STRENGTH AND DRIFT CAPACITY OF GFRP- REINFORCED CONCRETE SHEAR WALLS
Author(s)/Editor(s): Nayera Ahmed Abdel-Raheem Mohamed A dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy (Civil Engineering) | Size: 4.2 MB | Format:PDF | Quality:Unspecified | Publisher: Sherbrooke (Québec) Canada | Year: 2013 | pages: 173
With the rise in constructing using FRP reinforcement, owing to corrosion problems in steel- reinforced structures, there is a need for a system to resist lateral loads induced from wind and earthquake loads. The present study addressed the applicability of reinforced-concrete shear walls totally reinforced with glass-fiber-reinforced polymer (GFRP) bars to attain reasonable strength and drift requirements as specified in different codes. Four large-scale shear walls – one reinforced with steel bars (as reference specimen) and three totally reinforced with GFRP bars – were constructed and tested to failure under quasi-static reversed cyclic lateral loading. The GFRP-reinforced walls had different aspect ratios covering the range of medium-rise walls. The reported test results clearly showed that properly designed and detailed GFRP- reinforced walls could reach their flexural capacities with no strength degradation, and that shear, sliding shear, and anchorage failures were not major problems and could be effectively
controlled. The results also showed recoverable and self-centering behavior up to allowable drift limits before moderate damage occurred and achieved a maximum drift meeting the limitation of most building codes. Acceptable levels of energy dissipation accompanied by relatively small residual forces, compared to the steel-reinforced shear wall, were observed.
Finite element simulation was conducted and the analyses captured the main features of behavior. Interaction of flexural and shear deformations of the tested shear walls was investigated. It was found that relying on the diagonal transducers tended to overestimate shear distortions by 30% to 50%. Correcting the results based on the use of vertical
transducers was assessed and found to produce consistent results. Decoupling the flexural and shear deformations was discussed. Using GFRP bars as elastic material gave uniform distribution of shear strains along the shear region, resulting in shear deformation ranging from 15 to 20% of total deformation. The yielding of the steel bars intensified the shear strains at the yielding location, causing significant degradation in shear deformation ranging from 2 to 40% of total deformation. The results obtained demonstrated significantly high utilization levels of such shear wall type, therefore, primary guidelines for seismic design of GFRP- reinforced shear wall in moderate earthquakes regions was presented, as no design guidelines for lateral load resistance for GFRP-reinforced walls are available in codes. The ultimate limit
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Rule-based rain gauge network design in urban areas aided by spatial kernel density
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The analysis and formulation are provided for a variety of topics in inviscid and viscous fluid dynamics; it is hoped with analytical and physical insight. In part, this means formulating the appropriate equations and transforming them into a suitable form for the specific flow under scrutiny. The approach is applied to viscous boundary layers, shock waves, and numerous other flows, including asymmetric thrust
nozzles and supersonic diffusers. Of special interest are the analytical process and the corresponding physical interpretation.
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Paper title: An evaluation framework for identifying the optimal raingauge network based on spatiotemporal variation in quantitative precipitation estimation
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PCA Design and Control of Concrete Mixtures 15th Edition
Author(s): M. L. Wilson (Author), S. H. Kosmatka (Author)
Published By:PCA
Published Year:January 30, 2011
Size: 31 MB
Quality:Original preprint
Abstract: This book presents the properties of concrete as needed in concrete construction, including strength and
durability. All concrete ingredients (cementing materials, water, aggregates, admixtures, and fibers) are reviewed for
their optimal use in designing and proportioning concrete mixtures. Applicable ASTM, AASHTO, and ACI standards
are referred to extensively. The use of concrete from design to batching, mixing, transporting, placing, consolidating,
finishing, and curing is addressed. Concrete sustainability, along with special concretes, including high-performance
concretes, are also reviewed.
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IS 14732: Guidelines for the Evaluation of the Response of Occupants of Fixed Structures, Especially Buildings and Off-Shore Structures, to Low-Frequency Horizontal Motion (0.063 to 1 Hz)
Hi
For ISO 6897:1984 (this is an India standard that is identical to ISO 6897:1984)
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Size: 592 MB | Format:PDF | Quality:Scanner | Publisher: The National Frame Building Association’s (NFBA) | Year: 1999 | pages: 105 | ISBN: ASIN: B000TXDJDI
More about NFBA:
NFBA is the only national trade association that represents post-frame industry professionals. The association exists to support its members and stimulate the growth of the post-frame industry. To do so, the association helps its members by providing industry tools and code resources, education, access to technical and legal experts, builder accreditation programs, newsletters and post-frame market development updates, and networking opportunities.
NFBA is a non-profit trade association that promotes the interests of the post-frame construction industry and its members. The association’s members are primarily post-frame builders, suppliers, manufacturers, building material dealers, code and design professionals, and structural engineers.
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When Frankipile South Africa first published "The Guide" in 1976 the main purpose was to create a practical reference on all aspects of soil investigation and piling as carried out by the company in Southern Africa at that time. Judging from the popularity of the first edition this objective was achieved and most design engineers in Southern Africa have a copy on their bookshelves.
The second edition was published in 1986 as an update of the first and it was equally popular. This, the third edition, is in fact a re-write of the book as Frankipile has expanded its activities into soil improvement and lateral support as well as environmental engineering. The name of the Guide has thus changed to include all aspects of Geotechnical Engineering as carried out by the Company in Southern Africa.
The purpose of the book, however, remains the same; it is a reference with a wealth of practical information on geotechnical topics which we are confident all those who receive a copy will find extremely useful. The contents of this book are presented in good faith. As in all geotechnical design the methods and data presented in the book must be interpreted and used with a degree of knowledge, experience and judgement. Frankipile South Africa (Pty) Ltd does not hold itself in any way responsible for any inaccuracies or errors in the book or for any interpretation thereof by persons other than its own employees.
The company acknowledges, with appreciation, the contribution by Messrs. OVE ARUP & PARTNERS to the section on pilecap design.
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Structural Steel Design to Eurocode 3 and AISC Specifications deals with the theory and practical applications of structural steel design in Europe and the USA. The book covers appropriate theoretical and background information, followed by a more design‐oriented coverage focusing on European and United States specifications and practices, allowing the reader to directly compare the approaches and results of both codes. Chapters follow a general plan, covering: A general section covering the relevant topics for the chapter, based on classical theory and recent research developments A detailed section covering design and detailing to Eurocode 3 specification A detailed section covering design and detailing to AISC specifications Fully worked examples are using both codes are presented. With construction companies working in increasingly international environments, engineers are more and more likely to encounter both codes. Written for design engineers and students of civil and structural engineering, this book will help both groups to become conversant with both code systems.
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