Download or read book Static and Dynamic Behavior of Antisymmetrically Loaded Arches written by R. H. Chiu and published by . This book was released on 1966 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: Four pinned-base steel arches with a 96-inch radius, 143.8-inch span, and uniform cross section were cold-rolled from 4M13 sections and tested under various static and dynamic loads uniformly distributed over one-half the arc length. A maximum static load of 72,000 pounds was applied by the NCEL blast simulator using compressed air. A dynamic peak load of 64,000 pounds was attained by detonating Primacord in the blast simulator. The blast loading had a rise time of about 3 milliseconds and a decay time of about 1.6 seconds. An equivalent triangular load-time function was used for the dynamic analysis. The applied loads and the resulting deflections, strains, and reactions were measured. The reduced data are presented in graphical and tabular form. The theoretical analyses for statically and dynamically loaded arches were based on the discrete framework which represented the continuous arches tested. A 16-bar system was used for both static and dynamic response calculations, and a 40-bar system was used for natural mode and frequency calculations. In the static analysis, the effects of stress amplification, misalignment, and elastic supports on the response of the arch were considered. Due to the strain- hardening characteristics of the arch material, the idealized stress-strain curve was represented by a trilinear curve rather than by the usual bilinear stress-strain curve. A simplified dynamic analysis gave results reasonably close to those from more rigorous methods; the values were on the conservative side. Nearly complete correlation between the theoretical and experimental results was obtained.
Download or read book STATIC AND DYNAMIC BEHAVIOR OF REINFORCED CONCRETE CIRCULAR ARCHES PART 1 written by and published by . This book was released on 1963 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: The experimental and analytical studies indicate that the approximate conventional theory based on limit analysis is quite adequate to predict the static ultimate loads of the underreinforced arches. The dynamic ultimate loads for compression mode loading can also be predicated by approximate theory provided that an appropriate dynamic increase factor (based on the increase in material properties) is used. However, it is not clear whether a satisfactory approximate theory can be developed to predict the ultimate dynamic load carrying capacity of the arch, subjected to a concentrated dynamic load at the crown or anti symmetric concentrated dynamic loads at quarter points. The experimental and analytical investigations also indicate that the natural periods of the arches have a significant influence on the dynamic load-carrying capacity of the arches in the cases of a concentrated load at the crown and antisymmetric concentrated loads at quarter points. The mode of failure under both static and dynamic loads is quite ductile in these cases as compared to the compression mode loading.
Download or read book Technical Abstract Bulletin written by and published by . This book was released on with total page 776 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Calculation of static and dynamic response of circular arches written by Richard T. Eppink and published by . This book was released on 1964 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report presents theoretical calculations of the behavior of two-hinged circular arches deflecting in their own plane and subjected to static and dynamic loads distributed uniformly over a portion of the arches. The solutions are obtained by reducing the structural description of the continuous arch to an approximate system having a finite number of degrees of freedom. The numerical results predict the behavior in and beyond the elastic range of the circular arches. The parameters describing the geometry, stiffness, and other physical characteristics of the arch were selected to represent the actual arches tested in the blast simulator at the U.S. Naval Civil Engineering Laboratory. The arches tested were fabricated from 4MI3.0 section with two strips welded to the top flanges. The radii of arches were 96.0 inches to the center lines of thin cross-sections and the central angles were about 97 degrees.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1992 with total page 1572 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Behavior of Shallow Arches Subjected to Static and Dynamic Loads written by Johnson Liao and published by . This book was released on 1973 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Alternatives in Energy Conservation written by and published by . This book was released on 1976 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Navy Civil Engineer written by and published by . This book was released on 1965 with total page 944 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Guide to Technical Documents written by Naval Civil Engineering Laboratory (Port Hueneme, Calif.) and published by . This book was released on 1974 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Static and Dynamic Behavior of Reinforced Concrete Circular Arches written by Vijay N. Gupchup and published by . This book was released on 1963 with total page 237 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government wide Index to Federal Research Development Reports written by and published by . This book was released on 1966-12 with total page 1288 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Shock and Vibration Bulletin written by and published by . This book was released on 1976 with total page 1478 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Static Loading of Small Buried Arches written by H. L. Gill and published by . This book was released on 1964 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: Static and dynamic tests have been performed to study the behavior of small buried arches. The objective was to gain information which will serve as a guide in developing design methods for underground structures. This report describes the static tests, the prime purposes of which were: (1) to obtain information on the behavior of a statically loaded soil-arch system, and (2) to provide data for comparison with that from a similar system subjected to blast loading. The test configuration consisted of two conterminous semicircular arches each 30 inches in diameter buried in dry sand with 6 inches of cover over the crown. The arches were identical except for differing footing widths. The entire system was contained by the NCEL atomic blast simulator pit, which is 9 feet by 10 feet in plan and 12 feet deep. Static loads up to 25 psi were applied to the surface of the sand as various measurements were being made. The test results show that the expected decrease in footing deflection with increase in footing width was accompanied by an increase of maximum moment in the arch. (Author).
Download or read book Static and Dynamic Behavior of Reinforced Concrete Circular Arches written by Massachusetts Institute of Technology. School of engineering. Department of civil engineering and published by . This book was released on 1963 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Annual Index written by and published by . This book was released on 1985 with total page 968 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government wide Index to Federal Research Development Reports written by and published by . This book was released on 1966 with total page 904 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book U S Government Research Reports written by and published by . This book was released on 1963 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt:
