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Dynamic modeling framework of sediment trapped by check-dam networks: A case study of a typical watershed Article

Pengcheng Sun, Yiping Wu

Engineering 2023, Volume 27, Issue 8,   Pages 209-221 doi: 10.1016/j.eng.2021.12.015

Abstract: Quantitative estimations of the dynamic sediment trapped by check dams are necessary for evaluating theeffects of check dams and planning the construction of new ones.), for modeling the sediment trapped by check dams dynamically, by integrating the widely utilized SWATFor the Yan River Basin, our results indicated that the designed structural parameters of check damsSediment retained by check dams contributed to approximately 15.0% of the total sediment load reduction

Keywords： Check dams     Dynamic check dam (DCDam)     Loess Plateau     Sediment trapping     SWAT    

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Reliability and variance-based sensitivity analysis of arch dams during construction and reservoir impoundment

M. Houshmand KHANEGHAHI, M. ALEMBAGHERI, N. SOLTANI

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 3,   Pages 526-541 doi: 10.1007/s11709-018-0495-1

Abstract: The static performance of arch dams during construction and reservoir impoundment is assessed taking

Keywords： concrete arch dams     reliability     randomness     improved Latin hypercube sampling     variance-based sensitivity    

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An improved low-complexity sum-product decoding algorithm for low-density parity-check codes

Michaelraj Kingston ROBERTS,Ramesh JAYABALAN

Frontiers of Information Technology & Electronic Engineering 2015, Volume 16, Issue 6,   Pages 511-518 doi: 10.1631/FITEE.1400269

Abstract: paper, an improved low-complexity sum-product decoding algorithm is presented for low-density parity-checkcomputational complexity is achieved by utilizing fast Fourier transform (FFT) with time shift in the check

Keywords： Computational complexity     Coding gain     Fast Fourier transform (FFT)     Low-density parity-check (LDPC)    

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SOIL CARBON CHECK: A TOOL FOR MONITORING AND GUIDING SOIL CARBON SEQUESTRATION IN FARMER FIELDS

Frontiers of Agricultural Science and Engineering 2023, Volume 10, Issue 2,   Pages 248-261 doi: 10.15302/J-FASE-2023499

Abstract:

● Establishment of a rapid tool for monitoring soil carbon sequestration in farmer fields.

Keywords： 4 per 1000 initiative     carbon sequestration     climate action     farmer fields     SDG13     soil organic carbon     soil testing    

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Hazard potential of zones of weakness in gravity dams under impact loading conditions

Herbert LINSBAUER

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 1,   Pages 90-97 doi: 10.1007/s11709-010-0008-3

Abstract: Dam constructions worldwide are designed and constructed in view of the strictest safety aspects for all static and dynamic load cases. As experience shows, however, formation of cracks in the “homogeneos concrete” as well as unsatisfactory compound behavior of lift joints are not to be excluded. These zones of weakness especially on the upstream side of the dam— exposed to high water pressure (static and dynamic)— represent an increased risk of safety. The main investigation, apart from the computation of the dynamic effects on the dam as a global structure, focuses on the stability analysis of a pressure-water filled crack configuration subjected to “dynamic loading” in the form of seismic action on the dam-reservoir-system and alternatively by “impact spot-loading” within sectors of the reservoir. A fracture mechanics based analysis shows an excessive potential of damage for the afflicted structure.

Keywords： dam-reservoir     earthquake     impact     cracking     fracture mechanics    

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Behavior of materials for earth and rockfill dams: Perspective from unsaturated soil mechanics

Eduardo E. ALONSO, Rafaela CARDOSO,

Frontiers of Structural and Civil Engineering 2010, Volume 4, Issue 1,   Pages 1-39 doi: 10.1007/s11709-010-0013-6

Abstract: The basis of the design of earth and rockfill dams is focused on ensuring the stability of the structurehydro-mechanical behavior of traditional and non-traditional materials used in the construction of damsthe current level of knowledge on the behavior of traditional materials used in the construction of dams

Keywords： dams     unsaturated soil mechanics     suction     rockfill     clayey soil     mixture    

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Dynamic failure analysis of concrete dams under air blast using coupled Euler-Lagrange finite element

Farhoud KALATEH

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 1,   Pages 15-37 doi: 10.1007/s11709-018-0465-7

Abstract: In this study, the air blast response of the concrete dams including dam-reservoir interaction and acousticelement (FE) developed code are used to build three-dimensional (3D) finite element models of concrete damsNumerical results revealed that 1) concrete arch dams are more vulnerable to air blast loading than concretegravity dams; 2) reservoir has mitigation effect on the response of concrete dams; 3) acoustic cavitationintensify crest displacement of concrete dams.

