestions.The results show that the risk probability of the main pier and auxiliary pier of the bridge is within the acceptable range.
作者
邓皓天
刘宪庆
余葵
周强
唐亮
DENG Hao-tian;LIU Xian-qing;YU Kui;ZHOU Qiang;TANG Liang(Hehai College,Chongqing Jiaotong University,Chongqing 400074,China;National Engineering Research Center for Inland Waterway Regulation,Chongqing 400074,China;State Key Laboratory Base of Mountain Bridge and Tunnel Engineering,Chongqing 400074,China)
出处
《科学技术与工程》
北大核心
2023年第5期2164-2170,共7页
Science Technology and Engineering
基金
国家自然科学基金(52171274)
重庆英才计划·创新创业示范团队(CQYC201903204)。
