1、ASCEISEI 43-05 American Society of Civil Engineers Seismic Design Criteria for Structures, Systems, and Components in Nuclear Facilities 1 I This document uses both the International System of Units (SI) and customary units. Structural Engineering Institute ASCWSEI 43-05 American Society of Civil En
2、gineers Seismic Design Criteria for Structures, Systems, and Components in Nuclear Facilities This document uses both the International System of Units (SI) and customary units. ASCE Structural Engineering Institute Of lhe American SMielY of Clvil EnqineeE Published by the American Society of Civil
3、Engineers Library of Congress Cataloging-in-Publication Data Structural Engineering Institute. Working Group for Seismic Design Criteria for Nuclear Facilities. Seismic design criteria for structures, systems, and components in nuclear facilities/developed by Working Group for Seismic Design Criteri
4、a for Nuclear Facilities, Dynamic Analysis of Nuclear Smic- tures Subcommittee, Nuclear Standards Committee. p. cm. “This document uses both the International System of Units (SI) Includes bibliographical references and index. and customary units.” ISBN 0-7844-0762-2 1. Nuclear power plants-Earthqua
5、ke effects. 2. Earthquake resis- tant design. I. Structural Engineering Institute. Dynamic Analysis of Nuclear Structures Subcommittee. II. Structural Engineering insti- tute. Nuclear Standards Committee. DI. Title. TK9 152.163.S77 2005 62 1.4832622 2005005011 Published by American Society of Civil
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11、Danvers, MA 01923. The identification for this book is 0-7844- 0762-2/05/ $25.00. Requests for special permission or bulk copying should be addressed to Permissions for fa- cilities where safety, mission, or investment protection are concerns; and where more stringent seismic criteria than provided
12、by building codes are desired. This Standard is intended to be used with ASCE 4, which provides criteria for seismic analysis of safety related nuclear facilities Structures, Systems and Com- ponents (SSCs); AC1 349 for concrete structures; AISC standards for steel structures; ASME standards for me-
13、 chanical systems and components; IEEE standards for electrical systems and components; and ASCE 7 for minimum non-seismic design loads for buildings and other structures. This ASCE Standard specifies seismic load combinations. This Standard uses the Target Performance Goal-based seismic design appr
14、oach documented in U.S. Department of Energy Natural Phenomena Haz- ards (NPH) standards. This Standard is also consistent with the philosophy used in the National Earthquake Hazard Reduction Program (NEHRP) for seismic miti- gation of new and existing facilities. The Standard uses input from ANSVAN
15、S Standard 2.26 to assign Seismic Design Categories (SDCs)” to SSCs. It provides re- quirements for determining design basis seismic load- ing using input from ANSVANS Standards 2.27 and 2.29, and it prescribes design criteria that are tied to structural Limit States. ANS 2.26 employs a graded appro
16、ach to ensure that the level of conservatism and rigor in design is ap- propriate for facility characteristics, such as hazards to * in this Standard, the term “Seismic Design Category” has a differ- ent meaning than in the international Building Code and ASCE 7. workers, the public, and the environ
17、ment. ANS 2.26 specifies five SDCs for classifying SSCs based on their importance and failure consequences. Each SSC has a specified numerical Target Performance Goal. ANS 2.26 also provides descriptive criteria to assist the de- signer in selecting an appropriate Limit State for use in the design o
18、f SSCs. Four Limit States are defined-A, B, C, and D-where A is short of collapse and D is es- sentially elastic behavior. This Standard specifies de- sign criteria for load combinations, including earth- quake ground shaking (i.e., stress, displacement, and ductility limits), such that these Limit
19、States are not exceeded. The combination of SDC and Limit State defines the Seismic Design Basis (SDB) for each SSC. Thus, an SSC with SDB-3C would use criteria for SDC-3 and Limit State C. A total of 20 SDBs are defined in ANS 2.26 that can match seismic design criteria to SSC safety function and i
20、mportance, implementing a graded approach. SDBs defined by SDC 1 and 2 are covered by the approach presented in ASCE 7. This Standard presents design and analysis requirements for SDBs defined by SDC 3,4, and 5 and all Limit States. The approach presented for SDC 3,4, and 5 has been adapted from tha
21、t used in the U.S. Department of Energy Standard 1020, ASCE 4, and the U.S. Nuclear Regulatory Com- mission Standard Review Plan (NUREG-0800). The intended user of this Standard is the designer or analyst involved in the design of a new nuclear structure, system, or component. The Standard is in- te
22、nded to provide a rational basis for the performance- based, risk-consistent seismic design of SSCs in nu- clear facilities. Designers once were initiated into the field of probabilistic design by being taught that seis- mic performance categories for SSCs were established by DOE-STD- 1020-94 and su
23、bsequent revisions. Each performance category was tied to a probabilistic per- formance goal that represented a target annual fre- quency of seismic-induced failure. However, these ear- lier design codes did not allow designers the freedom to select a Limit State (the permissible deformation limit f
24、or the SSC established from functional consider- ations). There has been a movement within the struc- tural engineering community to give designers free- dom to select the desired state of the facility following the Design Basis Earthquake (DBE, defined in ATC- 40, FEMA 273 and FEMA 356, SEAOC-Vision 2000, and ASCE 31). The traditional design Limit State of providing life safety can now be expanded to include nuclear confinement, remain fully functional, or mini- mize operational loss. ix
