Calculating wind resistance is one important process in the design of highway bridges. The current codes of many countries include different rules and formulas regarding the calculation of wind resistance. In this paper, the transverse‐direction wind loads on long‐span girder bridges with tall piers were calculated using six codes from different countries under various terrain, pier height, and girder length conditions. The pier‐bottom shear force and moment results of transverse wind loads calculated using these six codes were compared to those obtained using the buffeting frequency domain method. Results showed that, in class B terrain, wind load results predicated by China's 2004 general codes for the design of highway bridges and culverts, China's 2004 wind‐resistant design specifications for highway bridges, Japan's 2007 wind resistant design manual for highway bridges, and part two of Britain's 2006 steel, concrete, and composite bridge specifications for loads resembled each other closely. Some difference was found to exist among class A, C, and D terrain. The 2007 AASHTO LRFD bridge design specifications and China's 2001 load codes for the design of building structures showed significant differences from the other four codes on all kinds of terrain. The applicability of the wind load rules in the AASHTO LRFD bridge design specifications to long‐span girder bridges with tall piers merits further discussion. China's wind load calculations of load code for the design of building structures mainly depended on the experience parameters of architectural structures with large dimensions, and had limited applicability to bridge structures. For long‐span girder bridges with tall piers, such as bridges with span length to width or depth ratios exceeding 30 or pier height to transverse width ratio exceeding 10.7, the wind load calculated using these codes was generally underestimated due to the neglect of the effects of aeroelastic forces, which must be taken into account in the design of these kinds of bridges.
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Buckling Analysis of a Long‐Span Roof Structure Collapsed during Construction
Author: N. Augenti1 and F. Parisi2 | Size: 3.41 MB | Format:PDF | Publisher: ASCE | Year: 2011 | pages: 46
Numerical simulation of damage and collapse mechanisms suffered by engineering structures can be an effective tool for a quantitative assessment of their causes. Large displacement inelastic analysis may be required in the case of highly flexible structures such as steel roofs which frequently experience large failures or even collapse owing to buckling. This paper deals with the collapse of a long‐span steel roof structure which fell down suddenly during construction as a result of an out‐of‐plane buckling phenomenon induced by a gust of wind. Forensic investigations were carried out on behalf of the judicial authority in order to identify the causes of the accident. Based on detailed information gathered from site surveys and project documents, a three‐dimensional numerical model of the as‐built structure was created and buckling analyses were performed to assess the safety level at the moment of the collapse. The as‐built structure was braced through some purlins and steel cables fixed at the ground level. Structural stability was also investigated under further modeling assumptions to compare the effectiveness of several bracing systems in preventing the collapse. Analysis results showed that the as‐built structure was in an unstable equilibrium condition when the wind breeze occurred. Temporary bracing elements installed on the structure instead of concentric roof braces were not sufficient to ensure the overall stability.
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Estimating Fire Resistance Time of Steel Beam and Column Protected by Fire Protection Insulation
Size: 340 KB
The following calculations made by US Nuclear Regulatory Commision for estimate the fire resistance time for structural steel beams and columns protected by spray-applied fire protection insulating material.
Calculation reference :Buchanan, A. H., "Structural Design for Fire Safety", 2001, Page 179. "Analytical Methods for Determining Fire Resistance of Steel Members," "SFPE Handbook of FireProtection Engineering", 3rd Edition, 2002, Page 4-209.
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Author: A. E. Bennett, Louis J. Siy | Size: 22.1 MB | Format:PDF | Publisher: Delmar, Cengage Learning | Year: 2009 | pages: 440 | ISBN: 13: 978-1-4283-3528-5
Now in its eighth edition, this hands-on blueprint reading guide contains the most comprehensive, up-to-date coverage of welding symbols and their application to welding prints and practices. BLUEPRINT READING FOR WELDERS, 8th Edition provides the knowledge needed to interpret all types of working sketches and prints, from the simplest to the most complex, through step-by-step instructions. Both AWS and ISO welding symbols are included, along with prints at the end of each unit. The book's advanced coverage includes auxiliary views, detail views, projections, sections, and detail and assembly drawings. This latest edition incorporates changes that reflect the most current weld symbols, dimensioning practices, and specifications used on prints, so readers can feel confident they are getting cutting-edge information that they can easily apply to work in the field.
