Performance-Based Design in the Central and Eastern United States
Performance-Based Design in the Central and Eastern United States
复制标题
美国中部和东部的基于性能的设计
DOI：
10.1061/9780784413357.207
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发表时间：
2014
影响因子：
2.7
通讯作者：
F. Charney
中科院分区：
文献类型：
--
作者：
J. Judd;F. Charney
在美国中部和东部（CEUS）的地震危险性是明显的相比，美国西部（WUS），由于较低的地震复发率，一般较慢的波传播衰减，独特的网站响应，并增加高频内容的地面运动。这些差异对基于性能的设计有着深远的影响。在CEUS中，较硬基岩（Vs= 2，000 m/s）的地震动数据比常规（Vs= 760 m/s）数据更合适。对于CEUS，由中小事件引起的谱加速度平均约为MCE的5-15%，而WUS为MCE的13-20%。因此，服务水平的地面运动是不太可能是显着的新建筑物。在CEUS中，灾害通常由远距离地震主导，地面运动的总体持续时间可能更长，这意味着非韧性结构可能更容易受到破坏。
In the central and eastern United States (CEUS) seismic hazard is distinct compared to the western United States (WUS) due to lower earthquake recurrence rates, generally slower attenuation of wave propagation, unique site response, and increased high-frequency content in ground motion. These differences have profound implications for performance-based design. In the CEUS, ground motion data for harder bedrock (Vs= 2,000 m/s) is more appropriate than the conventional (Vs= 760 m/s) data. Spectral accelerations caused by small and medium events are on the order of 5-15% of the MCE, on average, for the CEUS, compared to 13-20% of the MCE for the WUS. As a result, serviceability-level ground motions are unlikely to be significant for new buildings. In the CEUS, hazard is often dominated by distant earthquakes and overall duration of ground motion is likely to be longer, inferring that non-ductile structures may be more susceptible to damage.