Physical Modeling on Dynamic Responses of Gravity Dams by Underwater Explosion in a Centrifuge

Hu, Jing; Zhang, Z.-T; Wen, Yanbo; Zhang, X.-D.; Liang, Jianhui; Huang, Xieping

doi:10.1061/(asce)cf.1943-5509.0001591

Cited by 10 publications

(2 citation statements)

References 34 publications

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“…Concrete gravity dams relied on their own gravity to maintain stability and were mainly destroyed by a single dam monolith [12,41] under explosion loads. Taking a concrete gravity dam monolith as a research object, shown in Figure 5, the dam height was 114 m, the top width was 20 m, the bottom width was 112.5 m, the toe of slope was ψ = 55°, the thickness of a single dam monolith was 15 m, and the upstream water depth was 100 m. According to the functional requirements, there were three kinds of building In addition, from the results of physical model tests and numerical simulation tests, it can be found that the transverse joints of the dam can limit the propagation of explosion shock waves between adjacent dam monoliths, manifested as discontinuous failure.…”

Section: Description Of Analysis Modelmentioning

confidence: 99%

“…Concrete gravity dams relied on their own gravity to maintain stability and were mainly destroyed by a single dam monolith [12,41] under explosion loads. Taking a concrete gravity dam monolith as a research object, shown in Figure 5 shown in Figure 6, take one side of the dam's symmetry plane as the rese reduce the amount of calculation and calculation time.…”

Section: Description Of Analysis Modelmentioning

confidence: 99%

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Blast-Resistance and Damage Behavior of Underwater Explosion for Concrete Gravity Dam Considering Concrete Strength Partition

Huo

2023

Buildings

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The consequences of dam damage caused by explosions, wars, and terrorist attacks are extremely serious, and they can cause casualties among downstream residents. Studying the damage behaviors of dams is a prerequisite for improving their anti-knock performance. Researchers view the dam as homogeneous for research; but in reality, the concrete strength of the dam decreases from bottom to top. The partitioning of dam concrete strength can meet the different functional and economic requirements of a concrete gravity dam (referred to as concrete strength partition gravity dam (CSPGD)). Therefore, CSPGD shows a more complex dynamic performance and failure characteristics under the impact load of an underwater explosion. First, by investigating the current status of anti-knock research on CSPGDs, a fully coupled finite element numerical model for an underwater explosion of CSPGD was established. Considering the initial stress such as the self-weight of the dam, the upstream reservoir hydrostatic pressure, and the uplift pressure of the dam foundation during the service period, the anti-knock performance of CSPGD was studied. The results showed that the interface of CSPGD had a strain rate effect under the action of blast load, and it was easy to produce tensile failure at a low strain rate. In addition, the dynamic response and damage characteristics under different explosion scenarios such as explosive charge weight (w), detonation depth (D), and standoff distance (R) were further studied. The dam crest was always a weak anti-knock part, and the foundation anti-sliding stability was also very important to dam safety. Therefore, it was proposed and suggested to use the crack length of the dam crest and dam foundation to evaluate the overall anti-knock capacity of CSPGD. The study also found that the detonation depth affected the response time of dam damage and had a significant impact on the anti-knock performance of CSPGD.

show abstract

Section: Description Of Analysis Modelmentioning

confidence: 99%

“…Concrete gravity dams relied on their own gravity to maintain stability and were mainly destroyed by a single dam monolith [12,41] under explosion loads. Taking a concrete gravity dam monolith as a research object, shown in Figure 5 shown in Figure 6, take one side of the dam's symmetry plane as the rese reduce the amount of calculation and calculation time.…”

Section: Description Of Analysis Modelmentioning

confidence: 99%

Blast-Resistance and Damage Behavior of Underwater Explosion for Concrete Gravity Dam Considering Concrete Strength Partition

Huo

2023

Buildings

View full text Add to dashboard Cite

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A combined finite element and deep learning network for structural dynamic response estimation on concrete gravity dam subjected to blast loads

Fang

Zhang

et al. 2023

Defence Technology

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Failure modes of concrete gravity dam subjected to near-field underwater explosion: Centrifuge test and numerical simulation

Huang

Kong

et al. 2022

Engineering Failure Analysis

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Physical Modeling on Dynamic Responses of Gravity Dams by Underwater Explosion in a Centrifuge

Cited by 10 publications

References 34 publications

Blast-Resistance and Damage Behavior of Underwater Explosion for Concrete Gravity Dam Considering Concrete Strength Partition

Blast-Resistance and Damage Behavior of Underwater Explosion for Concrete Gravity Dam Considering Concrete Strength Partition

A combined finite element and deep learning network for structural dynamic response estimation on concrete gravity dam subjected to blast loads

Failure modes of concrete gravity dam subjected to near-field underwater explosion: Centrifuge test and numerical simulation

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