By Alford Johnson
Designing with Structural metal ДИЗАЙН, ДОМ и СЕМЬЯ, ПРОФЕССИИ И РЕМЕСЛА Название:Designing with Structural metal A advisor for Architects Издательство: American Institute of metal development Дата публикации: 2d version, 2002ISBN (eng): 1564240525 Язык: English Формат: PDF Размер: 2.5 MB Количество страниц: 374The function of this consultant is to supply architects with the instruments had to suppose more well-off and assured operating with structural metal in construction initiatives. With a better realizing of the features and inherent merits of structural metal, architects might be ready to higher make the most of metal as a framing fabric. a number of the strengths structural metal deals in construction layout is excessive resiliency and function less than harsh and tough stipulations, i.e., earthquakes and hurricanes. metal deals the power to span nice distances with slenderness and charm. metal may be formed to accomplish curved types and is going up speedy to fulfill tricky development schedules in nearly any climate situation. metal will be simply changed sooner or later to fulfill altering standards. And with almost all structural metal produced within the usa at the present time made of recycled vehicles and different metal items, metal bargains environmental sustainability for the future.Скачать.comuploading.com0
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Extra info for Designing with Structural : A Guide for Architects (AISC)
The first known stiffness criterion appeared nearly 170 years ago. " The traditional stiffness criterion for steel floors limits the live load deflection of beams or girders supporting plastered ceilings to span/360. This limitation, along with restricting span-to-depth ratios of members to 24 or less, have been widely applied to steel-framed floor systems in an attempt to control vibrations, but with limited success. Traditionally, soldiers "break step" when marching across bridges to avoid large, potentially dangerous, resonant vibrations.
This alternate type of expansion joint is generally used when double columns cannot be accommodated, or where double columns in an exposed position of the building would be undesirable. Regardless of what type expansion/contraction system is used, it cannot be overemphasized that freedom of movement must be incorporated throughout all of the building systems. Again provisions must be made for all components that cross the expansion joint. ft 200200feet EXPANSION EXPANSI ON CONTRACTION CONT RACTION ft 200200feet EXPANSION EXPANSI ON CONTRACTION CONTRACTION 200 ft 200 feet EXPANSION EXPANSI ON CONTRACTION CONTRACTION MOVEMENT MOVEMENT JOINTS JOINTS Figure 15.
For instance, the tolerance level for people participating in aerobics (rhythmic activities) is ten times greater than if they are in a quiet office. To use the scale, the natural floor frequency and the estimated acceleration for an activity must be calculated. The acceleration of a floor system depends on the activity, the natural frequency for the floor, the amount of mass that moves when the floor vibrates, and the damping in the floor. Floor acceleration increases as energy in the activity increases; thus, floor acceleration is greater for aerobics than for walking.
Designing with Structural : A Guide for Architects (AISC) by Alford Johnson