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Priestley et al., 2007). Even larger differences appear when numerical estimates are pared to experimental results based on ambient vibration measurements that provide very low period values (see . Navarro et al., 2004). An overview of the different approaches together with a parison of the relevant results is reported in Masi and Vona (2008)。Role of Dynamic Properties on Building VulnerabilityNATO Science for Peace and Security Series C: Environmental Security, 2009, Increasing Seismic Safety by Combining Engineering Technologies and Seismological Data, Pages 147149IntroductionDynamic properties have a major role on the seismic behavior and vulnerability of building structures. Particularly, fundamental periods of vibration are needed, both in design of new buildings and in assessment of existing ones, so that their seismic response can be evaluated.Several codes (. CEN, 2003。對以上問題的進一步研究,強烈要求建立更加寬廣的原地實驗或者是實驗室實驗,得出實驗結(jié)果來估算。這可以是一個非常好的評估工具對于存在的一些干擾(法拉斯等,200