An excel spreadsheet written to analyze and design concrete one cell box culverts.
I have written this spreadsheet for a project which contains design of some culverts. I have uploaded it to let all of you civileans comment on that in order to make it more complete.
Thanks in advance.
Regards,
Ali Akbar
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The seismic response of a single-story asymmetric structure supported on various base isolation systems during impact with adjacent structures is investigated. Eccentricities arising due to elastic forces in the columns at the top-deck and the restoring forces in the isolation systems at the base-raft are considered. The adjacent structures (i.e. retaining walls or entry bridges) surrounding the base-isolated structure on all four sides are modeled in the form of springs and dashpots. The coupled differential equations of motion for the isolated system are derived and solved in incremental form using Newmark’s method to obtain the seismic response with and without impact. The variation of superstructure acceleration and isolation level displacement during impact upon the adjacent structures under the action of real earthquakes are computed to study the behavior of torsionally coupled structures and compare the performance of various isolation systems. The torsional impact response of isolated structures is studied under the variation of important system parameters such as the sizes of gaps, the stiffness of adjacent structures, superstructure flexibility and different eccentricities in the base-isolated structure. It is concluded that the lateral-torsional response of the base-isolated structure is adversely affected when impact takes place with the adjacent structures. The superstructure acceleration increases and the base-raft displacement decreases due to impact with the adjacent structures; nevertheless, the isolation remains effective as compared to the nonisolated case.
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Matsagar VA, Jangid RS (2010), "Impact Response of Torsionally Coupled Base-isolated Structures", Journal of Vibration and Control, Vol 16, No 11, pp 1623-1649.
I have a suggestion to open a discussion on how to improve "Engineering Problems" section.
Going thru the section we can see that most of the time questions are asked without proper data and people who are trying to help end up asking for more info in order to help.
Considering the person who has a difficult situation in hand, I think we may try to come up some come kind of fill-in the blanks approach for them to post their questions and get answers faster
For example in Engineering books there are a lot of formats, we can gather a format for different types of questions.
I am just making up some format here just to get this topic started:
1- Question is about: Analysis, design, foundation, beam, concrete , wood, etc (Say: Analysis)
2- Given: Applied code, loading, sketch of the problem (a picture worth a lot of words)
3- Answer requested for: (Having difficulty with ......?)
I think doing something like this will encourage forum members to answer the questions., and forum activity increases.
The person who is asking the question gets better and faster answers.
Saves time for everybody
Dear friends,
I need: The design and construction of filled building platforms
Denis Patrick McNicholl
Proceedings of the ICE - Geotechnical Engineering, Volume 164, Issue 2, 01 April 2011
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World Engineers’ Convention 2011 Geneva 4-9 september
PDF of all the papers is in the PDF map
index.html allows you to search by topic all papers on following topics of WEC2011:
• Urban development and buildings
• Mobility and transport
• Education in engineering
• Energy conversion and distribution
• Global challenges
• Rational end-use and large customers
• Renewable energy and storage
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Easy, inexpensive, do-it-yourself solar energy projects
Featuring step-by-step instructions and useful photos and illustrations, this hands-on guide is filled with solar energy solutions you can put to use right away. Solar Power for Your Home shows you how to set up a variety of simple, money-saving solar projects quickly and easily, such as a solar water heater, a solar pool pump, solar lighting, a solar oven--and even a solar-powered lawn mower!
Learn all about the different types of solar technologies, including passive solar and photovoltaic, and determine which best suits your projects. You'll get details on assessing current energy use in your home, estimating the costs of solar installations, and calculating your overall savings. Reduce your carbon footprint--and your energy costs--with help from this practical resource.
Solar Power for Your Home covers:
*History, benefits, and potential detriments of solar energy
*Fundamentals of solar technologies--passive solar, photovoltaic, concentrating solar energy, and more
*Evaluating home electricity consumption
*Creating a personal energy plan
*How and when to contract your solar project
*Emerging technologies--thin film, nano, and hybrid solar and solar storage
*Funding options including rebates, incentives, and grants
*Standards, conversions, and helpful resources
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This reference gets you up to speed on mathematical modeling for environmental and water resources management. With a practical, application-oriented approach, it discusses hydrodynamics, sediment processes, toxic fate and transport, and water quality and eutrophication in rivers, lakes, estuaries, and coastal waters. A companion CD-ROM includes a modeling package and electronic files of numerical models, case studies, and model results. This is a core reference for water quality professionals and an excellent text for graduate students.
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