ANSI/AISC N690-24 PDF Download
The 2024 Specification for Safety-Related Steel Structures for Nuclear Facilities (ANSI/AISC N690-24) is available as a free download below. This standard supersedes the 2018 edition and is derived from the 2022 Specification for Structural Steel Buildings. The latest revision of this standard includes significant updates to the requirements for steel-plate composite structural elements incorporating the latest research, a new appendix containing special design provisions for impactive and impulsive loading, and modifications to the nondestructive testing provisions for ultrasonic and radiographic testing.
ANSI/AISC N690-24《核设施安全相关钢结构规范》PDF下载
2024年10月发布的最新版，距首次出版已40周年，替代2018版，并同步吸收AISC 360-22《建筑钢结构规范》的最新成果。核心更新包括：
1. 钢板-混凝土组合构件（SC模块墙、叠合板）的完整设计公式与构造要求，适用于安全壳、屏蔽厂房等关键厂房；
2. 新增**冲击与脉冲荷载附录**，提供飞机撞击、管道破裂甩击、飞射物等极端事件的强度与稳定性验算方法，填补核工程特殊荷载空白；
3. 升级**超声波与射线无损检测**条款，提高焊缝质量等级，满足NRC最新审查大纲；
4. 引入**火灾工况附录N4**，在ANSI/AISC 360-22附录4基础上，给出核安全相关钢结构的耐火极限与临界温度修正系数，可直接用于性能化防火设计。
