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AISC345-05 Seismic Provisions for Structural Steel Buildings
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  • 更新时间:2008-04-20
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The AISC Specification for Structural Steel Buildings (ANSI/AISC 36-05) is intended to cover common design criteria. Accordingly, it is not feasible for it to also cover all of the special and unique problems encountered within the full range of structural design practice. This document, the AISC Seismic Provisions for Structural Steel Buildings (ANSI/AISC 341-05) with Supplement No.1 (ANSI/AISC 341s1-05) (hereafter referred to as the Provisions) is a separate consensus standard that addresses one such topic: the design and construction of structural steel and composite structural steel/reinforced concrete building systems for high-seismic applications. Supplement No.1 consists of modifications made to Part I, Section 14 of Provisions after the initial approval had been completed.

These Provisions are presented in two parts: Part I is intended for the design and construction of structural steel buildings, and is written in a unified format that addresses both LRFD and ASD; Part II is intended for the design and construction of composite structural steel/reinforced concrete buildings, and is written to address LRFD only. In addition, seven mandatory appendices, a list of Symbols, and Glossary are part of this document. Terms that appear in the Glossary are generally italicized where they first appear in a sub-section, throughout these Provisions. A nonmandatory Commentary with background information is also provided.

The previous edition of the AISC Seismic Provisions for Structural Steel Buildings, approved on May 21, 2002, incorporated many of the advances achieved as part of the FEMA/SAC program and other investigations and developments related to the seismic design of steel buildings. Recognizing that rapid and significant changes in the knowledge base were occurring for the seismic design of steel buildings, especially moment frames, the AISC Committee on Specifications committed to generating frequent supplements to the Provisions. This commitment was intended to keep the provisions as current as possible.

These Provisions were modified to be consistent with SEI/ASCE 7-05, Minimum Design Loads for Buildings and Other Structures. Although this standard adopts SEI/ASCE 7-02, it was being developed in parallel with SEI/ASCE 7-05. It is anticipated that ASCE will publish a supplement to SEI/ASCE 7-05 in 2006 that will adopt ASNI/AISC 341 and 360 by reference. We encourage anyone who is using these AISC standards to use them in conjunction with SEI/ASCE 7-05 including Supplement No.1, when it becomes available.

This allows these Provisions to be incorporated by reference into both the 2006 IBC and 2006 NFPA 5000 building codes, each of which uses SEI/ASCE 7-05 as its basis for design loadings. Because the extent of changes and the unified format is so large, they are being republished in their entirety. The most significant modification is that two systems initially developed and incorporated into the 2003 NEHRP Provisions, the buckling-restrained braced frame (BRBF) and the special plate shear wall (SPSW) have been added to the Provisions. A major update to the commentary is also provided.

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