原文传递
Vertical Load Path Failure Risk Analysis of Residential Wood-Frame Construction in Tornadoes
| 题名： | Vertical Load Path Failure Risk Analysis of Residential Wood-Frame Construction in Tornadoes |
| 正文语种： | 英文 |
| 作者： | Christine D. Standohar-Alfano, S.M.ASCE; John W. van de Lindt, F.ASCE;Bruce R. Ellingwood, Dist.M.ASCE |
| 作者单位： | Insurance Institute for Business and Home Safety;Colorado State Univ |
| 关键词： | Fragility; Hazard analysis; Residential structures; Tornado; Wind engineering; Wood; Wind effects. |
| 摘要： | Since the devastating 2011 tornado season, there has been renewed interest in understanding tornado wind loads and developing methodologies to reduce the risk of tornado damage. This study focuses on the assessment of the system-level performance of five different residential light-frame wood building archetypes subjected to tornado winds. The system-level performance considered three critical com-ponents along the vertical load path within each building, namely, the roof sheathing, roof-to-wall connection, and wall-to-foundation anchorage. Although there has been significant work on each of these components independently, combined uplift and lateral forces have received less attention. Therefore, a laboratory testing program for wood shear walls, reported herein, was performed to determine the wallfailure mechanisms and capacities when subjected to combined shear and uplift forces. Each building archetype was designed at varying locations across the United States based on the current residential building code and/or observed practice. Fragilities were developed, based on the assumption that failure of any component along the vertical load path results in failure of the system. Because the forces in each connection along the vertical load path arise from the same tornado wind load, the connection failures are not statistically independent, and Monte Carlo simulation was applied to perform the system reliability analysis. DOI: 10.106l/(ASCE)ST.1943-541X.0001775. © 2017 American Society of Civil Engineers. |
| 出版日期： | 2017.07 |
| 出版年： | 2017 |
| 期刊名称： | Journal of Structural Engineering |
| 卷： | Vol.143 |
| 期： | NO.07 |
| 页码： | 04017045 |
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