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Dams and Floods

F. Lempérière

Engineering 2017, Volume 3, Issue 1, Pages 144-149 doi: 10.1016/J.ENG.2017.01.018

Abstract: The People’s Republic of China is now leading world dam construction with great success and efficiencyAccidents from floods are analyzed according to the dam’s height, storage, dam material, and spillwayNew solutions appear promising for both dam safety and flood mitigation.

Keywords： Floods Flood mitigation Spillways Labyrinth spillways Dam failures

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Long-term dam safety monitoring of Punt dal Gall arch dam in Switzerland

M. WIELAND, G.F. KIRCHEN

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 1, Pages 76-83 doi: 10.1007/s11709-012-0144-z

Abstract: The 130 m high Punt dal Gall dam is located at the Swiss-Italian border in the South-eastern part ofThe dam is founded on highly folded and partially crushed dolomite and limestone formations.For the monitoring of the dam deformations five inverted pendulums were installed in the dam and threein the rock foundation of the right abutment outside of the dam.The paper describes the long-term safety monitoring of this 42 years old arch dam.

Keywords： dam safety concept arch dam dam instrumentation dam safety monitoring

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China's High Dams Construction and Research on Science and Technology

Chen Zongliang

Strategic Study of CAE 2000, Volume 2, Issue 12, Pages 84-89

Abstract: The scientific and technological achievements and their application in geologic exploration, dam construction, flood discharging and energy dissipation, treatment of dam foundation and treatment of high rock slopeThey in elude the 181 m-high concrete gravity dam in the Three Gorges Project, the 240 m — highCFRD, the 233 m~high Shuibuya CFRD, the 130 m- high Shapai RCC arch dam, the 131 m- high Jiangya RCCgravity dam, etc.

Keywords： hydroelectric power high dam gravity dam arch dam roller compacted concrete dam (RC-CD) concrete facerockfill dam (CFRD)

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Features of seismic hazard in large dam projects and strong motion monitoring of large dams

Martin WIELAND,

Frontiers of Structural and Civil Engineering 2010, Volume 4, Issue 1, Pages 56-64 doi: 10.1007/s11709-010-0005-6

Abstract: Earthquakes can affect large dam projects in many different ways.Among these dams were the 132-m-high Shapai RCC arch dam and the 156-m-high Zipingpu concrete face rockfilldam.These recently completed dams are dam types which, up to now, have not experienced strong ground shaking

Keywords： seismic hazard arch dam concrete face rockfill dam strong motion instrumentation reservoir-triggered

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Interpreting the vulnerability of power systems in cascading failures using multi-graph convolutional Research Article

Supaporn LONAPALAWONG, Changsheng CHEN, Can WANG, Wei CHEN

Frontiers of Information Technology & Electronic Engineering 2022, Volume 23, Issue 12, Pages 1848-1861 doi: 10.1631/FITEE.2200035

Abstract: Analyzing the of in is generally regarded as a challenging problem. Although existing studies can extract some critical rules, they fail to capture the complex subtleties under different operational conditions. In recent years, several deep learning methods have been applied to address this issue. However, most of the existing deep learning methods consider only the grid topology of a power system in terms of topological connections, but do not encompass a power system's spatial information such as the electrical distance to increase the accuracy in the process of graph convolution. In this paper, we construct a novel power- that uses power system topology and spatial information to optimize the edge weight assignment of the line graph. Then we propose a multi-graph convolutional network (MGCN) based on a graph classification task, which preserves a power system's spatial correlations and captures the relationships among physical components. Our model can better handle the problem with that have parallel lines, where our method can maintain desirable accuracy in modeling systems with these extra topology features. To increase the interpretability of the model, we present the MGCN using layer-wise relevance propagation and quantify the contributing factors of model classification.

Keywords： Power systems Vulnerability Cascading failures Multi-graph convolutional networks Weighted line graph

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Key problems and solutions in arch dam heightening

Zuoguang FU, Yunlong HE, Sheng SU

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 1, Pages 98-104 doi: 10.1007/s11709-010-0004-7

Abstract: The dam heightening, which is an effective way to increase reservoir volume, has been paid close attentionThree problems should be dealt with when an arch dam needs to be heightened: stress state getting worseat dam heel, cracking on new added concrete dam surface, and weak bonding between new added concreteand old dam.The tensile stresses on dam’s surface and joint face that have certain relations to the dam heightening

Keywords： arch dam heighten tensile stress finite element method

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Influence of soft rock-fill material as dam embankment with central bituminous concrete membrane

Peter TSCHERNUTTER

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 1, Pages 63-70 doi: 10.1007/s11709-010-0016-3

Abstract: relevant material parameters for a valuation of the deformation behavior of the up- and downstream damshell by means of an embankment dam of medium height.This gave rise to the necessity of adjusting the dam design of the downstream dam shoulder.Several times higher dam settlements as well as significant differential settlements between the up-and downstream dam shell were observed during construction and operation.

