Seismic Strengthening for Structures in Regions of Low Seismicity

Committee on Seismic Effects, Structural Division, ASCE

Document Type: Proceeding Paper

Part of: Structural Engineering in Natural Hazards Mitigation


Most existing structures were not designed to today's seismic codes and standards, and in fact in low seismicity regions codes did not require seismic design until recently. Further, older structures were usually constructed with different configurations and structural systems than commonly used for modern seismic resistant structures. The less seismically active regions still employ structural systems and construction methods that are no longer used in the more active regions, and it is difficult to translate the rules and general understanding of seismic performance to these systems. These observations are particularly true in the Eastern and Midwestern regions of the United States, where seismic design criteria have only recently been established.

Subject Headings: Seismic tests | Seismic design | Structural systems | Seismic effects | Earthquake resistant structures | Standards and codes | Structural strength | United States

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