[1] WANG Jianguo, LI Xiongkai, QIN Shunquan, LI Yongle, et al. Effect of structural flexibility and geometry on the hydrodynamic force of vertical columns under dam-break flow [J]. Journal of Southeast University (English Edition), 2025, 41 (3): 261-269. [doi:10.3969/j.issn.1003-7985.2025.03.001]
Copy
Effect of structural flexibility and geometry on the hydrodynamic force of vertical columns under dam-break flow(
)
溃坝水流作用下结构柔性及截面形状对桩柱水流力的影响
)Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]
- Volumn:
- 41
- Issue:
- 2025 3
- Page:
- 261-269
- Research Field:
- Traffic and Transportation Engineering
- Publishing date:
- 2025-09-11
Info
- Title:
- Effect of structural flexibility and geometry on the hydrodynamic force of vertical columns under dam-break flow
- 溃坝水流作用下结构柔性及截面形状对桩柱水流力的影响
- Author(s):
- WANG Jianguo, LI Xiongkai, QIN Shunquan, LI Yongle, WEI Kai
- State Key Laboratory of Bridge Intelligent and Green Construction, Southwest Jiaotong University, Chengdu 611756, China
- Keywords:
- hydrodynamic force; structural flexibility; material elasticity; initial downstream water height; blockage effect; dam-break flow
- PACS:
- U443.22
- DOI:
- 10.3969/j.issn.1003-7985.2025.03.001
- Abstract:
- Past investigations of the hydrodynamic forces on vertical columns have generally been based on rigid structure assumptions. The effects of structural flexibility and geometry characteristics on the hydrodynamic force distribution are not well understood. In this study, fluid-structure interaction models are developed for numerical analyses. This modeling technique is verified with an experimental test in the literature using both circular and rectangular cross-sections. A series of material elasticities that present structural properties ranging from rigid to flexible is then used to conduct analyses. This finding indicates that an increase in structural flexibility can decrease the impact force to some extent, but this effect is limited. A concrete bridge pier with fluid flow impact can be considered rigid when it is fixed at the bottom. After that, the effects of the initial downstream water height and the width of water tank on the hydrodynamic force are thoroughly investigated. The results demonstrate that the increase in the downstream water height with a constant upstream water height corresponds to a decreased force. Moreover, the vertical column results in a blockage effect on the fluid flow. The greater the blockage effect, the higher the hydrodynamic force. The blockage effect from the vertical column can be neglected when the tank width is greater than eight times the structural cross-section diameter.
- 桩柱式结构上水流力的计算通常是基于刚性结构假定进行的，结构的柔性及截面形状特征对水流力的影响还需进行深入研究。本文利用流固耦合模型进行数值分析，并通过文献中试验结果对计算模型进行校核（圆形、矩形桩柱结构）。首先，通过改变材料弹性模量实现由刚性结构到弹性结构的变化，并进行数值分析。结果表明，增加结构柔性可在一定程度上减小结构上的水流力，但效果并不显著，底部固结的混凝土桥墩在受到水流力冲击作用时可认定为刚性结构。然后，分析了初始下游水深、水槽宽度等参数对水流力的影响。结果表明，当上游初始水深不变时，增大溃坝模型初始下游水深将会使水流力降低。另外，结构会对水流产生阻塞作用，且阻塞比越大，水流力越大。当水槽宽度大于8倍结构截面尺寸时，桩柱式结构对水流产生的阻塞作用可忽略。
References:
[1]XIONG W, ZHANG D N, MA X L, et al. Review of resilience assessment in urban floods on transportation road network infrastructures[J]. Journal of Southeast University (Natural Science Edition), 2024, 54(2): 329-345. (in Chinese)
[2]WARDHANA K, HADIPRIONO F C. Analysis of recent bridge failures in the United States[J]. Journal of Performance of Constructed Facilities, 2003, 17(3): 144-150.
[3]REN M J. Study on bridge failure mechanism under flood wave-current coupled stress[D]. Dalian: Dalian University of Technology, 2019.
[4]ST-GERMAIN P, NISTOR I, TOWNSEND R. Numerical modeling of the impact with structures of tsunami bores propagating on dry and wet beds using the SPH method[J]. International Journal of Protective Structures, 2012, 3(2): 221-255.
[5]KAMRA M M, AL SALAMI J, SUEYOSHI M, et al. Experimental study of the interaction of dambreak with a vertical cylinder[J]. Journal of Fluids and Structures, 2019, 86: 185-199.
