Search Results - subject:"soil structure"

БИОГЕОЦЕНОТИЧЕСКИЙ УРОВЕНЬ ЭКОТОКСИКОЛОГИЧЕСКИХ ЭФФЕКТОВ В СООБЩЕСТВАХ ЖИВЫХ ОРГАНИЗМОВ САРАТОВСКОЙ ОБЛАСТИ

ВИКТОРОВИЧ, ЛАРИОНОВ МАКСИМ; … - In: Вестник Волгоградского … (2009) 3, pp. 238-243

В статье приведены результаты исследований о степени антропогенной модификации природных и рукотворных экосистем, об упрощении образа жизни и деградации...

Persistent link: https://www.econbiz.de/10011222310

Foundation damping and the dynamics of offshore wind turbine monopiles

Carswell, W.; Johansson, J.; Løvholt, F.; Arwade, S.R.; … - In: Renewable Energy 80 (2015) C, pp. 724-736

The contribution of foundation damping to offshore wind turbines (OWTs) is not well known, though researchers have back-calculated foundation damping from “rotor-stop” tests after estimating aerodynamic, hydrodynamic, and structural damping with numerical models. Because design guidelines do...

Persistent link: https://www.econbiz.de/10011263771

An economic evaluation of conservation farming practices for the central west of NSW

Farrell, Terence C. - In: Australasian Agribusiness Review 16 (2008)

improvements in soil structure and nutrient levels. A gross margin model was used to assess benefits over the eight-year period … 1999-2006 for 12 regions in the central west of NSW. The benefits from improved soil structure ranged from $39.85 to $114 …

Persistent link: https://www.econbiz.de/10010923368

Experiments on internal erosion in sandy gravel foundations containing a suspended cutoff wall under complex stress states

Wang, Shuang; Chen, Jian-sheng; Luo, Yu-long; Sheng, … - In: Natural Hazards 74 (2014) 2, pp. 1163-1178

Internal erosion is one of the most common failure modes of embankment dams or foundations, and the simplest and most effective preventive measure is to build a cutoff wall. The soil at the bottom of the cutoff wall is usually under complex stress states. The deeper the cutoff wall, the higher...

Persistent link: https://www.econbiz.de/10010949707

Seismic fragility analysis of 5 MW offshore wind turbine

Kim, Dong Hyawn; Lee, Sang Geun; Lee, Il Keun - In: Renewable Energy 65 (2014) C, pp. 250-256

Considering nonlinear soil–pile interaction, seismic fragility analysis of offshore wind turbine was performed. Interface between ground soils and piles were modeled as nonlinear spring elements. Ground excitation time histories were applied to spring boundaries. Two methods of applying ground...

Persistent link: https://www.econbiz.de/10011044521

On the resonance effect by dynamic soil–structure interaction: a revelation study

Güllü, Hamza; Pala, Murat - In: Natural Hazards 72 (2014) 2, pp. 827-847

The present study makes an attempt to investigate the soil–structure resonance effects on a structure based on dynamic … soil–structure interaction (SSI) methodology by direct method configuration using 2D finite element method (FEM). The … investigation has been focused on the numerical application for the four soil–structure models particularly adjusted to be in …

Persistent link: https://www.econbiz.de/10010996573

Determination of masonry building fundamental frequencies in five Slovenian towns by microtremor excitation and implications for seismic risk assessment

Gosar, Andrej - In: Natural Hazards 62 (2012) 3, pp. 1059-1079

possible occurrence of soil-structure resonance. Measurements were performed in 66 buildings, and by spectral analysis, it was … soil-structure resonance. The difference in average fundamental frequency is very clear between buildings with two and … possible occurrence of soil-structure resonance in general, an average fundamental frequency ± one standard deviation interval …

Persistent link: https://www.econbiz.de/10010996367

Soil management in relation to sustainable agriculture and ecosystem services

Powlson, D.S.; Gregory, P.J.; Whalley, W.R.; Quinton, J.N. - In: Food Policy 36 (2011) S1, pp. 72-72

Requirements for research, practices and policies affecting soil management in relation to global food security are reviewed. Managing soil organic carbon (C) is central because soil organic matter influences numerous soil properties relevant to ecosystem functioning and crop growth. Even small...

Persistent link: https://www.econbiz.de/10010577374

The Use of Spreadsheets for the Seismic Design of Piles

Sadek, Salah; Freiha, Fadi - 2005

Understanding the response of pile foundations to seismic loads is a necessary prerequisite to properly analyze and/or design them. This objective presents the civil engineering student and teacher with a complex problem, which typically challenges and strains the traditional didactic...

Persistent link: https://www.econbiz.de/10009441624