Second, low SDC buildings can be analyzed to resist seismic forces with common analytical methods. These buildings must be designed to yield in a specific manner to seismic forces. Conversely, buildings with a high SDC have more stringent restrictions on the types of structural systems that may be used. First, buildings with a low SDC have very few restrictions on the type of structure that may be used. This affects the types of structural systems permitted, the amount of design and detailing involved, and the requirements for non-structural components. What does the Seismic Design Category mean to a building?Īs alluded to earlier, the SDC indicates the amount of attention that must go into the seismic design and construction of a building. For the purposes of SDC, there are two types of buildings: typical structures (offices, apartment buildings, etc.), and those that must be functional after a seismic event (hospitals, fire stations, etc.). The third factor in determining seismic design is the building use. Most soils in Ohio are classified as type “C” or “D”. An “F” class soil is one that is relatively soft and tends to amplify seismic forces. An “A” soil is one which is founded on very shallow, hard bedrock, which is advantageous to seismic design. This is often confusing because soil types are also determined with an “A” through “F” rating system. The second driver of SDC is the underlying soils. Others have a relatively high seismicity, including California, coastal South Carolina, and the Mississippi basin between Memphis and St. Three parameters determine the SDC: geographic location, underlying soils, and building use. How is the Seismic Design Category Determined? Buildings with an SDC of “F” require a tremendous amount of seismic care and attention. Buildings with an SDC of “A” must be designed for seismic forces, but do not require any special seismic attention. SDC is an indicator of how much attention must be paid to the seismic design and construction of a building. What is it? How is it found? And what does it mean to a building? We’ll take a little time here to answer these questions. No single measure is more central to seismic design than the “Seismic Design Category” (SDC).
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |