精确制导武器对特大型公路斜拉桥桥塔毁伤分析  

An Analysis of the Damage of Precision-Guided Weapons to the Tower of Oversized Cable-Stayed Bridges of Highways

作　　者：庞彧 李海超 管晔 崔子鑫 PANG Yu;LI Haichao;GUAN Ye;CUI Zixin(Brigade 5 of Army Military Transportation University,Tianjin 300161,China;The National Defense Traffic Department,Army Military Transportation University,Tianjin 300161,China)

机构地区：[1]陆军军事交通学院五大队,天津300161 [2]陆军军事交通学院国防交通系,天津300161

出　　处：《国防交通工程与技术》2020年第5期22-24,7,共4页Traffic Engineering and Technology for National Defence

摘　　要：特大型斜拉桥是跨越深沟险阻的主要结构,在战时是我军需要保护的重点目标。为解决目前特大型斜拉桥桥塔毁伤分析试验数据较少、难以为特大型斜拉桥的抢修防护提供数据支撑的问题,采用ANSYS和ANSYS-LSDYNA等软件进行空爆模拟仿真,分析美军联合防区外空地导弹JASSM对特大型斜拉桥桥塔打击不同部位的毁伤程度和对桥梁剩余承载能力的影响。研究结果显示在中塔的1/2处毁伤面积最大,在中塔的1/4处毁伤对承载力的影响最大、承载力下降幅度达20%。特大型双塔斜拉桥抢修防护的重点应该放在中塔偏上的较高位置。Oversized cable-stayed bridges are the main structures for us to cross the deep gullies and dangerous obstacles,and therefore,they are the key targets that our army needs to strive hard protect in wartime.Aiming at solving the problem of oversized cable-stayed bridges'lacking damage-related analytical data of their towers right now,and thus being difficult to provide the data support for the protection and rush-repair of the oversized cable-stayed bridges,the software of the ANSYS and ANSYS-LSDYNA is used to numerically simulate the air blasting,upon the basis of which the degrees of damage to different parts of the bridge tower of the cable-stayed bridge,which might be done by the US air-to-land guided missiles JASSM from outside the US jointly-defended region,and the effect of the damage on the the residual bearing capacity of the oversized cable-stayed bridge are analyzed.The result of our research shows that the damaged area is the largest when the mid-tower is hit in the half,and the impact on the bearing capacity is the largest when the mid-tower is hit in the quarter,with the bearing capacity decreasing by 20%.Through research and analyses,the focus of the rush-repair and protection of an oversized twin tower cable-stayed bridge should be placed on the upper part of the middle tower of the bridge.

关 键 词：斜拉桥 爆炸 毁伤程度 数值模拟 剩余承载力 

分 类 号：U443.38[建筑科学—桥梁与隧道工程]