Keywords： air blast loading     concrete dams     finite element     dam-reservoir interaction     cavitation     concrete damage model    

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Safety Aspects of Sustainable Storage Dams and Earthquake Safety of Existing Dams

Martin Wieland

Engineering 2016, Volume 2, Issue 3,   Pages 325-331 doi: 10.1016/J.ENG.2016.03.011

Abstract: The special features of the seismic safety of dams are discussed.Large dams were the first structures to be systematically designed against earthquakes, starting in thepractices and rehabilitate deficient dams.For large dams, a site-specific seismic hazard analysis is usually recommended.Today, large dams and the safety-relevant elements used for controlling the reservoir after a strong

Keywords： Dams     Earthquake design     Earthquake safety     Existing dams     Design criteria     Seismic hazard     Sustainability    

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Shape design of arch dams under load uncertainties with robust optimization

Fengjie TAN, Tom LAHMER

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 4,   Pages 852-862 doi: 10.1007/s11709-019-0522-x

Abstract: need in hydro-electricity, water storage, and flood protection, it is assumed that a series of new damsThe focus of this paper is on the non-probabilistic-based design of new arch-type dams by applying means

Keywords： arch dam     shape optimization     robust optimization     load uncertainty     approximation model    

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Earthquake analysis of arch and gravity dams including the effects of foundation inhomogeneity

LIN Gao, DU Jianguo, HU Zhiqiang

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 1,   Pages 41-50 doi: 10.1007/s11709-007-0004-4

Abstract: interaction plays an important role in the design of earthquake-resistant concrete arch and gravity damsIn this paper, the effect of foundation inhomogeneity on the seismic response of arch and gravity damsstiffness discontinuity and with weak interlayer strata on the earthquake response of concrete arch damsas well as gravity dams were analyzed.effect of foundation inhomogeneity for the earthquake safety assessment of concrete arch and gravity dams

Keywords： selection     interlayer     damfoundation interaction     Geological     computational    

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Medical oncology management of advanced hepatocellular carcinoma 2019: a reality check

Amy Lee, Fa-Chyi Lee

Frontiers of Medicine 2020, Volume 14, Issue 3,   Pages 273-283 doi: 10.1007/s11684-019-0728-2

Abstract: In terms of global cancer-related deaths, hepatocellular carcinoma (HCC) has the fourth highest mortality rate. Up until 2017, treatment of advanced HCC was largely limited to sorafenib, an oral tyrosine kinase inhibitor, with little to no success in the development of alternative treatment options. However, in the past two years, there has been an unprecedented increase in both the number and type of treatment options available for HCC. As of 2019, the US FDA has approved four oral tyrosine kinase inhibitors, two immune checkpoint inhibitors, and one anti-angiogenesis antibody for the treatment of HCC. Even with this new variety, systemic treatment of advanced HCC remains largely unsatisfactory, and the median survival rate stands at approximately one year. The expected breakthrough of using immune checkpoint inhibitors in advanced HCC did not materialize in 2019. The use of immune checkpoint inhibitors in conjunction with oral tyrosine kinase inhibitors or anti-angiogenesis medications is the current clinical research trend, the results of which are eagerly anticipated. Despite limited progress in survival, HCC research is currently experiencing a period of growth and innovation, and there is hope for significant advances in the treatment of advanced HCC as the field continues to develop.

Keywords： hepatocellular carcinoma     tyrosine kinase inhibitor     check point inhibitor     anti-angiogenesis    

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Strengthening of the concrete face slabs of dams using sprayable strain-hardening fiber-reinforced cementitious

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 2,   Pages 145-160 doi: 10.1007/s11709-022-0806-4

Abstract: In this study, sprayable strain-hardening fiber-reinforced cementitious composites (FRCC) were applied to strengthen the concrete slabs in a concrete-face rockfill dam (CFRD) for the first time. Experimental, numerical, and analytical investigations were carried out to understand the flexural properties of FRCC-layered concrete slabs. It was found that the FRCC layer improved the flexural performance of concrete slabs significantly. The cracking and ultimate loads of a concrete slab with an 80 mm FRCC layer were 132% and 69% higher than those of the unstrengthened concrete slab, respectively. At the maximum crack width of 0.2 mm, the deflection of the 80-mm FRCC strengthened concrete slab was 144% higher than that of the unstrengthened concrete slab. In addition, a FE model and a simplified analytical method were developed for the design and analysis of FRCC-layered concrete slabs. Finally, the test result of FRCC leaching solution indicated that the quality of the water surrounding FRCC satisfied the standard for drinking water. The findings of this study indicate that the sprayable strain-hardening FRCC has a good potential for strengthening hydraulic structures such as CFRDs.

