Product Description
Here, in one volume, is all the architect needs to know to participate in the entire process of designing structures. Emphasizing bestselling author Edward Allen's graphical approach, the book enables you to quickly determine the desired form of a building or other structure and easily design it without the need for complex mathematics. This unique text teaches the whole process of structural design for architects, including selection of suitable materials, finding a suitable configuration, finding forces and size members, designing appropriate connections, and proposing a feasible method of erection. Chapters are centered on the design of a whole structure, from conception through construction planning.
From the Back Cover
FINDING GOOD FORMS FOR STRUCTURES--A GRAPHICA APPROACH
In Form and Forces, bestselling authors Edward Allen and Waclaw Zalewski offer a fresh, new approach to the study of structures for students and practitioners of architecture and structural engineering. Emphasizing graphics rather than mathematics and rote learning, Form and Forces teaches statics and strength of materials in the context of a set of projects that involve students in the entire process of designing elegant, long-span structures, from concept generation to detailing and planning for construction.
Readers engage in such projects as a hanging roof for a transportation terminal, a concrete shell roof for a basketball arena, a wood truss roof for a summer camp activities building, cantilevered concrete shells to cover a stadium grandstand, and other fascinating, real-world designs. As they pursue these projects, students learn each fundamental structural design technique as it is needed, in the context in which it is useful, making it easy to remember and employ the principles discussed, including:
Statics
Bending and buckling behavior
Finding form and forces for long-span structures
Beam and column formulas
The choice and layout of framing systems
Supplemented by a companion Web site with step-by-step graphic statics tutorials, interactive learning tools, and a special-purpose graphic statics solver program, Form and Forces allows every architect and engineer to employ the almost magical power of graphical techniques for generating good form.
Form and Forces equips the reader with simple, powerful tools employed by the great structural designers of the past 150 years—from Eiffel, Gaudí, and Maillart, to Schlaich and Calatrava—so that even beginners can design entire structures that are elegant and exciting.
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Posted by: peixoto - 09-09-2011, 07:52 AM - Forum: EN
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ENV 206 Full (Portuguese Version)
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THE EXTENSION OF THE N2 METHOD TO ASYMMETRIC BUILDINGS
Author: Peter FAJFAR, Damjan MARUŠIĆ, Iztok PERUŠ | Size: 352 KB | Format:PDF | Publisher: Proceedings of the 4-th European Workshop on the Seismic Behaviour of Irregular and Complex Structures | Year: 2005 | pages: 16
ABSTRACT
The paper deals with the extension of the N2 method to asymmetric building structures, represented by a 3D structural model. The results of recent parametric studies suggest that in the majority of cases an upper limit for torsional effects can be estimated by a linear dynamic (spectral) analysis. Based on this observation, it is proposed that the results obtained by pushover analysis of a 3D structural model be combined with the results of a linear dynamic (spectral) analysis. The former results control the target displacements and the distribution of deformations along the height of the building, whereas the latter results define the torsional amplifications. In the paper, first the theoretical background of the transformation of a 3D MDOF model to an equivalent SDOF model is given. Then, the proposed extended N2 method is summarized and applied to a test example of an asymmetric three- storey reinforced concrete frame (“SPEAR”) building. The results are compared with results of nonlinear dynamic time-history analyses.
Proceedings of the
4-th European Workshop on the Seismic Behaviour of Irregular and Complex Structures
26-27 August 2005 Thessaloniki, Greece
Paper No. 41
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Pushover procedure for seismic analysis of buiIdings
Author: W K Tso and AS Moghadam | Size: 708 KB | Format:PDF | Publisher: Progress in Structural Engineering and Materials | Year: 1998 | pages: 8
Summary
This article is a state-of-the-art review of the simplified inelastic analytical procedure commonly referred to as the ‘pushover analysis’ to estimate the seismic response of buildings. The basic steps of a pushover analysis are outlined. The choices available to users in each step are discussed and past studies involving the pushover procedure are briefly reviewed. Finally, the accuracy of the method compared to inelastic dynamic analysis is presented using examples.
Progress in Structural Engineering and Materials I998 Vol I(3): 337-344
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A modal pushover analysis procedure to estimate seismic demands for unsymmetric-plan buildings
Author: Anil K. Chopra and Rakesh K. Goel | Size: 576 KB | Format:PDF | Publisher: EARTHQUAKE ENGINEERING AND STRUCTURAL DYNAMICS | Year: 2004 | pages: 25
SUMMARY
Based on structural dynamics theory, the modal pushover analysis (MPA) procedure retains the conceptual simplicity of current procedures with invariant force distribution, now common in structural engineering practice. The MPA procedure for estimating seismic demands is extended to unsymmetric-plan buildings. In the MPA procedure, the seismic demand due to individual terms in the modal expansion of the effective earthquake forces is determined by non-linear static analysis using the inertia force distribution for each mode, which for unsymmetric buildings includes two lateral forces and torque at each floor level. These ‘modal’ demands due to the first few terms of the modal expansion are then combined by the CQC rule to obtain an estimate of the total seismic demand for inelastic systems. When applied to elastic systems, the MPA procedure is equivalent to standard response spectrum analysis (RSA). The MPA estimates of seismic demand for torsionally-stiff and torsionally-flexible unsymmetric systems are shown to be similarly accurate as they are for the symmetric building; however, the results deteriorate for a torsionally-similarly-stiff unsymmetric-plan system and the ground motion considered because (a) elastic modes are strongly coupled, and (b) roof displacement is underestimated by the CQC modal combination rule (which would also limit accuracy of RSA for linearly elastic systems).
