Numerical analysis of water reservoir dam—prediction of long term performance of Versetal dam (Germany)

Numerical Analysis of the Long-Term Performance of Energy Piles in Sand

Pavement Materials and Associated Geotechnical Aspects of Civil Infrastructures - Sustainable Civil Infrastructures ◽

10.1007/978-3-319-95759-3_5 ◽

2018 ◽

pp. 57-72

Author(s):

Kang Fei ◽

Wei Hong ◽

Jian Qian

Keyword(s):

Numerical Analysis ◽

Energy Piles ◽

Long Term Performance ◽

Term Performance

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Numerical analysis of the long-term performance of offshore wind turbines supported by monopiles

Ocean Engineering ◽

10.1016/j.oceaneng.2017.03.019 ◽

2017 ◽

Vol 136 ◽

pp. 94-105 ◽

Cited By ~ 16

Author(s):

Hongwang Ma ◽

Jun Yang ◽

Longzhu Chen

Keyword(s):

Numerical Analysis ◽

Wind Turbines ◽

Offshore Wind ◽

Offshore Wind Turbines ◽

Long Term Performance ◽

Term Performance

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A Methodology to Evaluate Long Term Durability of Dam Concrete Due to Calcium Leaching through Microscopic Tests and Numerical Analysis

Materials ◽

10.3390/ma14247819 ◽

2021 ◽

Vol 14 (24) ◽

pp. 7819

Author(s):

Ding Nie ◽

Haoyu Wang ◽

Pengfei Li ◽

Xun Han ◽

Jingbin Zhang ◽

...

Keyword(s):

Numerical Analysis ◽

Scale Model ◽

Seepage Water ◽

Concrete Dams ◽

Calcium Leaching ◽

Durability Analysis ◽

Dam Concrete ◽

Long Term Performance ◽

Term Performance

Hydropower dams are subjected to soft water penetration during their service lives. Concrete deterioration due to calcium leaching will decrease the durability of concrete and affect dam safety. The long-term performance of concrete dams due to calcium leaching should be evaluated and predicted accurately to complete reinforcement work in a timely manner. In this paper, a methodology that combined microscopic tests and numerical analysis to evaluate the long-term performance of dam concrete due to calcium leaching is proposed. The current state of concrete is evaluated by analyzing the components of sediments and seepage water through microscopic and spectroscopic tests, such as X-ray photoelectron spectroscopy, scanning electron microscopy, and inductively coupled plasma mass spectrometry. The long-term degradation of concrete was predicted by utilizing a multi-scale model of calcium leaching, which considered the micro-pore structure of cement hydrates flux with time. The simulated results using this calcium leaching model showed a good agreement with other experiments. Finally, a real case study including field inspection was performed and the long-term durability of dam concrete was predicted through microscopic tests and finite element analysis method. It implies that the proposed method could provide calculation and theoretical basis for the durability analysis of concrete dams due to calcium leaching.

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