Keywords： strain-hardening cementitious composites     engineered cementitious composites     sprayable     shotcrete     strengthening     concrete-face rockfill dam     digital image correlation    

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Consideration on seismic safety of dams in China after the Wenchuan Earthquake

Chen Houqun

Strategic Study of CAE 2009, Volume 11, Issue 6,   Pages 44-53

Abstract:

In this paper the damages and behaviors of dams, especially for the 4dams with a height over 100 m, in the area affected by the devastative Wenchuan Earthquake on May 12Some critical problems related to the seismic safety of dams in China are discussed.Finally, some suggestions and comments for improving seismic safety of dams in China are provided.

Keywords： Wenchuan Earthquake     safety of dams     reservoir earthquake     strategic priority    

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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 development and characteristics of high dams construction in China are introduced.The developing trends of high dams in the future are presented and the key research works on scienceand technology of high dams are indicated.

According to the incomplete statistical data, about 24 000 dams over 15 min height have beenconstructed, and there are 16 dams with height over 150 m to be completed or under construction.

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

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A general framework for modeling long-term behavior of earth and concrete dams

Bernhard A. SCHREFLER, Francesco PESAVENTO, Lorenzo SANAVIA, Giuseppe SCIUME, Stefano SECCHI, Luciano SIMONI

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 1,   Pages 41-52 doi: 10.1007/s11709-010-0070-x

Abstract: Many problems are linked with the long-term behavior of both earthdams and concrete dams.They range from hydraulic fracturing to alkali-silica reaction (ASR) and to repair work in concrete dams

Keywords： earth dams     concrete dams     multiphase porous materials     coupled problems     hydraulic fracture     concrete hydration    

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Title Author Date Type Operation

Dynamic modeling framework of sediment trapped by check-dam networks: A case study of a typical watershed

Pengcheng Sun, Yiping Wu

Journal Article

Reliability and variance-based sensitivity analysis of arch dams during construction and reservoir impoundment

M. Houshmand KHANEGHAHI, M. ALEMBAGHERI, N. SOLTANI

Journal Article

An improved low-complexity sum-product decoding algorithm for low-density parity-check codes

Michaelraj Kingston ROBERTS,Ramesh JAYABALAN

Journal Article

SOIL CARBON CHECK: A TOOL FOR MONITORING AND GUIDING SOIL CARBON SEQUESTRATION IN FARMER FIELDS

Journal Article

Hazard potential of zones of weakness in gravity dams under impact loading conditions

Herbert LINSBAUER

Journal Article

Behavior of materials for earth and rockfill dams: Perspective from unsaturated soil mechanics

Eduardo E. ALONSO, Rafaela CARDOSO,

Journal Article

Dynamic failure analysis of concrete dams under air blast using coupled Euler-Lagrange finite element

Farhoud KALATEH

Journal Article

Safety Aspects of Sustainable Storage Dams and Earthquake Safety of Existing Dams

Martin Wieland

Journal Article

Shape design of arch dams under load uncertainties with robust optimization

Fengjie TAN, Tom LAHMER

Journal Article

Earthquake analysis of arch and gravity dams including the effects of foundation inhomogeneity

LIN Gao, DU Jianguo, HU Zhiqiang

Journal Article

Medical oncology management of advanced hepatocellular carcinoma 2019: a reality check

Amy Lee, Fa-Chyi Lee

Journal Article

Strengthening of the concrete face slabs of dams using sprayable strain-hardening fiber-reinforced cementitious

Journal Article

Consideration on seismic safety of dams in China after the Wenchuan Earthquake

Chen Houqun

Journal Article

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

Chen Zongliang

Journal Article

A general framework for modeling long-term behavior of earth and concrete dams

Bernhard A. SCHREFLER, Francesco PESAVENTO, Lorenzo SANAVIA, Giuseppe SCIUME, Stefano SECCHI, Luciano SIMONI

Journal Article