大桥独立墩柱防船撞方法计算分析  

Numeric Study on Crashworthy Pier to Protect Bridge Against Vessel Collision

作　　者：何益勇 

机构地区：[1]福州市交通建设集团有限公司,福建福州350009

出　　处：《宁波大学学报（理工版）》2012年第3期101-104,共4页Journal of Ningbo University：Natural Science and Engineering Edition

基　　金：国家自然科学基金(10872101);福建省交通厅科研项目(201118)

摘　　要：提出了一种采用独立墩柱作为大桥防船撞设施的设计方法.基于弹性地基梁法及"m法"假定,以平潭海峡大桥47号桥墩设防为例,在给定船舶撞击力的两种工况下,采用Midas Civil2006软件对独立防撞墩结构的抗撞能力进行了有限元模拟分析.计算分析结果表明:在给定工况下,钢管桩的最大压应力和最大拉应力均小于结构材料的屈服极限,独立防撞墩的强度均满足抗撞要求,即独立防撞墩可以选作为大型桥梁主桥桥墩和引桥桥墩防船撞设施.This paper presents a design method using independent pier as the ship collision protection facilities. Taking NO.47 pier of Pingtan Strait Bridge as the case-study, and based on the method of elastically-based beam and the ＂m＂ hypothesis, we use the Midas-civil-2006 to study responses of the crashworthy device under the preset condition. The simulation results show that under the given condition, both the maximum compressive stress and maximum tensile stress of the steel pipe pier are less than the yield limit of the steel. The strength of protection piers satisfies the related technical requirements, and the scheme of crashworthy piers can be applied to protect a bridge against vessel collision.

关 键 词：桥梁防护 船撞 数值分析 防撞设施 

分 类 号：U697[交通运输工程—港口、海岸及近海工程]