垫座及扩大基础对高拱坝抗震性能的影响分析

陈健云1,刘晓蓬2,李静1,徐建荣3,何明杰3

振动与冲击 ›› 2020, Vol. 39 ›› Issue (18) : 203-208.

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振动与冲击 ›› 2020, Vol. 39 ›› Issue (18) : 203-208.
论文

垫座及扩大基础对高拱坝抗震性能的影响分析

  • 陈健云1,刘晓蓬2,李静1,徐建荣3,何明杰3
作者信息 +

Influences of the cushion and extended foundation on the seismic performance of high arch dams

  • CHEN Jianyun1,LIU Xiaopeng2,LI Jing1,XU Jianrong3,HE Mingjie3
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文章历史 +

摘要

拱坝的抗震薄弱环节包括坝踵、坝肩等部位,针对不良地形、地质条件采用的扩大基础等基础处理措施对高拱坝地震动响应和损伤破坏的影响,采用地震动逐级加载的动力分析方法研究了坝顶节点和拱冠梁节点的顺河向位移、横缝开度以及坝体损伤体积比等地震动响应随地震动超载的变化规律。结果表明,所采取的扩大基础等基础处理措施尽管会加大边缝的张开度,但对拱坝整体抗震性能是有利的,可以有效的降低坝面的损伤破坏程度和范围,结果对类似工程具有参考意义。

Abstract

The seismic weak points of arch dams include dam heels and abutments etc. The enlarged foundations are usually applied as the treatment measures for unfavorable topography and geological conditions, the effects of these measures on seismic damage of high arch dams are analyzed. The displacement, transverse opening and the damage volume ratio of arch dam with enlarged foundation are compared under the earthquake action with different overload multiples. , the protection effect of different design schemes on the seismic capacity of the dam is determined. The results indicate that enlarged foundation is beneficial to the overall seismic performance of arch dam and can effectively reduce the damage degree and damage extent of arch dam surface in spite of the increasing of opening of edge joint , The results have reference significance for similar projects

关键词

拱坝 / 垫座 / 扩大基础 / 地震

Key words

arch dam / cushion / extended foundation / earthquake

引用本文

导出引用
陈健云1,刘晓蓬2,李静1,徐建荣3,何明杰3. 垫座及扩大基础对高拱坝抗震性能的影响分析[J]. 振动与冲击, 2020, 39(18): 203-208
CHEN Jianyun1,LIU Xiaopeng2,LI Jing1,XU Jianrong3,HE Mingjie3. Influences of the cushion and extended foundation on the seismic performance of high arch dams[J]. Journal of Vibration and Shock, 2020, 39(18): 203-208

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