摘要
研究目的:随着船舶交通量和吨位的不断增加,跨越可通航水域的大跨桥梁结构的船舶抗撞、防撞设计问题已越来越多的引起了设计人员和专家学者们的重视。本文以某客运专线铁路的预应力混凝刚构连续梁特大桥为背景,对比国内外三种规范对该桥的船舶撞击力结果,并对防撞措施进行研究,以便能够给当前的桥墩防撞设计提供参考。研究结论:(1)采用国内《公路桥规》、《铁路桥规》及美国AASHTO三种规范对该桥的船舶撞击力进行计算,采用MIDAS建立了全桥及桥墩模型,通过反复试算的方法得出了主墩能够承受的最大横桥向撞击力为13.62 MN,大于国内规范的设计值9.62 MN,均满足规范要求;(2)采用设置钢箱混凝土结构防撞墩和废旧轮胎相结合的防撞措施对主墩进行防护,防撞墩的最大抗撞力计算结果表明:每个钢箱混凝土防撞结构可分别承受55%和50%的横向、纵向撞击力设计值;(3)本文的研究成果为客运专线特大桥桥墩的抗撞和防撞措施设计提供了一定的理论依据,对桥墩防撞研究工作有一定的参考意义。
Research purposes： With increasing the average size and traffic of vessels, the ship anti - collison and resistance design of super major bridges crossing navigable waters have become an important problem. This paper takes a prestressed concrete remfoced concrete bridge of a railway line of passenger traffic as an example compared the ship collision forces calculated according to 3 types of domestic and overseas Codes, comprehensively researched the ship collison resistance measures so as to offer the reference for bridge pier anti -collison design. Research conclusions ： （ 1 ） The ship collision forces has been calculated according to 3 types of the Chinese General Code for Design of Highway Bridges and Culverts, Chinese Fundamental Code for Design on Railway Bridge and Culvert and AASHTO. Furtherly, the models of the whole bridge and the piers are established by the finite element program MIDAS, the corresponding calculation has been repeatedly made and it is obtained from the calculation that the maximum ship collision force of main pier can sustain in the transverse direction of bridge is 13.62 MN, larger than the collision design force 9.62 MN calculated by the two types of the domestic codes, all meet the requirements set of codes. （2） The combination collision resistance measure of collision piers and cable protection has been set to protect main piers, the maximum collision force results of pier show that every steel tube concrete collision pier can sustain 55% and 50% lateral and longitudinal design collision force. （3）This paper provides the theoretical evidence for super major bridge pier of a passenger dedicated line and also provides the valuable reference meanings to the study on bridge pier anti - collison research.
出处
《铁道工程学报》
EI
北大核心
2013年第12期46-50,共5页
Journal of Railway Engineering Society
关键词
钢筋混凝土桥墩
双向加载
地震响应分析
纤维梁柱单元
模拟平台
reinforced concrete bridge
biaxial loading
seismic response analysis
elastic - plastic fiber beam - column element
simulation platform
