PE Civil Exam: YouTube Structure review videos "Dr. Structure"
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PE Civil Exam: YouTube Structure review video:
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Structures buckling under tensile dead load - paper.
Author(s): D. ZACCARIA, D. BIGONI, G. NOSELLI & D. MISSERONI.
Published By:The Royal Society.
Published Year:12 January 2011
DOI:10.1098
Size: 0,45 MB
Quality:Original preprint
Abstract: Some 250 years after the systematic experiments by Musschenbroek and their rationalization by Euler, for the first time we show that it is possible to design structures (i.e. mechanical systems whose elements are governed by the equation of the elastica) exhibiting bifurcation and instability (‘buckling’) under tensile load of constant direction and point of application (‘dead’). We show both theoretically and experimentally that the behaviour is possible in elementary structures with a single degree of freedom
and in more complex mechanical systems, as related to the presence of a structural junction, called ‘slider’, allowing only relative transversal displacement between the connected elements. In continuous systems where the slider connects two elastic thin rods, bifurcation occurs both in tension and in compression, and is governed by the equation of the elastica, employed here for tensile loading, so that the deformed rods take the form of the capillary curve in a liquid, which is in fact governed by the equation of the elastica under tension. Since axial load in structural elements deeply influences dynamics, our results may provide application to innovative actuators for mechanical wave control; moreover, they open a new perspective in the understanding of failure within structural elements.
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Structures buckling under tensile dead load - Video.
Author(s): D. Zaccaria, D. Bigoni, G. Noselli and D. Misseroni. | Size: 17,6 MB Format:AVI | Quality:360p | Publisher: The Royal Society | Year: 2011
Buckling of a straight elastic column subject to compressive end thrust occurs at a critical load for which the straight configuration of the column becomes unstable and simultaneously ceases to be the unique solution of the elastic problem (so that instability and bifurcation are concomitant phenomena). Buckling is known from ancient times: it has been experimentally investigated in a systematic way by Pieter van Musschenbrok (1692–1761) and mathematically solved by Leonhard Euler (1707–1783), who derived the differential equation governing the behaviour of a thin elastic rod suffering a large bending, the so-called ‘elastica’ (see Love 1927).
This video shows bifurcation and instability experiments of elastic structures subject to tensile dead load. This research was published in the journal Proceedings of the Royal Society, in the paper: Structures buckling under tensile dead load by D. Zaccaria, D. Bigoni, G. Noselli and D. Misseroni.
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Hi mates, may I request you to help me to get this paper.
Optimizing precipitation station location: a case study of the Jinsha River Basin
DOI: 10.1080/13658816.2015.1119280
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Author(s)/Editor(s): Editor(s): Michael Beer, Ioannis A Kougioumtzoglou, Edoardo Patelli, Ivan Siu-Kui Au | Size: 181 MB | Format:PDF | Quality:Unspecified | Publisher: Springer | Year: 2015 | pages: 4643 | ISBN: 978-3642353451
The Encyclopedia of Earthquake Engineering is designed to be the authoritative and comprehensive reference covering all major aspects of the science of earthquake engineering, specifically focusing on the interaction between earthquakes and infrastructure. The encyclopedia comprises 271 contributions. Since earthquake engineering deals with the interaction between earthquake disturbances and the built infrastructure, the emphasis is on basic design processes important to both non-specialists and engineers so that readers become suitably well-informed without needing to deal with the details of specialist understanding. The content of this encyclopedia provides technically inclined and informed readers about the ways in which earthquakes can affect our infrastructure and how engineers would go about designing against, mitigating and remediating these effects. The coverage ranges from buildings, foundations, underground construction, lifelines and bridges, roads, embankments and slopes. The encyclopedia also aims to provide cross-disciplinary and cross-domain information to domain-experts. This is the first single reference encyclopedia of this breadth and scope that brings together the science, engineering and technological aspects of earthquakes and structures.
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This is a zip file containing the individual 271 pdf files
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Engineers face numerous uncertainties in the design and development of products and processes. To deal with the uncertainties inherent in measured information, they make use of a variety of statistical techniques. This outstanding text presents single-variable statistical distributions that are useful in engineering design and analysis. It lists significant properties of these distributions and describes methods for estimating parameters and their standard errors, constructing confidence intervals, testing hypotheses, and plotting data. Each distribution is worked through typical applications. Figures are used extensively to clarify concepts. Methods are illustrated by numerous fully worked examples in the form of Mathcad documents that readers can use as templates for their own data, eliminating the need for programming. Intended as both a text and reference, the book assumes an elementary knowledge of calculus and probability. Graduate and advanced undergraduate students, as well as practicing engineers and scientists, will be able to use this book to solve practical problems connected with the uncertainty assessment in a wide range of engineering contexts.
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Hello all, not sure if I'm posting in the right section but I'm wondering if CivilEA provides drafting services. I'm an HVAC contractor in the USA and would like to outsource the sheet metal duct and pipe drafting for a 75 story residential building. Please PM me for more details.
Structural design details of the Petronas twin towers
Author(s): CHARLES H. THORNTON, UDOM HUNGSPRUKE and LEONARD M. JOSEPH.
Published By:THE STRUCTURAL DESIGN OF TALL BUILDINGS, Vol. 6, 245-262
Published Year:1997
Size: 0,7 MB
Quality:Original preprint
Abstract: Twin 451.9m (1482 ft) tall towers just completed in Kuala Lumpur, Malaysia, presented a variety of design challenges related to tall buildings and slender members under wind load, and to construction methods in the Far East. Cast in place high strength concrete for the core, perimeter columns and ring beams provides economical vertical load carrying ability, stiff lateral load resistance and inherent damping for occupant comfort. Steel beams on metal deck slabs provide effcient, economical and quickly erected long span floors which are easily adaptable to future changes in openings and loadings. The unusual tower plan has alternating cantilevered points and arcs, only 16 main tower columns, haunched wind frame ring beams 8.2 to 9.8m (27 to 32 ft) long.
Vierendeel outriggers at mid-height and sloped columns at setbacks. A unique arch supported skybridge spans 58.4 (190 ft) between towers at levels 41 and 42, where the towers move more than 300mm (1 ft) in any direction. A stainless steel pinnacle tops each tower. Extensive analytical, force balance and aeroelastic wind studies addressed individual tower behavior, influences between towers, pinnacle behavior, skybridge overall behavior and arch leg behavior. No supplementary damping was needed for the towers. Pinnacles have simple chain impact dampers. Each of the four arch legs has three tuned mass dampers for the three main modes of vortex excitation.
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This document contains basic information pertinent to the welded strengthening and repair of existing steel structures. The information contained in this guide is intended for both Engineers and Contractors with the purpose of providing direction and guidance to perform weld repairs, weld strengthening, and other weld procedures to correct problematic issues with existing structures. This guide contains background information that will be useful to the Engineer who is obligated under AWS D1.1/D1.1M:2008 Clause 8 to provide a comprehensive plan to address projects that involve strengthening and repairing of steel structures. The approach to the strengthening and repairing of these materials is to be developed using the information provided herein.
This guide is intended to apply to the strengthening and repair of existing structures made of the following materials:
(1) Steel with a minimum specified yield strength of 100 ksi [690 MPa] or less
(2) Cast iron
(3) Wrought iron
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