Author: Publisher:
ISBN:
Category : Civil engineering
Languages : en
Pages : 616
Book Description
Static and Dynamic Loading of Pretensioned Concrete Beams
Author: S. K. TakahashiPublisher:
ISBN:
Category : Blast effect
Languages : en
Pages : 104
Book Description
A study was made to determine how flexural members should be designed, how to gain the greatest resistance to blast loading, where they should be used, and the best way to destroy structures composed of such members. Nine simply supported pretensioned beams were tested in the blast simulator either statically or dynamically. In the dynamic tests the beams were subjected to long- and short-duration loading. As expected, the load capacity of the beams subjected to short duration loads was greater than that of those subjected to long-duration loads. The deflection time traces showed that no tensile stresses occurred in the top fiber for any of the loads applied and that a permanent deformation can be considered negligible for loads less than 85% of the ultimate load. A method of predicting the static ultimate deflection is presented and applied to one of the beams. The experimental data is compared with the theory. All of the statically tested beams failed in bond near the supports. In the dynamic tests, two beams failed by concrete compression at mid-span, and the rest failed in bond. A solution for dynamic response, which includes damping, is shown and applied to one of the tests. (Author).
Technical Report
Author: Guide to Technical Documents
Author: Naval Civil Engineering Laboratory (Port Hueneme, Calif.)Publisher:
ISBN:
Category : Bibliographical services
Languages : en
Pages : 374
Book Description
Principles of Chemical Engineering Processes
Author: Nayef GhasemPublisher: CRC Press
ISBN: 0415468507
Category : Science
Languages : en
Pages : 478
Book Description
Written in a clear, concise style, Principles of Chemical Engineering Processes provides an introduction to the basic principles and calculation techniques that are fundamental to the field. The text focuses on problems in material and energy balances in relation to chemical reactors and introduces software that employs numerical methods to solve these problems. Upon mastery of this material, readers will be able to: Understand basic processing terminology (batch, semibatch, continuous, purge, and recycle) and standard operations (reaction, distillation, absorption, extraction, and filtration) Draw and fully label a flowchart for a given process description Choose a convenient basis for calculation for both single- and multiple-unit processes Identify possible subsystems for which material and energy balances might be written Perform a degree of freedom analysis for the overall system and each possible subsystem, formulating the appropriate material and energy balance equations Apply the first law of thermodynamics, calculate energy and enthalpy changes, and construct energy balances on closed and open systems Written as a text to fully meet the needs of advanced undergraduate students, it is also suitable as a reference for chemical engineers with its wide coverage across the biochemical and electromechanical fields. Each chapter of the text provides examples, case studies, and end-of-chapter problems, and the accompanying CD-ROM contains software designed for solving problems in chemical engineering.
Fatigue Life of Prestressed Concrete Beams
Author: ReinforcePublisher: ASCE Publications
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 100
Book Description
Prepared by the Reinforced Concrete Research Council of ASCE. This report reprints a collection of studies advancing the knowledge of the effects of fatigue loading on the structural behavior of prestressed concrete flexural members. Each study represents one phase of an extensive research program conducted at Lehigh University and sponsored by the Pennsylvania Department of Transportation, the Federal Highway Administration, and the Reinforced Concrete Research Council. The four areas of study are: the effect of stress gradient on the probable fatigue life of plain concrete, as related to the compression block of prestressed concrete flexural members; the probable fatigue life of seven-wire prestressing strand under repeated loading of either constant or varied magnitude; the probable fatigue life of prestressed concrete flexural members, as limited by the fatigue failure of the prestressing strand; and the susceptibility of prestressed concrete flexural members to fatigue failure in shear. This report provides guidance to structural engineers faced with the design or analysis of prestressed concrete flexural members and to research engineers who are seeking to extend the knowledge of structural behavior as affected by repeated loading.
Journal of the American Concrete Institute
Author: American Concrete InstitutePublisher:
ISBN:
Category : Concrete
Languages : en
Pages : 540
Book Description
Navy Civil Engineer
Author: U.S. Government Research Reports
Author: Applied Mechanics Reviews
Author: Masters Theses in the Pure and Applied Sciences
Author: Wade H. ShaferPublisher: Springer Science & Business Media
ISBN: 1475757824
Category : Science
Languages : en
Pages : 304
Book Description
Masters Theses in the Pure and Applied Sciences was first conceived, published, and dis seminated by the Center for lnformation and Numerica/ Data Analysis and Synthesis (C/NDAS) * at Purdue University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dissemination phases of the ac tivity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficia! to the academic and general scientific and technical community. After fi ve years of this joint undertaking we had concluded that it was in the interest of ali concerned if the printing and distribution of the volume were handled by an international publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and App/ied Sciences has been disseminated on a worldwide basis by Plenum Publishing Corporation of New York, and in the same year the coverage was broadened to include Canadian universities. Ali back issues can also be ordered from Plenum. We have reported in Volume 21 (thesis year 1976) a total of 10,586 theses titles from 25 Canadian and 219 United States universities. We are sure that this broader base for theses titles reported will greatly enhance the value of this important annual reference work.