中文核心期刊
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中国科技核心期刊
RCCSE中国核心学术期刊
重庆交通大学学报（自然科学版）

重庆交通大学学报（自然科学版） ›› 2013, Vol. 32 ›› Issue (增1): 784-787.DOI: 10.3969/j.issn.1674-0696.2013.sup.1.14

• 桥梁结构安全评价 • 上一篇    下一篇

爆炸荷载作用下斜拉桥的结构特性

张涛，马如进，陈艾荣   

  1. 同济大学土木工程学院，上海200092
  • 收稿日期:2013-02-05 修回日期:2013-04-12 出版日期:2013-06-30 发布日期:2015-03-12
  • 作者简介:张涛(1988—)，男，湖南娄底人，硕士，主要从事爆炸作用下桥梁结构特性研究。E-mail:tom.zhang@outlook.com.
  • 基金资助:
    交通运输部建设科技项目( 2011 318 494 160) ; 江西省交通运输厅科技项目( 2010C00011)

Structural Characteristics of Cable-Stayed Bridge under Blast Loads

Zhang Tao，Ma Ｒujin，Chen Airong   

  1. School of Civil Engineering，Tongji University，Shanghai 200092，China)
  • Received:2013-02-05 Revised:2013-04-12 Online:2013-06-30 Published:2015-03-12

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摘要： 以大跨径斜拉桥为例，运用流固耦合分析得到了不同等级炸药在内车道以及外车道爆炸后主梁承受的爆炸荷 载力。建立混凝土箱梁、钢箱梁局部分析模型，分析不同等级爆炸发生后主梁的损伤。结果表明:主梁损伤范围主 要受主梁类型以及爆炸质量影响，与爆炸发生水平位置的关联度很小。进一步建立全桥分析模型，根据爆炸荷载时 域模型，开展了动力响应分析。结果表明:振动作用下主梁轴向应力变化很小，靠近爆炸点附近的拉索有较高的断 索风险。

关键词: 爆炸荷载, 斜拉桥, 局部损伤, 动力响应

Abstract: The basting loading capabilities of the main girder of a long-span cable-stayed bridge after different levels of explosives explosion on the inner lane and the outer lane have obtained by using fluid-structure interaction analysis． The analysis models of concrete girder and part of girder were established，and the damage of main girder after different levels of explosives explosion was analyzed． The results show that damage scope is mainly affected by the quality of the explosion and the type of main girder; and it has small relevance with the location of explosion． Full-bridge model is established to perform dynamic analysis，and the results show that axial stress of main girder have little change during vibration; the cables close to the explosion have the high risk of break．

Key words: blast loads, cable-stayed bridge, local damage, dynamic response

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