Figure 2.54. Three-story building: comparison of modal story shears and the SRSS story.

Figure 2.54. Three-story building: comparison of modal story shears and the SRSS story.

Figure 2.55. Seven-story building example; dynamic analysis.


Spectral Accelerations. From the response spectrum of Fig. 2.56 a, b, and c, the spectral accelerations are

Observe that all three parts of Fig. 2.56 contain the same information related to the acceleration response, Sa. Only the format is different. Figure 2.56a shows the building periods and spectral accelerations in a format similar to that in 1997 UBC and IBC-03. Figure 2.56b is a tripartite response spectrum with additional values for displacements and velocities. Figure 2.56c shows the building periods and response accelerations in tabular format.

It should be noted that in the computer program used for calculation of the

Eigen values, each mode is normalized for a value of £ W f2 = 1.0. In some programs, g *

f is normalized to 1.0 at the uppermost level. Required.

1. Modal analysis to determine base shears.

2. First, second, and third mode forces and displacements.

3. Modal analysis summary.

Spectral acceleration, Sa(g)

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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