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These two factors—the nature of the building's occupancy and the type of soil it rests upon—could place the structure in an SDC equivalent to that for seismic zones 3 or 4, indicating high seismic risk. To bring the design up to par with the current practice of designing with a 1.5 margin against collapse, a 2/3 value (the reciprocal of 1.5) of the MCE is used in design. All other components are given an I p of 1.0. 2.
These two factors—the nature of the building's occupancy and the type of soil it rests upon—could place the structure in an SDC equivalent to that for seismic zones 3 or 4, indicating high seismic risk. an essential facility such as a hospital can be easily made in the heat of the ... treatment facility for the region most heavily impacted by this seismic event. Consider, for example, the design of an essential facility such as a hospital in Charlotte, North Carolina on a site with a soft soil profile. Hospital resilience can also be improved through putting in place a wide variety of flexible plans, such as cooperation with other facilities, strategies to prioritize and maintain critical care functions, and strategies to surge emergency resources, medications, and staff . Two sets of eight (a total of 16) maps give the maximum considered response accelerations at short periods of 0.2 seconds Ss, and at one-second periods S1. Moreover, it guarantees that the probability of exceedance of the damage limit state decreases, as expected. The spectral response accelerations Ss and S1 are specified on the seismic hazard maps prepared by the United States Geological Survey (USGS). Design ground motion parameters are determined from mapped values of Ss and S1 rather than the seismic zone factor Z.
The importance factor increase enhances the base shear design directly, and seismic provisions expect that the probability of damage of the structure under earthquake can be decreased. By continuing you agree to the Copyright © 2020 Elsevier B.V. or its licensors or contributors.
General considered parameters in seismic provisions are: PGA, importance factor (I) and typical inherent overstrength and global ductility capacity (R). The modified values denoted as SMS and SM1 are the maximum considered earthquake (MCE), which has a 2% probability of occurrence in 50 years corresponding approximately to a 2500-year recurrence interval. Component Importance Factor, Ip.
The PGA randomness results reveal that considering PGA uncertainty does not mean that the probability of damage exceedance will be increased in general cases.Peer review under responsibility of Sharif University of Technology.We use cookies to help provide and enhance our service and tailor content and ads. With the latest Does this affect the design of a structure in a low seismic risk zone? 2 Special Seismic Certification is Also Known As (AKA): •Seismic Qualification of Equipment and Components (IBC 2006 Section 1708.5 and CBC 2007 Section 1708A.5) •Special Certification for Designated Seismic System (ASCE 7-05 Section 13.2.2) Nick Names In coastal California, a 2500-year earthquake is considered the largest possible earthquake and, it is the considered opinion of the engineering community that a building with proper seismic details designed for an earthquake of 475-year recurrence interval, has a margin of safety of 1.5 against collapse in an MCE event.
These two factors—the nature of the building's occupancy and the type of soil it rests upon—could place the structure in an SDC equivalent to that for seismic zones 3 or 4, indicating high seismic risk. To bring the design up to par with the current practice of designing with a 1.5 margin against collapse, a 2/3 value (the reciprocal of 1.5) of the MCE is used in design. All other components are given an I p of 1.0. 2.
These two factors—the nature of the building's occupancy and the type of soil it rests upon—could place the structure in an SDC equivalent to that for seismic zones 3 or 4, indicating high seismic risk. an essential facility such as a hospital can be easily made in the heat of the ... treatment facility for the region most heavily impacted by this seismic event. Consider, for example, the design of an essential facility such as a hospital in Charlotte, North Carolina on a site with a soft soil profile. Hospital resilience can also be improved through putting in place a wide variety of flexible plans, such as cooperation with other facilities, strategies to prioritize and maintain critical care functions, and strategies to surge emergency resources, medications, and staff . Two sets of eight (a total of 16) maps give the maximum considered response accelerations at short periods of 0.2 seconds Ss, and at one-second periods S1. Moreover, it guarantees that the probability of exceedance of the damage limit state decreases, as expected. The spectral response accelerations Ss and S1 are specified on the seismic hazard maps prepared by the United States Geological Survey (USGS). Design ground motion parameters are determined from mapped values of Ss and S1 rather than the seismic zone factor Z.
The importance factor increase enhances the base shear design directly, and seismic provisions expect that the probability of damage of the structure under earthquake can be decreased. By continuing you agree to the Copyright © 2020 Elsevier B.V. or its licensors or contributors.
General considered parameters in seismic provisions are: PGA, importance factor (I) and typical inherent overstrength and global ductility capacity (R). The modified values denoted as SMS and SM1 are the maximum considered earthquake (MCE), which has a 2% probability of occurrence in 50 years corresponding approximately to a 2500-year recurrence interval. Component Importance Factor, Ip.
The PGA randomness results reveal that considering PGA uncertainty does not mean that the probability of damage exceedance will be increased in general cases.Peer review under responsibility of Sharif University of Technology.We use cookies to help provide and enhance our service and tailor content and ads. With the latest Does this affect the design of a structure in a low seismic risk zone? 2 Special Seismic Certification is Also Known As (AKA): •Seismic Qualification of Equipment and Components (IBC 2006 Section 1708.5 and CBC 2007 Section 1708A.5) •Special Certification for Designated Seismic System (ASCE 7-05 Section 13.2.2) Nick Names In coastal California, a 2500-year earthquake is considered the largest possible earthquake and, it is the considered opinion of the engineering community that a building with proper seismic details designed for an earthquake of 475-year recurrence interval, has a margin of safety of 1.5 against collapse in an MCE event.