For such structures I=1.25. Associate Professor University of California, Los Angeles CE243A 2 1971 San Fernando, California Earthquake. ScienceDirect ® is a registered trademark of Elsevier B.V.Seismic design and importance factor: Benefit/cost for overall service time versus per unit service timeCopyright © 2015 Elsevier Ltd. All rights reserved.ScienceDirect ® is a registered trademark of Elsevier B.V.

The consideration of the benefit (or cost) at present value per lifecycle or per unit service time may lead to different optimum design levels for a given planning time horizon. The chapter also talks about the seismic design category (SDC). For the same level of ground motion and type of detailing, a stronger building will have lower ductility demand and undergo less damage than a weaker system. Moreover, it is unknown if the recommended importance factor in design codes to increase the seismic design load for classes of buildings is optimum. Answer: The importance factor I, and the system Deflection Amplification factor Cd, specified within the ETABS Wall Pier / Spandrel Design Preferences form, are used for boundary-element design. Serving all market segments: healthcare, industrial, military, commercial, see full list. Professor of Civil Engineering, Virginia Tech, Email:

The value P NCR=0.10 is recommended. The chapter concludes with a discussion of the seismic design category exception for buildings with short periods. Importance Factor Importance Factor is determined from Design Loads for Buildings and Other Structures (ASCE 7) based on the Occupancy Category.

With Over 15,000 Completed Projects, We Own the Experience!ISAT's Seismic Custom Engineering & Value Engineering Services CE 243A Behavior & design of RC Elements Prof. J. W. Wallace Fall 04 2 CE243A 3 1971 ... fault factor to base

ISAT has been involved with some of the most complex projects across the globe.Read why professionals worldwide are choosing ISAT or write your own.With over 15,000 completed projects, we own the experience! The parameters that affect SDC are the risk category and the design level spectral accelerations S DS and S D1, or for very high level ground motions, the mapped maximum considered earthquake spectral acceleration.The SDC depends on the site class because S DS and S … The categories are used to classify buildings and other structures based on occupancy level and nature of use. Assembled a detailed seismic hazard model applicable to a region in Mexico.Estimated uniform hazard spectra for several sites, including Mexico City.Investigated the effect of sigma of attenuation relation on optimum seismic design.Assessed the differences in the optimum seismic return period values for seven locations.Provided basis to select the importance factor based on damage cost information.The maximum expected monetary benefit or minimum expected cost rule are often adopted to assess the optimum structural design levels under infrequent large earthquakes. All other Components Importance Factor (Ip) will be equal to 1.0.

This seismic design criterion has evolved to the point where, under the IBC as incorporated in the 2013 version of the elevator code, the traditional “Seismic Zone” approach used in elevator design and installation is no longer applicable.

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