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Analysis of dynamic response and stability of the drainage building intake slope at Lawa Hydropower Station under seismic action
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Xu DENG1, Dong LIU2, Qingxiang WANG2, Wei WEI1, Qinghui JIANG1
Earthquake Engineering and Engineering Dynamics | 2025, 45(1) : 132 - 142
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Earthquake Engineering and Engineering Dynamics | 2025, 45(1): 132-142
Analysis of dynamic response and stability of the drainage building intake slope at Lawa Hydropower Station under seismic action
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Xu DENG1, Dong LIU2, Qingxiang WANG2, Wei WEI1, Qinghui JIANG1
Affiliations
  • 1.School of Civil Engineering and Architecture, Wuhan University, Wuhan 430072, China
  • 2.Zhongnan Engineering Corporation Limited, Power China, Changsha 410014, China
Published: 2025-02-28 doi: 10.13197/j.eeed.2025.0114
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The slopes of hydropower projects in southwest China are high and steep and located in high seismic intensity regions. Consequently, there is a risk of earthquake-induced slope instability. Taking the drainage building intake slope of Lawa Hydropower Station at Jinsha River as an example, the dynamic finite element method is used to simulate the slope under rare strong seismic conditions. Based on this, an analysis of the slope dynamic response is conducted. Then, the post-earthquake slope deformation, stress and plastic zone distribution are studied. Finally, the dynamic stability of the slope below the spillway structure is evaluated using the dynamic strength reduction method, which reveals its potential instability mechanism. The results indicate that the acceleration response of the slope shows an elevation amplification effect, a surface amplification effect and a structural surface amplification effect. The slope undergoes the maximum permanent deformation of 10.2 mm after the earthquake, creating new local tensile stress zones and plastic zones. In rare seismic conditions, the safety factor of the potential sliding mass on the slope is 1.80, and its potential failure mechanism is deformation failure with fault JF1 as the rear boundary surface and rock mass at the slope toe shear damaged. This study can provide reference for the dynamic response and stability analysis of complex high and steep rock slopes with favorable-dipping faults under seismic action.

high and steep rock slope  /  earthquake action  /  dynamic response  /  post-seismic stress deformation  /  dynamic stability
Xu DENG, Dong LIU, Qingxiang WANG, Wei WEI, Qinghui JIANG. Analysis of dynamic response and stability of the drainage building intake slope at Lawa Hydropower Station under seismic action[J]. Earthquake Engineering and Engineering Dynamics, 2025 , 45 (1) : 132 -142 . DOI: 10.13197/j.eeed.2025.0114
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Year 2025 volume 45 Issue 1
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Article Info
doi: 10.13197/j.eeed.2025.0114
  • Receive Date：2023-11-07
  • Online Date：2026-03-20
  • Published：2025-02-28
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  • Received：2023-11-07
  • Revised：2024-01-14
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Affiliations
    1.School of Civil Engineering and Architecture, Wuhan University, Wuhan 430072, China
    2.Zhongnan Engineering Corporation Limited, Power China, Changsha 410014, China
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Citations
表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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