KEY WORDS: modal pushover analysis; unsymmetric-plan building; seismic demands
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Adapting earthquake actions in Eurocode 8 for performance-based seismic design
Author: Julian J. Bommer and Rui Pinho | Size: 124 KB | Format:PDF | Publisher: EARTHQUAKE ENGINEERING AND STRUCTURAL DYNAMICS | Year: 2005 | pages: 17
SUMMARY
Performance-based seismic design (PBSD) can be considered as the coupling of expected levels of ground motion with desired levels of structural performance, with the objective of achieving greater control over earthquake-induced losses. Eurocode 8 (EC8) already envisages two design levels of motion, for no collapse and damage limitation performance targets, anchored to recommended return periods of 475 and 95 years, respectively. For PBSD the earthquake actions need to be presented in ways that are appropriate to the estimation of inelastic displacements, since these provide an effective control on damage at different limit states. The adequacy of current earthquake actions in EC8 are reviewed from this perspective and areas requiring additional development are identifed. The implications of these representations of the seismic loads, in terms of mapping and zonation, are discussed. The current practice of deffining the loading levels on the basis of the pre-selected return periods is challenged, and ideas are discussed for calibrating the loading-performance levels for design on the basis of quantitative earthquake loss estimation. Copyright ? 2005 John Wiley & Sons, Ltd.
KEY WORDS: performance-based seismic design; earthquake actions; return periods; design levels; loss modelling; Eurocode 8
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Practical Design of Steel Structures presents practical design examples and calculations for a multi-bay, steel-framed industrial building under the actions of a variety of loads, including travelling crane loads, dead and imposed loads, and wind forces. For the first time, engineers and students alike can appreciate the complete design process through the analysis of the whole structure and the design of structural members. The calculations are clearly presented, employing a step-by-step approach stating the design philosophy, design considerations and clarifying the referred clauses of the code of practice.
However, before analysing the structure and the design of its structural elements, it is necessary to understand the theoretical background and how the structure behaves under the actions of various loads, based upon practical design and field experience. The author considers the structural arrangement with respect to selection and availability of construction material, the cost within the scheduled construction program and the overall budget. In addition he examines the buildability of the structure with regard to space restriction, method of construction and the geotechnical conditions of the site.
The essence of this book is the simplicity and clarity of approach in the complete analysis of the whole structure and the structural design of every member. Augmented by design sketches, this book will prove valuable to practising engineers in design offices and students on structures courses.
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New York City is a lot of things, but most of all it's a city of skyscrapers. From the cake-icing Gothic detailing of the Woolworth Building to the shimmering Art Deco of the Chrysler Building, tall buildings make Manhattan the ideal image of a city. Manhattan Skyscrapers was the first book to document the highs and highers of the Big Apple's search for the sky. With its authoritative text by New York Times contributor Eric Nash, newly commissioned photos by Norman McGrath, and archival images of the city, the book became the reference work on the skyline.
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Programs (Spreadsheet) for the design of elastomer bearings.
There are two programs: one for the design of laminated bearings and other for the design of plain pad bearing. In English version, program's units are: stresses in MPa; forces in kN and dimensions in mm. Programs consider horizontal loads and rotations in longitudinal direction of structure.
DESIGN HYPOTHESIS USED IN PROGRAMS:
Laminated elastomer bearings design programs consider Euro norm standard instructions. How the results of bearing deflections may present significant variations, rotation stability is verified additionally by UIC-Code instructions and also adopted by Brazilian Standard NBR 9062 - 1985. The design of plain pad bearings consider results of Brazilian experience, complemented by EN 1337. UIC-Code an CNR (Italian Standard).
Program consider resolution of only one load condition.
Program supposes only positive vertical dead loads, positive resultant vertical loads and positive horizontal loads and displacements.
Rotations are supposed exactly with signals as given by the engineering design results.
In case of sum of rotations with opposite signals with result near zero, it is recommended consider a variation about 1,1 in major modulus rotation and 0,9 in minor modulus rotation.
The tolerance for surface leveling is 0,003 rad for pre-fabricated (steel or concrete) structures and 0,010 for cast in place structures. When bearing installation error prevision is greater than allowable tolerance, we have to add residual permanent rotation. For example, if bearing installation precision prevision under a precasted bearing is 0,010 rad, we have to consider a residual permanent rotation, in the most unfavorable sense of 0,010 rad - 0,003 rad = 0,007 rad.
No install - Direct use
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