By Structural Engineering Institute
ASCE/SEI 43-05 offers stringent layout standards for nuclear amenities. because of the strength threat linked to nuclear risks, it truly is fascinating that nuclear amenities have a reduce chance that structural harm could be because of earthquake than do traditional amenities. The objective of this regular is to make sure that nuclear amenities can face up to the consequences of earthquake flooring shaking with wanted functionality. This common can be of use to any designers or analysts keen on the layout of latest nuclear constructions, structures, or elements. themes comprise: • evaluate of Seismic call for • overview of Structural capability • Load combos and reputation standards for constructions • Ductile Detailing requisites • apparatus and Distribution structures • and Seismic caliber Provisions
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Additional info for American Society of Civil Engineers seismic design criteria for structures, systems, and components in nuclear facilities
4 is the equipment capacity factor for qualification by test or TES that provides the margin to obtain the required confidence level of performance. , functional requirements or structural integrity) that defines its acceptance criteria. 2 Demand for Qualification by Earthquake Experience Data The demand for qualification by use of earthquake experience data is given by the following equation: D ϭ DNS ϩ DS (Eq. 1. 0 on DS is the equipment capacity factor for qualification by use of earthquake experience data.
Alternately, stress limit coefficients in AISC N690 and its Supplement No. 1, appropriate for load combinations that include the Safe Shutdown Earthquake (SSE), can be used to scale the AISC/ASD-allowable stresses to LRFD strengthbased nominal code capacities. AISC N690 shall be modified by the ANSI/AISC 341-02 Provisions, where appropriate. 5 Reinforced Masonry Design of reinforced masonry structures shall be based on strength design methods. In the strength method, the nominal capacity of reinforced masonry 15 SEISMIC DESIGN CRITERIA FOR STRUCTURES, SYSTEMS, AND COMPONENTS IN NUCLEAR FACILITIES elements shall be calculated in accordance with the IBC, Section 2108.
These systems are unacceptable due to either large interstory drifts at high seismic demands or brittle failure mechanisms. Structural systems specifically prohibited for use in the design of the lateral-force–resisting system of nuclear facilities include the following: • • • • Ordinary moment-resisting frame systems Intermediate moment-resisting frame systems Plain concrete systems Precast concrete systems, which use gravity-only bearing connections • Unreinforced masonry systems • Wood structures The use of other systems listed in NEHRP design provisions or in the IBC must be justified.