Ray Delaforce
PV Elite Senior Support Engineer

Seismic Design, Part 1: Basics

What is the basis of seismic or earthquake design? The principles were laid in the mid-17th century by the English natural philosopher, Sir Isaac Newton. He furthered the work of the great Galileo Galilei whose work on gravitation and force advanced the early renaissance science.

So, what was the basis for seismic design? Simply put, it was the discovery that a force was required to accelerate or change the velocity of an object. In fact, the relationship between force and acceleration is expressed in a very simple equation:

Force = mass x acceleration

But, what has acceleration got to do with earthquakes? This: When an earthquake occurs, the ground experiences an acceleration. Anything that sits on the ground also experiences that acceleration.

Let us consider the case of a tall vessel mounted on a foundation that undergoes this acceleration. As it experiences lateral (horizontal) acceleration, other forces come into play, such as inertia. Inertia is the resistance of any object to experience a change of velocity.

Read the complete article.
Vol.3 | November 2016 | Issue 11
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Here's a great way to save time. Details such as platforms and nozzles can be copied from one model to the next using the List Dialog found in the Auxiliary toolbar in the Home Ribbon menu.
In a pinch, you can run the Units Conversion Utility to simply type the number to be converted and check the different conversion unit values.

You can select this option in the Tools Ribbon menu.

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