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Hello Freinds
can anybody upload prEN 12255-2. Wastewater treatment plants (over 51 PE). Part 2. Performance requirements of raw wastewater pumping installations. Any help is highly appreciated
Regards
The Architect's Studio Companion, 3rd Edition >> By Edward Allen (Author), Joseph Iano (Author)
Author: Edward Allen, Joseph Iano | Size: 4.9 MB | Format:PDF | Publisher: Wiley; 3 edition | Year: July 27, 2001 | pages: 417 | ISBN: ISBN-10: 0471392359 ISBN-13: 978-0471392354
1.Book Description
Expert technical guidance for the earliest stages of building design
This laborsaving resource reduces complex engineering and building code information to simple approximations that can be easily incorporated into initial design explorations. It helps architects prepare buildable preliminary designs as a realistic basis for the more detailed design development stage that will follow.
Completely revised to reference the new International Building Code, this fully updated Third Edition responds to the growing interest in sustainable design solutions with a new section on daylighting. Like its predecessors, this new edition offers quick access to reliable rules of thumb that offer vital help for:
Selecting, configuring, and sizing the structural system
Selecting heating and cooling systems
Configuring and sizing mechanical and electrical systems
Configuring and sizing egress systems
Designing within building code height and area limitations
The Architect’s Studio Companion, Third Edition is a recommended study reference for the Building Planning section of the Architect’s Registration Exam and an invaluable sourcebook that can save architects time and effort throughout their careers.
2.Editorial Reviews
2.1.From the Publisher
This must-have reference guides architects through the preliminary-design phase of building projects. It reduces complex engineering and building code information to simple formal and spatial approximations which are readily incorporated into initial design work. Formatted for quick and easy use by index tabs and comprehensive cross-references. This edition has been extensively updated to reflect important changes in the major building codes for the US and Canada. It also features enhanced charts and tables, ADA compliance data and new structural information on assigning approximate sizes to beams and columns. --This text refers to an out of print or unavailable edition of this title.
2.2.From the Back Cover
Expert technical guidance for the earliest stages of building design
This laborsaving resource reduces complex engineering and building code information to simple approximations that can be easily incorporated into initial design explorations. It helps architects prepare buildable preliminary designs as a realistic basis for the more detailed design development stage that will follow.
Completely revised to reference the new International Building Code, this fully updated Third Edition responds to the growing interest in sustainable design solutions with a new section on daylighting. Like its predecessors, this new edition offers quick access to reliable rules of thumb that offer vital help for:
Selecting, configuring, and sizing the structural system
Selecting heating and cooling systems
Configuring and sizing mechanical and electrical systems
Configuring and sizing egress systems
Designing within building code height and area limitations
The Architect’s Studio Companion, Third Edition is a recommended study reference for the Building Planning section of the Architect’s Registration Exam and an invaluable sourcebook that can save architects time and effort throughout their careers.
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The striking T-center St. Marx Vienna was designed and built by the architects, Günther Domenig, Hermann Eisenköck and Herfried Peyker. Recently completed, the project has 119 000 m2 of usable floor space and contains offices for 3000 employees. Unusually proportioned, the building can be described as a reclining sculpture 60 m high and 255 m long with a 40 m wing cantilevering out. From a town-planning perspective this building represents the first step in the development of a new district on the site of the former St. Marx abattoir and cattle sheds. This book documents the design and building process of this spectacular building illustrated with a large number of detailed drawings and photos of the construction itself.
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A Method of Computation for Structural Dynamics
by Nathan M. Newmark, F.ASCE, (Head, Dept. of Civ. Engrg., Univ. of Illinois, Urbana, IL)
Journal of the Engineering Mechanics Division, Vol. 85, No. 3, July 1959, pp. 67-94
It says it is available here:
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If for example an user uploads an image with CivilEA image tool and realizes that the image was wrong how can he/she delete it?
It happened to me and I don't want to fill the hosting space with useless data.
Is there an option for that and I didn't find it?
Should I contact and request that from a moderator? But they are already busy.
Is there an automatic system already implemented that deletes all images that are not being used inside forum? This can be very useful because user can upload image and reuse link (share it) outside of civilea.
18 Masonry Design spreadsheet - US Units - Daniel T. Li
Size: 2.8 MB
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