Journal of Yangtze River Scientific Research Institute ›› 2023, Vol. 40 ›› Issue (10): 167-172.DOI: 10.11988/ckyyb.20220519

• Hydraulic Structure and Material • Previous Articles     Next Articles

Instability Analysis of Radial Gate Arm of Erlongshan Reservoir and Optimization Measure

TU Cong-gang, DU Wei-qiong   

  1. Inspection and Testing Center of Hydraulic Metal Structure Quality, Ministry of Water Resources, Zhengzhou 450044, China
  • Received:2022-05-13 Revised:2022-07-15 Online:2023-10-01 Published:2023-10-13

Abstract: The radial gate of the discharge outlet on the left bank of Erlongshan Reservoir in Shaanxi Province was damaged due to the instability of the support arm. To investigate the primary causes behind the instability, we analyzed the strength and stability of the gate arm using the statics analysis module and linear eigenvalue buckling analysis module based on ANSYS following a comprehensive analysis of the accident site. Results indicate that the buckling failure of the gate arm occurred primarily due to inadequate sectional bending capacity. Based on these findings, we put forward recommendations regarding the renovation by using box beam arm structure. Subsequent verification demonstrates significant improvements in the strength and stability of the box beam structure arm, consequently meeting the specifications and safe operation requirements. The recommended method is of referential value for the safety evaluation and renovation of similar arc gates in other hydraulic engineering projects.

Key words: radial gate, instability of gate arm, renovation, ANSYS, Erlongshan Reservoir

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