Seismic Code Decisions Under Risk: A Model Analysis for the Wasatch Front

在瓦萨奇阵线最近的地震法规决定中，出现了几个具有国家重要性的问题。这项研究将使用地震风险分析来阐述这些决策的相关特征。将特别注意：(1)对地学和结构工程问题的系统意见差异；(2)不同类型建筑物在设计到更高抗震规范水平的成本升级方面的差异；(3)高软弱表土场地动力放大系数的潜在影响；(4)构造地震风险统计以产生决策的不同方法的优缺点。对瓦萨奇断层的模型应用将有助于开发这些地震风险方法。还将为洛杉矶地区编制风险统计数据，以正确看待Wasatch Front的统计数据。

Several concerns of national importance have surfaced in recent seismic code decisions in the Wasatch Front. This study will use seismic risk analysis to elaborate relevant features of these decisions. Particular attention will be paid to: (1) systematic differences of opinions on geoscience and structural engineering issues; (2) differences among different types of buildings in cost upgrades for designing to higher seismic code levels; (3) potential implications of high soft surfacial soil site dynamic amplification factors; and of (4) strengths and weaknesses of diverse ways of structuring seismic risk statistics in order to yield a decision. A model application to the Wasatch fault will assist in developing these seismic risk methods. Risk statistics will also be produced for the Los Angeles region to put Wasatch Front statistics into perspective.