Probabilistic characterization of roof panel uplift capacity under wind loading
Probabilistic characterization of roof panel uplift capacity under wind loading
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风荷载作用下屋面板举升能力的概率表征
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
H. Hong
中科院分区：
文献类型：
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作者：
W. He;H. Hong
屋顶系统的完整性对于居民的安全非常重要，并可以防止轻型框架木结构受到过度损坏。使用实验测试和数值模型研究了紧固屋顶板的举升能力。尽管拔钉时的力-变形关系是非线性且不确定的，但实验研究中经常采用单调增加的均匀静压，并通过假设支流面积法足够并且紧固件可以建模为线性弹性弹簧来进行数值建模。本研究旨在通过纳入钉子拔出行为的不确定性来评估随机风压下屋顶板的提升能力的统计特征和建模能力。结果表明，需要考虑退钉的非线性行为，以提高估计抗拔能力的准确性；提升能力的统计和概率模型受面板内紧固件行为的相关程度影响；钉距和缺钉对举升能力影响显着。
The integrity of the roof system is important to the safety of inhabitants and prevents excessive damage to light-frame wood structures. The uplift capacity of fastened roof panels has been investigated using experimental tests and numerical models. Monotonically increasing uniform static pressure is often employed in experimental investigations and numerical modeling is carried out by assuming that the tributary area method is adequate and the fasteners can be modeled as linear elastic springs, even though the force–deformation relationship for nail withdrawal is nonlinear and uncertain. This study is aimed at assessing the statistical characteristics and modeling the uplift capacity for the roof panel under stochastic wind pressure by incorporating the uncertainty in nail withdrawal behaviour. The results show that the nonlinear behaviour of nail withdrawal needs to be considered to improve the accuracy of the estimated uplift capacity; the statistics and the probability model of the uplift capacity are affected by the degree of correlation of the fastener behaviour within the panel; and that nail spacing and missing nails influence the uplift capacity significantly.