Form and Forces: Designing Efficient, Expressive Structures [With Access Code] / Edition 1

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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.

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Product Details

  • ISBN-13: 9780470174654
  • Publisher: Wiley
  • Publication date: 9/15/2009
  • Series: CourseSmart Series
  • Edition description: New Edition
  • Edition number: 1
  • Pages: 640
  • Sales rank: 583,125
  • Product dimensions: 11.20 (w) x 8.50 (h) x 1.40 (d)

Meet the Author

EDWARD ALLEN has taught for more than thirty years at theMassachusetts Institute of Technology, Yale University, and theUniversity of Oregon. He is the bestselling author of Fundamentalsof Building Construction, Fifth Edition.

WACŁAW ZALEWSKI  is Professor Emeritus ofStructural Design at the Massachusetts Institute of Technology.

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Table of Contents

Project Team and Contributors.



1 Designing a Series of Suspension Footbridges.

Basic definitions of statics: Loads, Forces, Tension,Compression, Stress.

Free-body diagrams; Vectors and scalars; Static equilibrium ofconcurrent forces.

The force polygon and funicular polygon for funicularstructures; Bow’s notation.

Detailing steel rod elements in tension and anchoring torock.

Lateral stability; stiffening a tensile structure.

Construction detailing and planning.

2 Designing a Suspended Roof.

Designing and detailing a suspended roof.

Designing funicular curves with specified properties.

Families of funicular curves.

Static equilibrium.

Components of forces.

Steel cable fastenings and details.

Lateral bracing.

Regulating forces on masts and backstays.

3 Designing a Concrete Cylindrical Shell Roof.

Shaping funicular arches and vaults in compression.

Form-finding: catenary, parabola, circle.

Stiffening compressive structures against buckling andunbalanced loadings.

Detailing and constructing a thin single-curvature shell.

4 Master Lesson: Designing a Trussed Roof.

Structural idea generation in three dimensions; The creativeprocess.

Graphical truss analysis; Influence of truss form and depth onmember forces.

Creative latitude in structural design and positive interactionsbetween architects and engineers.

5 Designing a Building on a Vertical Site.

Moments of forces.

Equilibrium of nonconcurrent forces.

Graphical analysis of nonconcurrent forces.

Detailing and construction of a steel frame structure on a verydifficult site.

6 Designing with Multipanel Trusses.

Various methods of analysis for multipanel trusses.

Common truss configurations and their uses.

Developing and refining the form of complex trusses based uponforces and connections.

Detailing and construction of a building with heavy timbertrusses.

7 Designing a Fanlike Roof.

Extending graphical truss analysis to design fanlike structuresboth compressive and tensile (cable-stayed).

Finding good forms and member forces for cable-stayed, fanlike,and treelike structures.

Design and detailing issues using steel tube construction.

8 Designing Unreinforced Masonry (John A. Ochsendorfand Philippe Block).

Understanding, designing, and detailing traditional unreinforcedmasonry.

Stability of masonry vaults with ties, engaged and flyingbuttresses.

Load tracing and kerns.

Graphical analysis of arches of predetermined shape.

Design and formal vocabulary of funicular masonry arches andvaults.

9 Master Lesson: Designing a Concrete Shell Roof for aGrandstand.

Equilibrium in three dimensions of a composite structure;combining funicular vaults and trusses.

Architectural and engineering interactions in designing formsand construction processes.

Working in SI (metric) units.

10 Designing Efficient Trusses.

Reversing the graphical process to synthesize shapes ofconstant-force trusses and arches.

Rapid assessment of truss efficiency by comparing forcepolygons.

Typical forms of constant-force trusses.

11 Designing Restraints for Funicular Structures.

Tensile and compressive strategies of restraint to resist changeof shape.

Effects of unbalanced loads on structures.

12 Designing Shell and Membrane Structures (Michael H.Ramage).

Form-finding techniques applied to shell, tent, pneumatic, andmembrane structures.

Material constraints and opportunities.

Detailing lightweight structures.

13 Structural Materials.

Granular materials.

Solid materials.

