ABSTRACT
Scott W. McConnell, P.E.* 10.1 Overview ............................................................................10-2
10.2 Building Loads...................................................................10-3 Introduction • Gravity Live Loads • Lateral Live Loads
10.4 Foundations .....................................................................10-10 Shallow Foundations • Deep Foundations
10.6 Concrete Slab and Plate Systems....................................10-17 One-Way Beam-Slab Systems • Flat Plates and Flat Slabs
10.7 Liquid-Containing Structures ........................................10-23 Introduction • Circular Tanks • Rectangular Tanks
10.8 Mass Concrete .................................................................10-26 Introduction • Materials for Mass Concrete • Concrete Mixture Design • Quality Control
10.9 On-Site Precasting and Tilt-Up Construction ..............10-28 10.10 Lift-Slab Construction ....................................................10-30
10.11 Slip-Form Construction .................................................10-33 Introduction • Materials and Methods • Advantages and Disadvantages • Economy
10.12 Prestressed Concrete .......................................................10-37 Introduction • Pretensioned (Precast) Concrete • Post-Tensioned Concrete
Acknowledgments......................................................................10-40 References ...................................................................................10-40
Concrete structural systems must be durable, constructable, economical, and functional. The system selected must be strong and in many cases aesthetically pleasing. The system must have deflections that are within acceptable limits and, in seismic areas, must have the ability to absorb the large amounts of energy generated by seismic events. Selection of a structural system can sometimes be a difficult process. In many cases, structural steel is the more economical system to use. In general, when the system is to be hidden by architectural finishes, concrete systems are not the systems of choice. When the structure itself becomes an architectural expression, concrete is often the material of choice. In most cases, the formwork for the concrete system selected represents almost half of the total expense of the structure. Obviously, repetitive systems that reduce the cost of formwork relative to the cost of the concrete and reinforcing are candidates for concrete systems. In fact, under certain conditions concrete systems may be the structural systems of choice, even when the concrete is not exposed or architectural. The plastic nature of the material provides an effective structural solution to any unusual requirements. In such cases, structural steel systems cannot provide the freedom of design that concrete provides.
