use 50 kips/floor

Required. Compute axial shortening of columns H.3-6 and G-6 at the roof due to gravity loads using the closed-form equation given earlier. Provide column length corrections at levels 8, 16, 24, and the roof.

Solution. The variation of axial loads and cross-sectional areas for the two columns are shown in Figs. 8.32i and 8.32j. Observe that Ab is the actual area of the column at the foundation level multiplied by a factor of 0.9.

Thus Ab for the interior column = 0.9 x 147 = 132.3 in.2 Ab for the exterior column = 0.9 x 170 = 153. in.2

The loads Pb for the exterior and interior columns at foundation level are:

Pb = 31 x 50 = 1550 kips (exterior column), and Pb = 31 x 77 = 2387 kips (interior column)

Load Pt = 50 kips for the exterior, and 77 kips for the interior column.

Column Length-Shortening Computations for Column G.6 (Interior Column)

Figure 8.32i. Example 2, interior column G-6: (1) axial load variation; (2) variation of cross-sectional areas.

Renewable Energy 101

Renewable Energy 101

Renewable energy is energy that is generated from sunlight, rain, tides, geothermal heat and wind. These sources are naturally and constantly replenished, which is why they are deemed as renewable. The usage of renewable energy sources is very important when considering the sustainability of the existing energy usage of the world. While there is currently an abundance of non-renewable energy sources, such as nuclear fuels, these energy sources are depleting. In addition to being a non-renewable supply, the non-renewable energy sources release emissions into the air, which has an adverse effect on the environment.

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