Form and Forces

Produktbeschreibung

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:

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Statics

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Bending and buckling behavior

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Finding form and forces for long-span structures

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Beam and column formulas

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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.

Companion Web site: (...) 

Inhaltsverzeichnis

Project Team and Contributors.

Acknowledgments.

Introduction.

1 Designing a Series of Suspension Footbridges.

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

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

The force polygon and funicular polygon for funicular structures; Bow's notation.

Detailing steel rod elements in tension and anchoring to rock.

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 and unbalanced loadings.

Detailing and constructing a thin single-curvature shell.

4 Master Lesson: Designing a Trussed Roof.

Structural idea generation in three dimensions; The creative process.

Graphical truss analysis; Influence of truss form and depth on member forces.

Creative latitude in structural design and positive interactions between 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 very difficult 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 upon forces and connections.

Detailing and construction of a building with heavy timber trusses.

7 Designing a Fanlike Roof.

Extending graphical truss analysis to design fanlike structures both 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. Ochsendorf and Philippe Block).

Understanding, designing, and detailing traditional unreinforced masonry.

Stability of masonry vaults with ties, engaged and flying buttresses.

Load tracing and kerns.

Graphical analysis of arches of predetermined shape.

Design and formal vocabulary of funicular masonry arches and vaults.

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

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

Architectural and engineering interactions in designing forms and construction processes.

Working in SI (metric) units.

10 Designing Efficient Trusses.

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

Rapid assessment of truss efficiency by comparing force polygons.

Typical forms of constant-force trusses.

11 Designing Restraints for Funicular Structures.

Tensile and compressive strategies of restraint to resist change of shape.

Effects of unbalanced loads on structures.

12 Designing Shell and Membrane 

Autoreninfo

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

WAC¿AW ZALEWSKI is Professor Emeritus of Structural Design at the Massachusetts Institute of Technology.