Building Anti-seismic Design Regulations in the United States and Its Approach to Ground Motion Design
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摘要: 本文论述了美国建筑抗震设计法规体系发展演变过程及其代表性的规范、标准与技术文档；分析了美国当前建筑法规中设计地震动参数的重要技术见解，设计地震动的不同层次与作用，基于目标风险的最大考虑地震概念等技术的进展，同时，也总结了美国抗震设计相关法规中设计地震动确定的基本规定。本文旨在从美国庞大复杂的建筑设计法规体系中，梳理出清晰的建筑抗震设计的法规体系脉络与设计地震动的要求，为我国建筑抗震设计中设计地震动的相关研究提供参照。Abstract: In this paper, we introduced the evaluation of building seismic design regulation, and some typical codes, standards and documents of the United States.We also discussed and analyzed the new insights into design ground motion parameters, different levels design ground motion connected with difference design performance, the concept of Risk-targeted Maximum Consider Earthquake, and all that technical developments in the US building codes and standards.Then, the provisions about seismic design ground motion are summarized.The purpose of this paper is clearly to reveal the relation of regulatory requirements on building seismic design in the United States from complex system including building codes, consensus standards and the usage of seismic design ground motion. The research work in this paper will be helpful for the seismic design ground motion in China.
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Key words:
- Building seismic design /
- Seismic design ground motion /
- Model code /
- Consensus standard /
- NEHRP Provisions /
- ASCE 7 /
- MCER
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图 1 NEHRP Provisions 2009设计反应谱（FEMA，2009）
Figure 1. Design response spectrum of NEHRP Provisions 2009(FEMA, 2009)
表 1 场地调整系数Fa（FEMA，2009）
Table 1. Site coefficient, Fa (FEMA, 2009)
场地类别 短周期段加速度反应谱值参数 SS≤0.25 SS=0.5 SS=0.75 SS=1.0 SS≥1.25 A 0.8 0.8 0.8 0.8 0.8 B 1.0 1.0 1.0 1.0 1.0 C 1.2 1.2 1.1 1.0 1.0 D 1.6 1.4 1.2 1.1 1.0 E 2.5 1.7 1.2 0.9 0.9 F 开展场地反应分析确定 
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表 2 场地调整系数Fv（FEMA，2009）
Table 2. Site coefficient, Fv (FEMA, 2009)
场地类别 短周期段加速度反应谱值参数 SS≤0.25 SS=0.5 SS=0.75 SS=1.0 SS≥1.25 A 0.8 0.8 0.8 0.8 0.8 B 1.0 1.0 1.0 1.0 1.0 C 1.7 1.6 1.5 1.4 1.3 D 2.4 2.0 1.8 1.6 1.5 E 3.5 3.2 2.8 2.4 2.4 F 开展场地反应分析确定
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