为了探究2022年9月5日四川甘孜州泸定县6.8级地震对大岗山高拱坝的影响,根据坝体及坝基上布置的由21台强震仪组成的强震监测系统监测记录,对泸定地震强震监测数据进行了时域和频域分析,总结了大岗山高拱坝在泸定地震中的动力响应规律。分析结果表明:泸定地震时坝顶与两岸坝肩的位移与加速度较大,加速度峰值最大为576.6 cm/s2,位于坝顶6#坝段;大岗山高拱坝对频率范围为0.5~8 Hz的地震动响应最为明显;坝体高程对地震动响应具有放大效应,且顺河向加速度峰值放大该效应最明显。震后大坝运行状态稳定,整体受地震影响较小,但坝肩及两岸边坡处需引起重视。研究成果可为类似拱坝的安全运行提供参考。
Abstract
The aim of this research is to explore the impact of the 6.8 magnitude earthquake in Luding County,Ganzi Prefecture of Sichuan Province on Dagangshan High Arch Dam on September 5,2022. According to the monitoring data of 21 earthquake sensors installed across the dam body and its foundation,we analyzed the time and frequency domains of the seismic recordings from the Luding earthquake to unravel the dynamic response patterns of Dagangshan High Arch Dam during the earthquake. Findings reveal substantial displacements and accelerations along the dam crest and the abutments on both sides. Notably,the highest recorded acceleration peak,reaching 576.6 cm/s2,was found at the No.6 dam section atop the crest. The seismic impact on Dagangshan High Arch Dam manifests prominently within the frequency spectrum of 0.5 to 8 Hz. Moreover,the dam’s towering stature accentuates ground motion response,particularly amplifying peak accelerations along the riverbanks. Post-earthquake assessment indicates the dam’s operational stability with minimal impact on its overall integrity. However,vigilance is warranted for the dam abutments and adjacent slopes,necessitating meticulous observation and maintenance measures.
关键词
泸定地震 /
时域特征 /
频域特征 /
放大效应 /
大岗山高拱坝
Key words
Luding earthquake /
time domain characteristics /
frequency domain feature /
magnification effect /
Dagangshan high-arch dam
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
参考文献
[1] 秦礼君,陈健云,徐 强,等.高拱坝抗震安全评价指标研究:以白鹤滩拱坝为例[J].水利学报,2022,53(9):1116-1126.(QIN Li-jun,CHEN Jian-yun,XU Qiang,et al. Study on Seismic Safety Evaluation Index of the High Arch Dam:a Case Study of Baihetan Arch Dam[J]. Journal of Hydraulic Engineering, 2022, 53(9): 1116-1126.(in Chinese))
[2] WIELAND M, KIRCHEN G F. Long-term Dam Safety Monitoring of Punt Dal Gall Arch Dam in Switzerland[J]. Frontiers of Structural and Civil Engineering, 2012, 6(1): 76-83.
[3] 李毅男, 李海河, 李迎春, 等. 新疆某拱坝正倒垂系统地震后监测数据分析[J]. 水电与抽水蓄能, 2018, 4(5): 116-120, 56. (LI Yi-nan, LI Hai-he, LI Ying-chun, et al. Analysis of Monitoring Data of Positive Inverted Vertical Line System of an Arch Dam in Xinjiang after Earthquake[J]. Hydropower and Pumped Storage, 2018, 4(5): 116-120, 56.(in Chinese))
[4] OLIVEIRA S, ALEGRE A. Seismic and Structural Health Monitoring of Cabril Dam. Software Development for Informed Management[J]. Journal of Civil Structural Health Monitoring, 2020, 10(5): 913-925.
[5] 裴雪玲,王 波,杜兴忠.大坝强震动响应参数放大效应研究[J].raybet体育在线
院报,2018,35(4):72-75,87.(PEI Xue-ling, WANG Bo, DU Xing-zhong. Amplification Effect of Response Parameters of Dam Strong Motion[J]. Journal of Yangtze River Scientific Research Institute, 2018, 35(4): 72-75, 87.(in Chinese))
[6] 戚翔宇, 袁晓龙, 范智强. 基于汶川波对沙牌拱坝的动力响应分析[J]. 四川水力发电, 2020, 39(5): 97-102. (QI Xiang-yu, YUAN Xiao-long, FAN Zhi-qiang. Dynamic Response Analysis of Shapai Arch Dam Based on Wenchuan Wave[J]. Sichuan Water Power, 2020, 39(5): 97-102.(in Chinese))
[7] 王海波, 许亮华, 廖建新, 等. 基于地震记录的高拱坝模态识别[J]. 中国水利水电科学研究院学报, 2020, 18(4): 241-247. (WANG Hai-bo, XU Liang-hua, LIAO Jian-xin, et al. Modal Identification of an Arch Dam with Seismic Records[J]. Journal of China Institute of Water Resources and Hydropower Research, 2020, 18(4): 241-247.(in Chinese))
[8] 许亮华,高建勇.溪洛渡拱坝强震动响应记录处理分析[J].水电与抽水蓄能,2020,6(5):30-37.(XU Liang-hua, GAO Jian-yong. Data Processing and Analysis of Strong Motion Response Records of Xiluodu Arch Dam[J]. Hydropower and Pumped Storage, 2020, 6(5): 30-37.(in Chinese))[9] 曹学兴, 蒋金磊, 李允鲁, 等. 景洪电站碾压混凝土重力坝强震监测分析[J]. 水电能源科学, 2014, 32(10): 70-74. (CAO Xue-xing, JIANG Jin-lei, LI Yun-lu, et al. Earthquake Monitoring Analysis of Jinghong Roller Compacted Concrete Gravity Dam[J]. Water Resources and Power, 2014, 32(10): 70-74.(in Chinese))
[10] 张伯艳, 李德玉, 涂 劲. 乌东德拱坝非线性地震反应分析[J]. 水力发电学报, 2009, 28(5): 62-67. (ZHANG Bo-yan, LI De-yu, TU Jin. Nonlinear Seismic Analysis of Wudongde Arch Dam[J]. Journal of Hydroelectric Engineering, 2009, 28(5): 62-67.(in Chinese))
[11] 裴雪玲. 强震动条件下的水电站大坝反应特征研究[D]. 贵阳: 贵州大学, 2017. (PEI Xue-ling. Study on Response Characteristics of Hydropower Station Dam under the Condition of Strong Shock[D].Guiyang: Guizhou University, 2017. (in Chinese))
PDF(7886 KB)