How materials break.

Transmission of forces in solid materials.

Characteristics of a good structural material.

Common structural materials.

Concepts of stress and strain.

Factors of safety.

14 Master Lesson: Designing with the Flow of Forces.

Trajectories of principal stresses.

Strut-and-tie modeling; truss modeling.

Three patterns of force flow; applications of basic patterns toany structural element.

Use of graphical truss solutions to find forces in trussmodels.

15 Designing a Bay of Framing.

Configuring building frames in three dimensions; laying out aframing plan.

Understanding bays, decking, joists, beams, girders, slabs,columns, and framing materials.

Load tracing for gravity and lateral loads.

Bracing to resist lateral loads.

Criteria influencing design of bays in very tall buildings wherelateral loads predominate.

Integration with vertical transportation, life safety and egressplanning, mechanical systems.

16 Bending Actions on Beams.

Analysis of external load patterns on structures; quantifyingand simplifying external loadings.

Bending moments and vertical forces.

V and M diagrams; relationship to force polygonsand funicular polygons.

Graphical and semigraphical constructions.

17 How Beams Resist Bending.

Resistance mechanisms of beams.

Lattice pattern of flow of forces.

Deflection calculations.

Development of mathematical expressions for bending stresses andweb stresses in rectangular beams.

Designing bays of wood framing.

18 Bending Resistance in Beams of Any Shape.

Properties of complex cross-sectional shapes.

Moment of inertia.

Composite action.

Designing bays of steel framing.

19 Designing Columns, Frames, and Load-Bearing Walls.

Types of columns: short, intermediate, long; buckling anddeflection.

Designing column restraints; designing optimum forms forcolumns.

Load-bearing walls.

Portal frames, hinges.

Architectural and historical expressions of columns.

20 Designing a Sitecast Concrete Building.

Composite action of steel and concrete in concrete beams, slabs,and columns.

Selection and design criteria for reinforced concreteframing.

Opportunities and constraints for slab openings.

Relationship of structural system to program.

Designing bays of reinforced concrete framing.

21 Master Lesson: Designing in Precast Concrete.

Multidisciplinary project design teams.

Medium-rise building planning and choice of framing systems.

Integration with life safety and egress planning.

Integration with mechanical and electrical services.

Designing with precast concrete framing elements.

22 Designing an Entrance Canopy.

Designing a constant force beam.

Deriving a beam profile from the bending moment diagram.

Assuring overall stability of an unusual structure.

Combined axial and bending stress in a beam.

Guidelines for shaping structures.

Afterword: Engineers and Architects.


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  • Posted November 2, 2010

    A life-changing book! Get it and use it!

    This book is amazing and all structural engineers and architects, students included, should have this on their bookshelves. But more importantly than having it in your library is actually plunging into it and learning from it because if you learn these techniques they will completely transform the way you think about structural form and forces. I have been using this book in my classes, one class is taught to architecture students and the other to structural engineering students. The results have been astounding, the architecture students are empowered by the form finding tool of graphic statics and the engineers are thrilled by the beauty and logic of the force finding process. Both groups of students came up with dozens of elegant and efficient structures by linking the forces to the forms, and that is what I mean by "life changing". I find myself totally enthralled by this method and the power it unleashes. I have a PhD in structural engineering and I am a registered engineer in California and I have never been so excited about a technique as I am with this one. The book is clearly written, down to the level of having figures and text match up on the page so you don't have to flip pages to refer to a figure. Some exercises are straightforward, so much so that I taught them to 6th graders as an outreach exercise. Other sections are deeply connected to higher order theories and merit study from my graduate students. Many references are made to the giants of our profession who have used these techniques to design graceful and efficient structures. Yet the book manages to be all these things in a precise and clear manner. The authors really want you to understand each step thoroughly and they give you the tools needed to really understand important ideas about structural form.

    1 out of 1 people found this review helpful.

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  • Posted February 27, 2014

    highly recommend this book

    Great textbook for a studying architect.

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  • Anonymous

    Posted November 7, 2010

    No text was provided for this review.

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