高烈度区大倾角坝基上抽水蓄能高面板堆石坝动力反应特性研究
Study on dynamic response characteristics of high face slab pumped storage dam with large dip dam foundation in high-intensity region
投稿时间:2021-09-15  修订日期:2022-07-12
DOI:
中文关键词:  地震波输入角度  面板坝  动力反应  坝坡稳定性
英文关键词:Input Angle of seismic wave  Face dam  Dynamic response  Slope stability
基金项目:国家自然科学基金(No:51979225;51679199)
作者单位邮编
党发宁 西安理工大学 岩土工程研究所 710048
陈晶晶 西安理工大学 岩土工程研究所 710048
高天晴 西安理工大学 岩土工程研究所 
高俊 西安理工大学 岩土工程研究所 
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中文摘要:
      本文采用三维有限元计算方法和沈珠江动本构模型,首先,研究了地震波水平输入角度对某高烈度地区大倾角坝基上的抽水蓄能高面板堆石坝动反应的影响,以地震过程中坝顶峰值加速度,坝体最大动位移与最大动应力,面板最大变形值及最大动应力五个指标作为主要评判标准,对比地震波在八个不同水平输入角度下坝体动反应的大小,发现水平输入角度每改变45°,五个指标均随之变化,呈现“W”型,180°为最不利输入角度,各项指标都处于峰值点。然后,针对处于大倾角坝基上的抽水蓄能高面板坝进行了坝体动反应分析和坝坡稳定性分析,获得了堆石坝的反应加速度随着坝高的增加而增大,震后存在残余变形等地震反应特性,验证该工程坝体在地震反应过程中处于安全状态。获得了地震输入方向对坝体影响的具体表现,为高烈度地区倾斜坝基上高面板坝的动反应研究提供参考,为类似工程建设提供借鉴作用。
英文摘要:
      In this paper, the three-dimensional finite element method and the dynamic constitutive model of Shen Zhujiang are used. Firstly, the influence of the horizontal input angle of seismic waves on the dynamic response of pumped storage high-faced rockfill dam with large dip dam foundation in a high-intensity area is studied. And takes five indexes as the main evaluation criteria: the peak acceleration of dam crest, the maximum dynamic displacement and maximum dynamic stress of dam body, the maximum deformation value and maximum dynamic stress of panel during earthquake. Comparing the magnitude of dam dynamic response under eight different horizontal input angles of seismic wave, it is found that the five indexes change with each 45° change of horizontal input angle, showing a "W" type, 180° is the most unfavorable input angle, and all indexes are at their peak points. Then, the dynamic response analysis and slope stability analysis of pumped storage high-faced rockfill dam with large dip dam foundation are carried out. It is obtained that the response acceleration of rockfill dam increases with the increase of dam height, and there are residual deformation after earthquake and other seismic response characteristics after earthquake. Verify that the dam body of the project is in a safe state during earthquake response. The specific performance of the impact of the seismic input direction on the dam body is obtained, which provides a reference for the study of the dynamic response of a high-faced dam with large dip dam foundation in a high-intensity area , and provides a reference for the construction of similar projects.
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