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Conceptual Seismic Design Guidance for New Reinforced Concrete Framed Infill Buildings
Author: Shabnam J. Semnani, Stanford University Janise E. Rodgers, GeoHazards International Henry V. Burton, Stanford University | Size: 3.5 MB | Format:PDF | Quality:Unspecified | Publisher: Earthquake Engineering Research Institute Thornton Tomasetti Foundation | Year: march 2014
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Dear friends,
If anyone help download this article
A ROBERTSON
THE STRENGTH OF STRUTS
ICE Selected Engineering Papers, Volume 1, Issue 28, 01 January 1925
DOI
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Article/eBook Full Name: Mechanical Behavior of Materials - Engineering Methods for Deformation, Fracture and Fatigue
Author(s): Norman E. Dowling
Edition: Third Edition / Fourth Edition
Publish Date: 2006 / 2012
ISBN: ISBN-13: 978-0131395060 ISBN-10: 0131395068
Published By: Prentice Hall
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Threat evaluations due to bombing and progressive collapse of precast concrete building systems are examined and presented in this report. A prototype structure based on the moment frame building system from PCI-Seismic Design for Precast/Prestressed Concrete Structures is used for these evaluations. Two distinct studies are conducted. The first examines the potential for abrupt failure of the ground level columns due to intentional detonation of explosives; the second examines the potential for progressive collapse of the building system as a result of this loss. Three types of column failures, including brisance failure, flexural failure, and direct shear failure are discussed and evaluated based on blast oad effects. For each failure case, the number of failed columns respect to stand-off ranges
with specified weight of charges is determined by employing UFC-3-340-02. A pictorial representation of the stand-off distances and number of failed columns are provided to assess the combined effects of blast load types with a specified charge weight. The generalized image provides a safe-range for each failure type. This methodology can be used to guide engineers in making enhancement to columns based or safe standoff ranges to ensure that safe operating levels are satisfied. In progressive collapse analysis section, the structure is examined using the procedures of the Unified Facilities Criteria (UFC) and the General Services Administration (GSA). Three model cases are compared: original model, modified model with cantilever continuous beam, and modified model with fixed-fixed continuous beam, analyze progressive collapse responses and make modifications by employing linear static procedure. The current GSA progressive collapse guidelines and UFC progressive collapse design are used for evaluations, and the commercially available structural analysis program ETABS Nonlinear V9.7.1 is utilized to perform example analyses.
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Stability of metal structures: a world view (part 1-4)
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A clear understanding of the effects of torsion on concrete members is essential to the safe, economical design of reinforced and prestressed concrete members. This report begins with a brief and systematic summary of the 180-year history of torsion of structural concrete members, new and updated theories and their applications, and a historical overview outlining the development of research on torsion of structural concrete members. Historical theories and truss models include classical theories of Navier, Saint-Venant, and Bredt; the three-dimensional (3-D) space truss of Rausch; the equilibrium (plasticity) truss model of Nielson as well as Lampert and Thürlimann; the compression field theory (CFT) by Collins and Mitchell; and the softened truss model (STM) by Hsu and Mo.
This report emphasizes that it is essential to the analysis of torsion in reinforced concrete that members should: 1) satisfy the equilibrium condition (Mohr’s stress circle); 2) obey the compatibility condition (Mohr’s strain circle); and 3) establish the constitutive relationships of materials such as the “softened” stress-strain relationship of concrete and “smeared” stress-strain relationship of steel bars. The behavior of members subjected to torsion combined with bending moment, axial load, and shear is discussed. This report deals with design issues, including compatibility torsion, spandrel beams, torsional limit design, open sections, and size effects.
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