Form and Forces Designing Efficient, Expressive Structures
by Allen, Edward; Zalewski, WaclawEdition: 1st
Format: Hardcover
Pub. Date: 2009-09-28
Publisher(s): Wiley
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Summary
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.
Author Biography
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.
WACŁAW ZALEWSKI is Professor Emeritus of Structural Design at the Massachusetts Institute of Technology.
Table of Contents
| Project Team and Contributors | |
| Acknowledgements | |
| Introduction | |
| 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 | |
| Designing a Suspended Roof | |
| Families of funicular forms; Relationship of funicular polygon to finding form and forces | |
| Pole-finding strategies; Learning from the force polygon to find optimum forms | |
| Sag ratio; Length of a hanging cable | |
| Detailing and construction using steel cables, sockets, framing, and masts | |
| 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 | |
| Master Lesson: Designing Simple Trusses | |
| 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 | |
| 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 | |
| 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 | |
| Designing a Fanlike Roof | |
| Extending graphical truss analysis to design fanlike structures that | |
| are compressive or tensile (cable-stayed | |
| Finding good forms and member forces in cable-stayed, fanlike, and treelike structures | |
| Design and detail issues using steel tube construction | |
| Designing Unreinforced Masonry | |
| Contributing Authors: John A. Ochsendorf and Philippe Block | |
| Understanding, designing, and detailing traditional unreinforced masonry | |
| Stability of masonry with, vaults, 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 | |
| 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 | |
| Detailing practices in reinforced concrete foundations and | |
| exposed architectural reinforced concrete | |
| Working in SI | |
| 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 | |
| Finding form and forces for constant-force structures including arches | |
| Designing Restraints for Funicular Structures | |
| Tensile and compressive strategies of restraint to resist shape alterations | |
| Effects of unbalanced loads on structures | |
| Designing Shell and Membrane Structures | |
| Contributing Author: Michael H. Ramage | |
| Form-finding techniques applied to shell, tent, pneumatic, and membrane structures | |
| Material constraints and opportunities | |
| Detailing lightweight structures | |
| Structural Materials | |
| Behavior of structural materials at microscopic level; Comparisons to macroscopic analogies | |
| Responses of materials to stress and loading; Understanding structural deformation and failure | |
| Properties of materials: cohesion, internal friction, brittleness and ductility | |
| 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 to any structural element | |
| Use of graphical truss solutions to find forces in truss models | |
| Designing a Bay of Framing | |
| Configuring building frames in three dimensions; laying out a framing 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 where lateral loads predominate | |
| Integration with vertical transportation, life safety and egress planning, mechanical systems | |
| Bending Action on Beams | |
| Analysis of external load patterns on structures; Quantifying and simplifying external loadings | |
| V and M diagrams; Relationship to force polygons and funicular polygons | |
| Graphical and semigraphical constructions | |
| Bending Resistance in Rectangular Beams | |
| Resistance mechanisms of beams | |
| Lattice pattern of flow of forces | |
| Deflection calculations | |
| Development of mathematical expressions for bending stresses and web stresses in rectangular beams | |
| Designing bays of wood framing | |
| Bending Resistance in Beams of Any Shape | |
| Properties of complex cross-sectional shapes | |
| Moment of Inertia | |
| Composite action | |
| Designing bays of steel framing | |
| Designing Columns and Loadbearing Walls | |
| Types of columns: short, intermediate, long; Buckling and deflection | |
| Designing column restraints; Designing optimum forms for columns | |
| Loadbearing walls | |
| Portal frames, hinges | |
| Architectural and historical expressions of columns | |
| Designing a Sitecast Concrete Building | |
| Composite action of steel and concrete in concrete beams, slabs, and columns | |
| Selection and design criteria for reinforced concrete framing | |
| Opportunities and constraints for slab openings | |
| Relationship of structural typology to program | |
| Designing bays of reinforced concrete framing | |
| Master Lesson: Designing in Precast Concrete | |
| Multi-disciplinary 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 | |
| Designing an Entrance Canopy | |
| Longitudinal shaping of beams to create parallel force flow | |
| Structural articulation at cantilevers and termination details | |
| Afterword: What is Quality? | |
| Index | |
| Table of Contents provided by Publisher. All Rights Reserved. |
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