Existing reinforced concrete (RC) buildings designed prior to the 1970s are vulnerable to shear
failure of beam-column joints under earthquake excitations because of insufficient transverse
reinforcement in the joint region. The failure of such “unreinforced” joints, especially corner
joints, has played a crucial role in building collapses in past earthquakes. The accurate prediction
of shear strength and flexibility for these unreinforced beam-column joints is therefore essential
to assess the seismic risk of older-type RC buildings characterized by having unreinforced beamcolumn
joints. To predict shear strength, two shear-strength models were developed previously,
as a part of this larger study. A practical shear-strength model combining the two previously
developed models is presented in this report.
To validate the shear strength models and to develop a moment-rotation relationship
(backbone relationship) of unreinforced corner beam-column joint, four full-scale unreinforced
corner beam-column joint specimens with two orthogonal beams and floor slab were tested
under quasi-static cyclic load reversals simulating earthquake loading. The test results show that
the joint shear strengths decrease with increase of the joint aspect ratio, and for a certain joint
aspect ratio, the joint shear strengths are proportional to the beam longitudinal reinforcement
ratio within the range of variables investigated in the test matrix. The proposed three models
accurately predicted the shear strengths of the tested specimens. Based on the measured joint
responses and visual observations of the tested four corner joint specimens, a backbone
relationship was developed for nonlinear joint macro-modeling. Furthermore, the proposed
backbone relationship was modified to be applicable to interior and roof beam-column joints.
The strength parameters in the backbone relationships were defined using the proposed joint
shear strength models. These backbone relationships were validated by accurate reproduction of
the force-drift responses of the tested four corner joint specimens in this study and eight other
exterior and interior joint specimens taken from the literature. Using these backbone
relationships, nonlinear dynamic simulations were performed on three hypothetical prototype RC
building frames. These simulations indicate that consideration of the flexibilities for unreinforced
joints is important for seismic assessment of older-type RC buildings characterized by having
unreinforced joints.
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A concise introduction to structural dynamics and earthquake engineering
Basic Structural Dynamics serves as a fundamental introduction to the topic of structural dynamics. Covering single and multiple-degree-of-freedom systems while providing an introduction to earthquake engineering, the book keeps the coverage succinct and on topic at a level that is appropriate for undergraduate and graduate students. Through dozens of worked examples based on actual structures, it also introduces readers to MATLAB, a powerful software for solving both simple and complex structural dynamics problems.
Conceptually composed of three parts, the book begins with the basic concepts and dynamic response of single-degree-of-freedom systems to various excitations. Next, it covers the linear and nonlinear response of multiple-degree-of-freedom systems to various excitations. Finally, it deals with linear and nonlinear response of structures subjected to earthquake ground motions and structural dynamics-related code provisions for assessing seismic response of structures.
Chapter coverage includes:
Single-degree-of-freedom systems
Free vibration response of SDOF systems
Response to harmonic loading
Response to impulse loads
Response to arbitrary dynamic loading
Multiple-degree-of-freedom systems
Introduction to nonlinear response of structures
Seismic response of structures
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Novel Approaches to Improving High Temperature Corrosion Resistance - EFC 47
Author: Michael Schutze, W. J. Quaddakkers | Size: 13.80 MB | Format:PDF | Quality:Original preprint | Publisher: CRC Press | Year: 2008 | pages: 648 | ISBN: 142007959X, 9781420079593
High-temperature corrosion is a major problem affecting sectors such as the power generation, aerospace and metal-working industries. This important book summarizes a wide range of research on ways of dealing with this important problem. The first part of the book reviews ways of modifying alloys to improve high-temperature corrosion resistance. The second part discusses surface treatments such as pre-treatments and coatings. The third part of the book summarizes research on testing for high-temperature corrosion resistance and the development of common testing standards. It also reviews research on the behavior of alloys in a wide range of service conditions such as furnace and boiler environments. The final part of the book discusses ways of modelling high-temperature corrosion processes to improve material performance and service life.
With its distinguished editors and team of contributors drawn from some of the leading centers of research in the field, Novel approaches to improving high-temperature corrosion resistance will be a standard reference for all those studying and dealing with high-temperature corrosion.
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Authors:James C. Anderson, Farzad Naeim
ISBN: 978-0-470-87939-9
Hardcover
288 pages
August 2012
Description:
A concise introduction to structural dynamics and earthquake engineering
Basic Structural Dynamics serves as a fundamental introduction to the topic of structural dynamics. Covering single and multiple-degree-of-freedom systems while providing an introduction to earthquake engineering, the book keeps the coverage succinct and on topic at a level that is appropriate for undergraduate and graduate students. Through dozens of worked examples based on actual structures, it also introduces readers to MATLAB, a powerful software for solving both simple and complex structural dynamics problems.
Conceptually composed of three parts, the book begins with the basic concepts and dynamic response of single-degree-of-freedom systems to various excitations. Next, it covers the linear and nonlinear response of multiple-degree-of-freedom systems to various excitations. Finally, it deals with linear and nonlinear response of structures subjected to earthquake ground motions and structural dynamics-related code provisions for assessing seismic response of structures.
Chapter coverage includes:
Single-degree-of-freedom systems
Free vibration response of SDOF systems
Response to harmonic loading
Response to impulse loads
Response to arbitrary dynamic loading
Multiple-degree-of-freedom systems
Introduction to nonlinear response of structures
Seismic response of structures
If you're an undergraduate or graduate student or a practicing structural or mechanical engineer who requires some background on structural dynamics and the effects of earthquakes on structures, Basic Structural Dynamics will quickly get you up to speed on the subject without sacrificing important information.
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Design of Cold-formed Steel Structures: Eurocode 3: Design of Steel Structures. Part 1-3 Design of cold-formed Steel Structures
ECCS - European Convention (Editor), Associacao Portuguesa de (Editor)
ISBN: 978-3-433-02979-4
Paperback
512 pages
October 2012
Description:
The book is concerned with design of cold-formed steel structures in building based on the Eurocode 3 package, particularly on EN 1993-1-3.
It contains the essentials of theoretical background and design rules for cold-formed steel sections and sheeting, members and connections for building applications.
Elaborated examples and design applications - more than 200 pages - are included in the respective chapters in order to provide a better understanding to the reader.
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I'm looking for this paper for depth factor of Fox (1948)
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May we share here the process of approval of development plans ( both architectural and structural plans) in your respective countries by the respective authorities.
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3- Complete registry and Copy link that i highlight
4- Activate by phone
5- Add it to firefox
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Posted by: pezhmankhan - 01-06-2013, 07:08 AM - Forum: Archive
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Dear Friends,
I need this document:
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