Author: Dr Andrew Bond (Geocentrix) | Size: 4 MB | Format:PDF | Year: October 2010 | pages: 39
April 2010: the death of British Standards?
UK implementation of Eurocodes
Verification of strength: limit states STR and GEO
Some technical pitfalls
Guidance on use of Eurocodes
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Size: 39 KB | Format:PDF | Publisher: Federation of Piling Spec | Year: May 2011
The UK Federation of Piling Specialists has published a 'Position Paper' regarding certain onerous clauses that appear in EN 1992-1-1 (Eurocode 2) regarding the design of cast-in-place piles without permanent casing.
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I made digitalization of 4 scanned time history records. Firstly I made the digitalization for myself but I decided to share this data with you as well to help you in your research/ teaching or engineering in general. I'd be more than happy if you make some comments (good or even bad) regarding this work I made. If some of you think this job is worthless I'd be happy to know that because I plan to use those TH's in making my seminar work and some kind of research. Just please, with every comment I expect full explanation “why” and “why not”. Don't just say "this data is bad"!! It took me 6 days to make digitalization of those 4 THs', so at least you can make full comment.
Data provided here has to be used along with the article "Building vibration to traffic-induced ground motion" written by Hong Haoa, T.C. Anga, Jay Shenb that can be found here:
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All the info concerning the THs’ I didn’t type here, you can find in the article!
Keywords of this post:
building, vibration, traffic-induced, ground motion, time history, ground acceleration, motorcycle, truck, bus, light vehicle
Idea:
Due to lack of this kind of data I needed badly and due to lack of equipement for doing real-time measuring of traffic-induced ground motion in my surroundings, I used some assumption and made "artificial" time histories. It's obvious that there just can't be two the same nor even two similar THs' taken on the same location and with the same traffic. Those THs' I provided for you are not "perfect" nor the same ones taken by the authors of the article but anyways now you have something for free and something you don't have to make on your own and waste your time. I believe those THs' are good for study and learning things. If you are going to use those THs' for making some serious calculations, do so at your own risk!
How it's made:
Article THs' are zoomed to 280% in Adobe reader, and the screenshots are taken. Those screenshots are copied to AutoCAD and scaled to make the TH fit the line 20 units of measure long (e.g. 20 millimeters long) - so one second equals one millimeter. THs’ (0,0) point of coordinate system was set to overlap the (0,0) of the AutoCAD just to make easier reading of the data (length of ordinates). The 20 second “long” line was divided into 400 segments. Vertical lines were drawn from each of the points defining the line segment. Those vertical lines were drawn in a way to cover the closest and highest peak of the TH. When I had all the segment points covered, I measured each of the vertical lines length and saved it into the excel spreadsheet. Each excel spreadsheet line contains 10 peeks (i.e. we have 10 columns in excel spreadsheet), thus we have 40 rows in excel spreadsheet which equals 400 points of TH. When all the peeks were entered to excel spreadsheet, I measured the absolute highest peak and two random peeks in AutoCAD and compared them to the original values provided in the article. Then I calculated the multiplier which will be used to convert data in excel spreadsheet to match the data in article. When this part of job was done all the data from excel spreadsheet was copied to some .txt file I newly created. To be sure the job was made as properly as possible; I imported the .txt file into SAP2000 to make time history function. Then I rechecked those previously random measured peeks (which matched almost perfectly). I made one more (maybe stupid) check; I took the screenshot of the SAP2000 window displaying TH and paste it to PowerPoint, cropped the screenshot so the TH is the only visible part of the screenshot. Then I copy-pasted the "original" TH screenshot used in AutoCAD to the same PowerPoint file and used option “Set transparent color” over it to remove the white color from the screenshot. I cropped the "original" screenshot, rescale it and moved over the SAPs' TH - the matching was almost perfectly. Do remember I was doing 3 time check per every 10 to 20 points entering to excel spreadsheet taken from AutoCAD just to be sure I didn't skip some of the data and to be sure I haven't made some other mistake in making the digitalization.
This British Standard guide explains and gives examples of principles that relate to accuracy in building construction. It is intended to be applied to building rather than civil engineering works and aims to assist in the following:
a) avoiding or resolving problems of inaccuracy or fit by assessing the dimensional needs of a design regarding tolerances, and then designing and specifying appropriately;
b) assessing the likely achievement of tolerances specified for a particular project, and giving guidance on their realization;
c) monitoring and controlling work during construction to ensure that it complies with
specified accuracy.
Appendices give information relating to site surveys, examples of the calculation of tolerances, characteristic accuracy values, and data from the BRE survey (see the introduction).
NOTE The titles of the publications referred to in this standard are listed on the inside back cover.
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One of the major challenges for many Mediterranean and other countries is finding viable solutions to tackle water shortage. Some of the major water quality constraints derive from the high salinity of groundwater and from pollution sources such as: untreated domestic sewage, fertilizers and pesticides from irrigation drainage, industrial effluents, and solid waste disposal. Wastewater treatment processes involving physico-chemical and biological treatment, chemical oxidation, membrane technologies, along with methods of solids concentration and disposal are of special relevance in dealing with these problems. This volume contains selected lectures presented at the NATO ADVANCED TRAINING COURSE held in Oviedo (November 15-21, 2009) and sponsored by the NATO Science for Peace and Security (SPS) Programme. They cover a variety of topics from wastewater treatment methods to cleaner production strategies, as a careful management of water resources is the basis for sustainable development and to avoid potential security threats. The reader will benefit from a general view of some of the operations involved in wastewater treatment and solid concentration and disposal methods. A proper water reuse and recycling, together with efficient solid disposal, would contribute to a better use of the resources and a sustainable economic growth, particularly in many arid lands of the world.
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Worksheet that contains macro to import CSI section catalog files *.pro file extension. It's work in progress so please contact me if you find any bugs or wish to add information.
Simply click Import button choose a file like euro.pro click ok.
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This article was taken of the civil engineering for practicing and design engineers (JOURNAL) Vol, Number 2, 1982.
It was scanned with high quality.
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I need a equivalent table about Chinese Structural Steel profile (HW 100×100~400×400; HN 400×200~900×300; HM 150×100~600×300) and the equivalent American or European profiles.
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