Seismic Design

Seismic design is the analysis and engineering of structures to make them more resistant to earthquakes. When tectonic plates in the earth collide or move, one plate usually slides under another and shock waves are sent through the ground. The movement of the plates is called rock motion, and the movement of the soil is called ground motion. Seismic design calculates the effect that these motions will have on buildings based on the rock motion and the type of soil present.

New structures in the design and planning phase as well as older buildings that are being retrofitted need careful seismic design to reduce earthquake damage. This is done with data from past earthquakes, the proximity of the building site to geologic faults, and study of the ground in the area. It is also necessary to take into account the magnitude of past earthquakes in the area to plan for the largest shock that could occur in the future.

The Benefits of Seismic Design
Seismic design generally makes buildings strong by making them flexible. A rigid structure, no matter how strong, is more vulnerable in an earthquake than one that moves with the shock. Also, making a structure completely earthquake-proof could be prohibitively expensive. Seismic design engineers usually plan for part of the building to be damaged, but intend for the structure itself to retain its integrity and remain standing. This protects the people inside and allows them to evacuate safely, even if the building's exterior needs repair.

Planning ahead with thorough seismic design and engineering can save lives and make the aftermath of an earthquake much less devastating, both in terms of human life lost and expense needed to rebuild or repair. An engineering and architecture firm can analyze existing buildings as well as design new structures with comprehensive seismic planning. Contact The KPA group at www.thekpagroup.com for more information.