ENGR 1166 Chapter Notes - Chapter 1: Ductility, Space Frame
19 Apr 2017
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Document Summary
Static loads - stationary forces or weights that do not change in position or magnitude over time. Ex) building frames, machine loads on the floor, snow on a roof, load of a truck parked on a bridge, cars parked in a garage, storage load. Properties - direction, point of application, magnitude. Type - point of load, distributed load, moment (torque) Moment = distance (vector) x force (vector) Dynamic loads - change positions or magnitude over time, or when loading conditions change with time. Properties - direction, point of application, range of magnitude, frequency. F = frequency, number of cycles per second (unit = 1/sec or hertz) Some familiar materials - steel, aluminum, bituminous/asphalt, concrete, timber. Properties - strength, unit weight, durability, ductility, stiffness (modulus of elasticity) All these are put into consideration when deciding the best building material. Ductility = (found on stress vs strain graph)
