Grouting of Bridge Post-Tensioning Tendons Training Manual
Grouting of Bridge Post-Tensioning Tendons Training Manual
Produced by the State of Florida Department of Transportation
State Construction Office - Tallahassee, Florida,
In Cooperation with the Federal Highway Administration
July 2002 edition
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Posted by: yanburak - 09-27-2010, 07:05 AM - Forum: Archive
- No Replies
I've been searching these papers.
Could someone help me and give me a download link?
1. Space Trusses with Brittle-Type Strut Buckling
Journal of the Structural Division, Vol. 102, No. 7, July 1976, pp. 1479-1492
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2. Ultimate Load Testing of Space Trusses
Journal of the Structural Division, Vol. 108, No. 6, June 1982, pp. 1324-1335
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I wonder why there is an option of inserting hyperlink in creating thread or reply if it is being regulated. I was given warning by using this option instead of using transparent link.
I suggest to delete this option so that others will not be confused in using this alternative to provide link information.
NONLINEAR FINITE ELEMENT MODELING AND CHARACTERIZATION OF GUYED TOWERS UNDER SEVERE LOADING
Guyed towers have been widely employed in the telecommunication industry. However, in current building codes, there is still no comprehensive specification for their nonlinear response under severe loads, which includes large static loads, seismic loads and impulsive loads. This study thus intends to improve the understanding and analysis of guyed towers that undergo not only large deformation, but also large strain. Impulsive loads are potential threat to the safety of guyed towers besides wind load, earthquake, and ice storm. No methodology or related research has been conducted in this area so far. This research explores the area using an already developed P-I diagram method and nonlinear finite element modeling to provide an efficient and effective way for structural integrity evaluation for guyed towers.
The mechanical characteristics of basic components of guyed towers are investigated first. Geometric nonlinearity is of the main concern for the impact of large deflection. The modified Riks scheme has been applied in nonlinear static analysis and the Newmark beta method for dynamic analysis. To investigate the efficiency and effectiveness of linear analysis methods, several corresponding examples are studied. It is found that linear static analysis works only when the deformation is small. The equivalent inertia force method and the large additional stiffness method for guyed towers under seismic loads are compared and validated. Their results are very similar.
Because guyed towers with large defection also have large strain in some parts, material nonlinearity is introduced by improving the existing FEM codes for trusses and cables. Isotropic hardening is employed in nonlinear static analysis. Dynamic hardening is used in dynamic analysis. Some specific examples have been conducted to verify the improvements. It is found that the improved methodology can well predict the performance of structures and tremendous difference exists between elastic analysis and inelastic analysis. Under seismic loading condition, inelasticity in material can help dissipate the inputted seismic energy and reduce the intensity of structural response.
The combined application of nonlinear finite elements and algorithm enables the nonlinear analysis for guyed towers. A 50 ft guyed tower with taut cables and a 100 m guyed tower with sagged cables were studied for their response under large static loads and seismic loads. The nonlinear static and dynamic response was accurately traced. It is found that equivalent static analysis works well when deflection is small. In sagged guyed tower, the structure is relatively soft at the beginning of static loading. With the increase of deflection, the structure is gradually stiffened. The consideration of inelasticity greatly improves the accuracy of analysis.
To evaluate the guyed tower’s safety under impulsive loads, relative P-I formulas have been derived based on existing transverse velocity profiles of rigid plastic beams under impulsive loads. Two failure modes (shear failure and bending failure) were differentiated. The impact of boundary condition and load types on the response is investigated. It is found under certain conditions only one failure mode is possible. But shear failure and bending failure can coexist under very severe impulsive loads. One specific example has been used to demonstrate the combined application of the P-I diagram method and FEM. Most guyed towers are expected to survive light or medium impulsive loads due to their high redundancy and small loading area.
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The IMSL C Numerical Library provides advanced mathematical and statistical functionality for programmers to embed in their existing or new applications. Written in standard C, the IMSL C Library can be embedded into any C or C++ application as well as any existing application that can reference a C library.
Using PyIMSL, developers also have the option to write programs in Python that leverage algorithms in the IMSL C Library. PyIMSL is a collection of Python wrappers to the mathematics and statistical algorithms in the IMSL C Library and is available either as a separate download or as part of the PyIMSL Studio product.
Typical Application Areas
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Modeling and simulation in high performance computing
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ISVs embedding mathematical engines into their software offerings
The IMSL C Numerical Library version 7.0 release provides improved performance in multi-core environments through the parallelization of numerous algorithms using OpenMP and greater depth of functionality via new and updated algorithms. In addition to these enhancements , the IMSL C Library is tuned and validated for compatibility, numerical accuracy, and performance on widely adopted platforms, including:
Common 32-bit and 64-bit microprocessor architectures
Operating Systems including Linux, Unix, Windows
Compilers including gcc, Intel, Microsoft, Sun, IBM
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I want to work on a research in structural engineering. The research should make use of STAAD or other Bentley products. Any ideas or suggestions will be helpfull.
Base plate design based on BS code except for shear lug design for which AISC ASD has been used.
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Comprehensive and up-to-date, the text integrates major construction management topics with an explanation of the methods of heavy/highway and building construction. It incorporates both customary U.S. units and metric ( SI) units and is the only text to present concrete formwork design equations and procedures using both measurement systems. This edition features information on new construction technology, the latest developments in soil and asphalt compaction, the latest developments in wood preservation and major health, safety and environmental concerns. Explains latest developments in soil and asphalt compaction. Presents the latest developments in wood perservation materials and techniques which respond to environmental concerns. Expanded and updated coverage of construction safety and major health hazards and precautions. Designed to guide construction engineers and managers in planning, estimating, and directing construction operations safely and effectively.
Here is the link for one of your book
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Manual for Design and Detailings of Reinforced Concrete to Code of Practice for Structural Use of Concrete 2004
Author: Professor A.K.H. Kwan
As computer methods have been extensively used nowadays in analysis and design, the … derivation of design formulae and charts for beams … for ultimate reinforced concrete design …Acknowledgement We would like to express our greatest gratitude to Professor A.K.H. Kwan of The University of Hong Kong who has kindly and generously provided invaluable advice and information during the course of our drafting of the Manual. His advice is most important for the accuracy and completeness of contents in the Manual.
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Principles of Continuum Mechanics: A Study of Conservation Principles with Applications
Principles of Continuum Mechanics: A Study of Conservation Principles with Applications
By J. N. Reddy
Publisher: Cambridge University Press
Number Of Pages: 244
Publication Date: 2010-06-28
ISBN-10 / ASIN: 0521513693
ISBN-13 / EAN: 9780521513692
Product Description:
As most modern technologies are no longer discipline-specific but involve multidisciplinary approaches, undergraduate engineering students should be introduced to the principles of mechanics so that they have a strong background in the basic principles common to all disciplines and are able to work at the interface of science and engineering disciplines. This textbook is designed for a first course on principles of mechanics and provides an introduction to the basic concepts of stress and strain and conservation principles. It prepares engineer-scientists for advanced courses in traditional as well as emerging fields such as biotechnology, nanotechnology, energy systems, and computational mechanics. This simple book presents the subjects of mechanics of materials, fluid mechanics, and heat transfer in a unified form using the conservation principles of mechanics.
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