Chapter 3 Flashcards
Reactions R
The Forces within a structural support system that resist applied loads
Tension Stress
Pulls the material apart referred to as tensile stress
Compression stress
Squeezes the material referred to as compressive stress
Shear stress
Slides one plane of a material pas an adjacent plane
Axial load
load applied to the center of the cross section of a member and perpendicular to that cross section. It can be either tensile or compressive and creates uniform stresses across the cross section of the material
Eccentric Load
Load perpendicular to the cross section of the structural member but which dose not pass through the center of the cross section. may be both tensile and compressive
Torsional Load
Load applied off center from the cross section of the structural component and at a angel to or in the same plane as the cross section, produces a twisting effect that creates shear stresses in a material
Dynamic load also know as Shock loading
Involve motion and are capable of delivering energy greatly in excess of the weight of the object involved.
Contentrated loads produce
Highly localized forces and non uniform loads in the supporting structural members
Water a depth of 3 inches adds
Static load of 21 pounds per square foot
Negative Pressure wind load
Wind may produce a suction effect on the downwind side of the building resulting in outward pressure
Complex Factors to wind loads
Building Height
Surrounding terrain
Adjacent urban development
3 Buildings that require stronger bracing that the seismic activity map indicates
Office Buildings
Public assembly buildings
Schools
5 Buildings that must be designed for greater seismic loads because they are essential for community recovery after an earthquake are
Fire and Police stations
Hospitals
Communication Centers
Emergency preparedness centers
Generating stations
Three types of accommodations for seismic forces are
Expansion joints
Damping mechanisms
Base isolation
