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基于性能的地震工程PBEE (performance-based earthquake engineering)的思想自提出后,全世界地震多发国家(如美国、日本、中国、新西兰、意大利、土耳其、伊朗等)都对其开展了研究和实践。早期PBEE方法在新近地震中暴露出不足的核心问题是在性能评估和设计过程中没有恰当地考虑和处理地震作用及复杂结构非线性行为中的不确定性。为了量化不确定性以及采用更加明确的性能指标...
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Decade of data shows FEMA flood maps missed 3-in-4 claims(图)
Decade data FEMA flood maps missed 3-in-4 claims
2017/9/20
An analysis of flood claims in several southeast Houston suburbs from 1999 to 2009 found that the Federal Emergency Management Agency’s 100-year flood plain maps — the tool that U.S. officials use to ...