Keywords： embankment dam bituminous concrete membrane rock-fill material properties deformation behavior

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Fragility assessment of wood sheathing panels and roof-to-wall connections subjected to wind loading

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 4, Pages 867-876 doi: 10.1007/s11709-021-0745-5

Abstract: The performance of the wood-frame buildings after tornadoes has shown that the majority of the wind damage resulted from building envelope failure most typically due to the loss of the roof. To assess the performance and the reliability of low-rise wood-frame residential buildings with a focus on the roofs, fragility analysis can be used to estimate the probability of failure of a roof when constructed with specified nails and sheathing sizes. Thus, this paper examines the fragility of specific types of nails, roof-to-wall (RW) connection details, and sheathing sizes based on the damaged roofs that were previously assessed in the Dunrobin area in Ottawa (Ontario) that was hit with an Enhanced Fujita (EF3) tornado on September 21, 2018. The presented fragility analysis considers four scenarios, including different sheathing and nail sizes. Dead loads, wind loads, and resistance on the sheathing panels were compiled and analyzed to determine the failure of the examined roofs. The eight fragility models suggest that the safest roof sheathing (RS) is the 1.22 m × 1.22 m sheathing panel with 8 d nails, and the safest RW connections is achieved by using H2.5 hurricane clips.

Keywords： tornadoes wind loads low-rise buildings fragility analysis risk assessment structural failures

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Evaluation method of dam behavior during construction and reservoir filling and application to real dams

Yuji KOHGO, Akira TAKAHASHI, Tomokazu SUZUKI,

Frontiers of Structural and Civil Engineering 2010, Volume 4, Issue 1, Pages 92-101 doi: 10.1007/s11709-010-0009-2

Abstract: In this paper we analyzed a real fill-type dam, named the Minami-Aiki Dam, to verify a numerical consolidation

Keywords： fill dam consolidation analysis unsaturated geo-materials impounding construction

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Assessment of fatigue life of remanufactured impeller based on FEA

Lei XU,Huajun CAO,Hailong LIU,Yubo ZHANG

Frontiers of Mechanical Engineering 2016, Volume 11, Issue 3, Pages 219-226 doi: 10.1007/s11465-016-0394-x

Abstract:

Predicting the fatigue life of remanufactured centrifugal compressor impellers is a critical problem. In this paper, the S-N curve data were obtained by combining experimentation and theory deduction. The load spectrum was compiled by the rain-flow counting method based on the comprehensive consideration of the centrifugal force, residual stress, and aerodynamic loads in the repair region. A fatigue life simulation model was built, and fatigue life was analyzed based on the fatigue cumulative damage rule. Although incapable of providing a high-precision prediction, the simulation results were useful for the analysis of fatigue life impact factors and fatigue fracture areas. Results showed that the load amplitude greatly affected fatigue life, the impeller was protected from running at over-speed, and the predicted fatigue life was satisfied within the next service cycle safely at the rated speed.

Keywords： remanufactured impeller fatigue life impeller failures finite element analysis (FEA)

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Analysis of arch dam deformations

Franz PERNER, Pius OBERNHUBER,

Frontiers of Structural and Civil Engineering 2010, Volume 4, Issue 1, Pages 102-108 doi: 10.1007/s11709-010-0012-7

Abstract: Predicting “regular” dam deformations for prevailing conditions and comparing them with observeddeformations is an essential part of dam surveillance.Prediction of dam deformations can be based on deterministic models, purely statistical models or so-calledand the portion caused by temperature variation.The present article deals with the analysis of arch damprocedure is employed for the analysis of the deformations of the 186 m high Zillergruendl arch dam

Keywords： arch dam analysis Zillergruendl concrete temperature hybrid model

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The Cemented Material Dam: A New, Environmentally Friendly Type of Dam

Jinsheng Jia, Michel Lino, Feng Jin, Cuiying Zheng

Engineering 2016, Volume 2, Issue 4, Pages 490-497 doi: 10.1016/J.ENG.2016.04.003

Abstract:

The first author proposed the concept of the cemented material dam (CMD) in 2009.This concept was aimed at building an environmentally friendly dam in a safer and more economical wayfor both the dam and the area downstream.The concept covers the cemented sand, gravel, and rock dam (CSGRD), the rockfill concrete (RFC) dam (or the cemented rockfill dam, CRD), and the cemented soil dam (CSD).

Keywords： Cemented material dam (CMD) Cemented sand，gravel，and rock dam (CSGRD) Rockfill concrete (RFC) dam Cementedrockfill dam (CRD) Cemented soil dam (CSD) Material properties

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Hongshiyan Landslide Dam Danger Removal and Coordinated Management

Ning Liu

Frontiers of Engineering Management 2014, Volume 1, Issue 3, Pages 308-317 doi: 10.15302/J-FEM-2014041

Abstract: This paper takes an overview of the Hongshiyan landslide dam triggered by an earthquake near Ludian County

Keywords： the Zhaotong Ludian earthquake danger removal of the landslide dam coordinated management

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Research on key construction technologies of concrete dam heightening project

Zhou Hougui

Strategic Study of CAE 2012, Volume 14, Issue 7, Pages 87-92

Abstract:

Based on construction practice of worldwide concrete dam heightening project, 4 key construction technologiesof concrete gravity dam heightening project by the integral heightening mode on the existing dam bythe down stream side and on the dam crest were systematically summarized.

Keywords： construction technology dam heightening concrete dam hydraulic and hydropower engineering

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Challenges of high dam construction to computational mechanics

ZHANG Chuhan

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 1, Pages 12-33 doi: 10.1007/s11709-007-0002-6

Abstract: The current situations and growing prospects of China s hydro-power development and high dam constructionThese include but are not limited to: stress and stability analysis of dam foundations under externalloads; earthquake behavior of dam-foundation-reservoir systems, mechanical properties of mass concreteSome examples demonstrating successful utilizations of computational mechanics in high dam engineeringof arch dams under reservoir loads, and failure analysis of arch dam-foundations.

Keywords： reservoir engineering hydro-power development state-of-the-art computational earthquake