Multiplication factor for open ground storey buildings–a reliability based evaluation

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• 作者：D. C. Haran Pragalath ; Bhosale Avadhoot…
• 刊名：Earthquake Engineering and Engineering Vibration
• 出版年：2016
• 出版时间：June 2016
• 年：2016
• 卷：15
• 期：2
• 页码：283-295
• 全文大小：1,522 KB
• 刊物类别：Engineering
• 刊物主题：Vibration, Dynamical Systems and Control
  Chinese Library of Science
  
• 出版者：Institute of Engineering Mechanics (IEM), China Earthquake Administration
• ISSN：1993-503X
• 卷排序：15

文摘

Open Ground Storey (OGS) framed buildings where the ground storey is kept open without infill walls, mainly to facilitate parking, is increasing commonly in urban areas. However, vulnerability of this type of buildings has been exposed in past earthquakes. OGS buildings are conventionally designed by a bare frame analysis that ignores the stiffness of the infill walls present in the upper storeys, but doing so underestimates the inter-storey drift (ISD) and thereby the force demand in the ground storey columns. Therefore, a multiplication factor (MF) is introduced in various international codes to estimate the design forces (bending moments and shear forces) in the ground storey columns. This study focuses on the seismic performance of typical OGS buildings designed by means of MFs. The probabilistic seismic demand models, fragility curves, reliability and cost indices for various frame models including bare frames and fully infilled frames are developed. It is found that the MF scheme suggested by the Israel code is better than other international codes in terms of reliability and cost.Keywordsopen ground storeyseismic riskmultiplication factorfragility curvesreliability index