[6]CUMMINS S J, SILVESTER T B, CLEARY P W. Three-dimensional wave impact on a rigid structure using smoothed particle hydrodynamics[J]. International Journal for Numerical Methods in Fluids, 2012, 68(12): 1471-1496.
[7]PAN K, IJZERMANS R H A, JONES B D, et al. Application of the SPH method to solitary wave impact on an offshore platform[J]. Computational Particle Mechanics, 2016, 3(2): 155-166.
[8]WEI Z P, DALRYMPLE R A, HÉRAULT A, et al. SPH modeling of dynamic impact of tsunami bore on bridge piers[J]. Coastal Engineering, 2015, 104: 26-42.
[9]WANG J G, WEI K, CAI H W. Dynamic response of cylindrical bridge pier subjected to the impact of flash flooding considering the effect of soil-structure interactions[J]. Structures, 2025, 72: 108199.
[10]DEGROOTE J, SOUTO-IGLESIAS A, VAN PAEPEGEM W, et al. Partitioned simulation of the interaction between an elastic structure and free surface flow[J]. Computer Methods in Applied Mechanics and Engineering, 2010, 199(33/34/35/36): 2085-2098.
[11]ZHONG J, WANG H, ZHU X J. Sensitivity analysis of spatial effect parameters of multi-support excitation ground motion[J]. Journal of Southeast University (Natural Science Edition), 2024, 54(6): 1377-1385. (in Chinese)
[12]HIRT C W, NICHOLS B D. Volume of fluid (VOF) method for the dynamics of free boundaries[J]. Journal of Computational Physics, 1981, 39(1): 201-225.
[13]DONEA J, GIULIANI S, HALLEUX J P. An arbitrary Lagrangian-Eulerian finite element method for transient dynamic fluid-structure interactions[J]. Computer Methods in Applied Mechanics and Engineering, 1982, 33(1/2/3): 689-723.
[14]BATHE K J. ADINA theory and modeling guide, volume Ⅲ: CFD and FSI[M]. Watertown, MA, USA: ADINA R & D. Inc., 2018.
[15]ZHOU R, WANG H, XU Z D, et al. Wind-resistance reliability assessment of flexible photovoltaic support in region prone to strong wind[J]. Journal of Southeast University (Natural Science Edition), 2024, 54(4): 845-851. (in Chinese)
[16]ZHU M J, SCOTT M H. A PFEM background mesh for simulating fluid and frame structure interaction[J]. Journal of Structural Engineering, 2022, 148(6): 04022051.
[17]HU C H, KAMRA M M, WATANABE S. Numerical and experimental investigation of dam-break flow against a vertical cylinder[C]// The 36th International Workshop on Water Waves and Floating Bodies. Seoul, Republic of Korea, 2021: 85-88.
[18]XING C X, SHU Y W, ZHU X J, et al. Multistage seismic damage constitutive model and parameter calibration of reinforced concrete columns[J]. Journal of Southeast University (English Edition), 2024, 40(4): 386-395.
[19]BRADNER C, SCHUMACHER T, COX D, et al. Experimental setup for a large-scale bridge superstructure model subjected to waves[J]. Journal of Waterway, Port, Coastal, and Ocean Engineering, 2011, 137(1): 3-11.
[20]YANG S L, YANG W L, QIN S Q, et al. Numerical study on characteristics of dam-break wave[J]. Ocean Engineering, 2018, 159: 358-371.
[21]ASADOLLAHI N, NISTOR I, MOHAMMADIAN A. Numerical investigation of tsunami bore effects on structures, Part Ⅱ: Effects of bed condition on loading onto circular structures[J]. Natural Hazards, 2019, 96(1): 331-351.
[22]QIN J X, YANG X X, WEI K, et al. Cross-sectional blockage effect on the drag force of a scaled round-ended pier model under directional flow[J]. Ocean Engineering, 2022, 264: 112532.
Memo
- Memo:
-
Received 2024-12-19,Revised 2025-02-18.
Biographies: Wang Jianguo (1993─), male, doctor; Wei Kai (corresponding author), male, doctor, professor, kaiwei@swjtu.edu.cn.
Foundation items:The National Natural Science Foundation of China (No. 52222804, U21A20154).
Citation:WANG Jianguo,LI Xiongkai,QIN Shunquan,et al.Effect of structural flexibility and geometry on the hydrodynamic force of vertical columns under dam-break flow[J].Journal of Southeast University (English Edition),2025,41(3):261-269.DOI:10.3969/j.issn.1003-7985.2025.03.001.DOI:10.3969/j.issn.1003-7985.2025.03.001