知识导航
资源分类

孔口对混凝土重力坝抗爆性能的影响分析

孔口对混凝土重力坝抗爆性能的影响分析

Effects of Orifices on the Antiknock Performance of Concrete Gravity Dams

Effects of Orifices on the Antiknock Performance of Concrete Gravity Dams

doi:
10.3969/j.issn.2096-093X.2018.01.016
摘要:
为满足防洪、发电、灌溉等需求,混凝土重力坝坝体往往设有很多孔口.当爆炸荷载在这些孔口附近起爆时,势必会对大坝造成一定程度的破坏.本文应用Euler-Lagrangian耦合方法,建立了库水、含孔口坝体、炸药、基岩和空气的全耦合模型,对比分析了挡水坝段(不合孔口坝段)和含孔口坝段在水下爆炸荷载作用下的毁伤特征,研究了孔口的存在对大坝毁伤发展过程和破坏模式的影响.结果表明:当坝体含有孔口时,大坝的整体抗爆性能显著降低,在水下爆炸荷载作用下,大坝将在孔口处形成贯穿上下游的裂缝,导致孔口以上的大坝失去挡水作用.
Abstract:
In order to meet the demands of flood control,power,irrigation,etc.,many orifices are set in concrte gravity dams.When the charge is detonation near the orifice,the explosion load will cause considerable damage to the dam.In the present paper,a fully coupled Euler-Lagrangian model considering the effects of the water-orifice-charge-foundation-air interaction is established.The failure modes and damage distribution of the concrete gravity dam with orifice are compared with the dam without orifice.The influence of the orifices on the dynamic response of the concrete gravity dam is discussed.The results show that the orifice designed on the dam body will significantly reduce of the antiknock safety of the concrete gravity dam.Under close-in underwater blast load,cracks are observed at the orifice region and penetrate the whole section o the dam,which will induce a dam break in the orifice location.
作者 范鹏鹏 [1] 赵小华 [2] 王高辉 [2] 杨广栋 [2]
Author: FAN Pengpeng[1] ZHAO Xiaohua[2] WANG Gaohui[2] YANG Guangdong[2]
作者单位
  1. 东方电气集团国际合作有限公司,四川省成都市,611731
  2. 武汉大学水资源与水电工程科学国家重点实验室,湖北省武汉市,430072
期 刊: 水电与抽水蓄能 ISTIC EI SCI PKU CSSCI
Journal: Hydropower and Pumped Storage
年,卷(期) 2018, 4(1)
分类号 TV72
关键词: 混凝土重力坝 知识脉络 孔口 知识脉络 水下爆炸 知识脉络 毁伤发展过程 知识脉络 全耦合模型 知识脉络
Keywords: concrete gravity dam orifice underwater explosion failure process fully coupled model
机标分类号
基金项目 国家自然科学基金项目,湖北省自然科学基金
参考文献和引证文献
返回顶部参考文献
返回顶部引证文献
返回顶部本文读者也读过
返回顶部相似文献
返回顶部相关博文

知识产权声明| 服务承诺| 联系我们| 人才招聘| 客户服务| 关于我们

京ICP证:010071  互联网出版许可证:新出网证(京)字042号  京公网安备11010802020237号
万方数据知识服务平台--国家科技支撑计划资助项目(编号:2006BAH03B01)©北京万方数据股份有限公司  万方数据电子出版社