Civil MDC

Design of Concrete Structures by David Darwin (Author), Charles Dolan (Author) 2

Design of Concrete Structures by David Darwin (Author), Charles Dolan (Author)


The sixteenth edition of Design of Concrete Structures continues the dual objectives
of establishing a firm understanding of the behavior of structural concrete and of
developing proficiency in the methods of design practice. It is generally recognized
that mere training in special design skills and codified procedures is inadequate for
a successful career in professional practice. As new research becomes available and
new design methods are introduced, these procedures are subject to frequent changes.
To understand and keep abreast of these rapid developments and to engage safely in
innovative design, the engineer needs a thorough grounding in the fundamental performance
of concrete and steel as structural materials and in the behavior of reinforced
concrete members and structures.

At the same time, the main business of the structural
engineer is to design structures safely, economically, and efficiently. Consequently,
with this basic understanding as a firm foundation, familiarity with current design
procedures is essential. This edition, like the preceding ones, addresses both needs.
The text presents the basic mechanics of structural concrete and methods for
the design of individual members subjected to bending, shear, torsion, and axial
forces. It additionally addresses in detail applications of the various types of structural
members and systems, including an extensive presentation of slabs, beams,
columns, walls, footings, retaining walls, and the integration of building systems.

The 2019 ACI Building Code, which governs design practice in most of the
United States and serves as a model code in many other countries, underwent a
number of significant changes, many due to increases in the specified strengths of
reinforcing steels that can used for building construction.

Changes of note include the addition of Grade 100 steel for use as principal
reinforcement for gravity and lateral loads and the recognition that changes were
needed in the Code, even for Grade 80 reinforcement. The use of steels with grades
above 60, long the standard in U.S. practice, has led to changes in the approaches to
both strength and serviceability, including the limits on both maximum and minimum
reinforcement; development lengths of straight, hooked, and headed reinforcement;
and requirements for the effective moment of inertia when calculating deflections.
Shear design has changed through the addition of a size effect term that recognizes
that shear stress at failure decreases as member depth increases. Inclusion of the size
effect affects foundation walls, as well as beams and slabs—a point that is highlighted
in this edition. The techniques used for two-way slab design were deleted from the
2019 ACI Building Code with the understanding that those techniques would be
covered by textbooks. That information has been retained in Chapters 13, 22,

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