EN 1097-1:2011 Tests for mechanical and physical properties of aggregates - Part 1: Determination of the resistance to wear (micro-Deval)
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Format: PDF
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Publisher: CEN
Year: 2011
Pages: 14
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This session gives a technical background on the modeling and analysis of masonry structures in DIANA.
A case study for nonlinear modelling of a masonry infilled reinforced concrete frame which was tested experimentally will be presented. This presentation includes:
Description of the specimen
Calibration and validation of the material parameters
Modelling of the infilled frame
Pushover analysis
Comparison of the numerical and experimental results
A classical case-study of a masonry wall with opening will be presented to demonstrate DIANA capabilities for modeling and predicting failure mechanisms of masonry structures.
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A comparison of geostatistical procedures for spatial analysis of precipitation in mountainous terrain
Author: Donald L Phillips; Jayne Dolph; Danny Marks | Size: 1.3 MB | Format:PDF | Quality:Unspecified | Publisher: Elsevier | Year: 1992 | pages: 22 | ISBN: --
Spatially distributed measurements or estimates of precipitation over a region are required for modelling of hydrologic processes and soil moisture for agricultural and natural resource management. Simple interpolation methods fail to consider the effects of topography on precipitation and may be in considerable error in mountainous regions. The performance of three geostatistical methods for making mean annual precipitation estimates on a regular grid of points in mountainous terrain was evaluated. The methods were: ( 1 ) kriging; (2) kriging elevation-detrended data; and (3) cokriging with elevation as an auxiliary variable. The study area was the Willamette River basin, a 2.9 million hectare region spanning the area between the Coast Range and the Cascade Range in western Oregon. Compared with kriging, detrended kriging and cokriging both exhibited better precision (as indicated by estimation coefficients of variation of 16 and 17% vs. 21%; and average absolute errors of 19 and 20 cm vs. 26 cm) and accuracy (as indicated by average errors of - 1.4 and -2.0 cm vs. -5.2 cm) in the estimation of mean annual precipitation. Contour diagrams for kriging and detrended kriging exhibited smooth zonation following general elevation trends, while cokriging showed a patchier pattern more closely corresponding to local topographic features. Detrended kriging and cokriging offer improved spatially distributed precipitation estimates in mountainous terrain on the scale of a few million hectares. Application of these methods for a larger region, the Columbia River drainage in the USA (57 million hectares), was unsuccessful due to the lack of a consistent precipitation-elevation relationship at this scale, Precipitation estimation incorporating the effects of topography at larger scales will require either piecewise estimation using the methods described here or development of a physically based orographic model.
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I'll be very thankful if someone of you is able to provide the standard "EN 1097-1:2011 Tests for mechanical and physical properties of aggregates. Determination of the resistance to wear (micro-Deval)".
This standard specifies the general principles to be adopted for static load testing of timber structures or components. It is intended for use where it is necessary to verify by test that a structure or components complies with stated criteria. Relevant parts may be used for proof loading or for the testing of structures in service. This standard is not intended to be used for testing of individual pieces of timber, individual joints or structural scaled models
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BS EN 595:1995 - Timber structures. Test methods. Test of trusses for the determination of strength and deformation behaviour
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Thomas, H.G., 2011, Slope stability prism monitoring: A guide for practising mine surveyors. Unpublished M.Sc dissertation, University of the Witwatersrand, Johannesburg, South Africa.
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Afeni, T.B. and Cawood, F.T., 2010, ‘Do the properties of glass matter when taking total station distance measurements through an observation window?’ Proceedings of International Society for Mine Surveying (ISM) XIV international Congress held in Sun City, South Africa, pp. 109 – 120
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