PERMISSIBLE RESIDUAL DEFORMATION LEVELS FOR BUILDING STRUCTURES CONSIDERING BOTH SAFETY AND HUMAN ELEMENTS
PERMISSIBLE RESIDUAL DEFORMATION LEVELS FOR BUILDING STRUCTURES CONSIDERING BOTH SAFETY AND HUMAN ELEMENTS
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发表时间：
2008
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鉴于人们对基于性能的抗震设计和自定心系统越来越感兴趣，对允许的残余变形水平进行了审查。允许的残余变形水平是根据功能、施工公差和安全性来考虑的。价值观的定义是基于过去的结构工程研究，震后勘察，目前的建筑规范，并在心理学领域的研究。研究结果表明，只有有限数量的研究测量了地震后结构的残余漂移水平，并将其与实际损坏水平相关联。一般来说，施工公差保持在或低于0.003弧度，这取决于所考虑的结构系统和材料的类型。该值低于非结构系统开始失去功能的残余漂移水平。心理学领域的研究也表明，人们可以感觉到倾斜的下限大约是0.005拉德，超过该下限，长时间的倾斜会导致头痛和头晕。为了验证这些发现，并提供进一步的定量结果，地板倾斜和柱倾斜的占用40岁的结构进行了调查。这些结果与通过广泛的文献综述得到的结果相结合表明，0.005弧度是一个重要的工程指标，在允许的残余变形水平。
A review of permissible residual deformation levels is undertaken in light of the increased interest in performance-based seismic design and self-centering systems. Permissible residual deformation levels are considered based on functionality, construction tolerances, and safety. Values are defined based on a review of past structural engineering research, post-earthquake reconnaissance, current building codes, and research in the field of psychology. The findings show that there are only a limited number of studies that measured residual drift levels of structures after an earthquake and correlated these to actual damage levels. In general, construction tolerances remain at or below 0.003 rad depending on the type of structural system and material being considered. This value is below the residual drift levels at which non-structural systems start to lose functionality. Research in the field of psychology has also shown that the lower limit at which people can sense an inclination is approximately 0.005 rad above which extended periods of inclination can cause headaches and dizziness. In order to verify these findings and provide further quantitative results, floor inclinations and column tilt of an occupied 40 year old structure are investigated. These results combined with those obtained through the extensive literature review suggest that 0.005 rad is an important engineering index in terms of permissible residual deformation levels.