基于复杂地基的切割式横缝碾压混凝土重力坝动力响应分析

详细信息    查看全文 | 推荐本文 |

英文篇名：Complicated foundation-based dynamic response analysis on RCC gravity dam with incised transverse joint 作者：李金友 英文作者：LI Jinyou;Shanghai Investigation,Design and Research Institute Co.,Ltd.;College of Water Conservancy and Hydropower Engineering,Hohai University; 关键词：重力坝 ; 粘弹性边界 ; 地震波 ; 砂岩泥岩互层 ; 横缝 ; 动力响应 英文关键词：concrete gravity dam;;viscoelastic boundary;;seismic wave;;sandstone-mudstone interbedding;;transverse joint;;dynamic response 中文刊名：水利水电技术 英文刊名：Water Resources and Hydropower Engineering 机构：上海勘测设计研究院有限公司;河海大学水利水电学院; 出版日期：2019-01-20 出版单位：水利水电技术 年：2019 期：01 基金：国家自然科学基金项目(51579083);; 水利部公益性行业科研专项经费项目“高混凝土坝抗震安全研究”(20155015412);; 水文水资源与水利工程科学国家重点实验室开放基金(2017491811) 语种：中文; 页：113-121 页数：9 CN：11-1757/TV ISSN：1000-0860 分类号：TV642

摘要

巴基斯坦东北部旁遮普省和阿扎德查谟克什米尔地区交界的玛尔水电站大坝为碾压混凝土重力坝,其坝基岩性为不同强度的砂岩以及砂岩与泥岩互层,区域构造及地震地质背景复杂。在进行岩体质量分级的基础上,研究了坝体横缝及坝体-坝基接触缝模拟方法,选取玛尔电站10~#—11~#坝段群为研究对象,运用CZM双线性模型模拟坝体接触缝,计算分析了考虑砂岩泥岩互层地基情况下坝体的动位移和动应力分布状况。结果表明,减小横缝切割深度可以有效降低坝体的动力响应,对坝体应力分布和抗震安全有利;若考虑坝基的砂岩泥岩互层分布,坝踵、坝趾各点的动应力差异显著。
        The dam of Mahl Hydropower Station in Pakistan is a RCC gravity dam. The lithology of the bed rock consists of sandstone with different strengths as well as sandstone-mudstone interbedding,for which the regional structure and the geological background of seismic activity therein are complicated. On the basis of the quality classification of rock mass,the method for simulating the transverse joint-dam foundation contact joint is studied herein. Taking the No. 10-11 dam sections of Mahl Hydropower Station as the study object,the contact joint of the dam body is simulated with CZM bilinear model,and then the dynamic displacement and the dynamic stress distribution of the dam body under the consideration of the sandstone-mudstone interbedding foundation are studied and analyzed. The result shows that decreasing the cutting depth of the transverse joint can effectively lower the dynamic response of the dam body,which is favorable to the stress distribution and seismic safety of the dam body. If the sandstone-mudstone interbedding distribution of the dam body is considered,the differences among all the points of both the heel and toe of the dam are significant.

引文

[1]徐志,马静,贾金生,等.水能资源开发利用程度国际比较[J].水利水电科技进展,2018,38(1):63-67.
    [2]徐卫亚,谢守益,徐瑞春,等.水布垭水电站坝基岩体地质模型研究[J].工程地质学报,2002,10(3):260-265.
    [3]王思敬.坝基岩体工程地质力学分析[M].北京:科学出版社,1991.
    [4]洪永文,杜成斌,江守燕.复杂条件下高碾压混凝土重力坝设计理论与实践[M].北京:科学出版社,2014.
    [5]王海波,杨会臣.混凝土重力坝全坝段三维动力分析[J].水力发电学报,2011,30(6):133-137.
    [6] G ALFANO,M A CRISFIELD. Finite element interface models forthe delamination analysis of laminated composites:mechanical andcomputational Issues[J]. International Journal for Numerical Meth-ods in Engineering,2001,50(7):1701-1736.
    [7]杜修力,赵密.基于黏弹性边界的拱坝地震反应分析方法[J].水利学报,2006,37(9):1063-1069.
    [8]龚曙光,谢桂兰,黄云清. ANSYS参数化编程与命令手册[M].北京:机械工业出版社,2010.
    [9]国家能源局.水电工程水工建筑物抗震设计规范:NB 35047—2015[S].北京:中国电力出版社,2015.