Research on reliability of steel roof structures subjected to snow loads at representative sites in China
Research on reliability of steel roof structures subjected to snow loads at representative sites in China
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我国代表性场地雪荷载作用下钢屋盖结构可靠性研究
DOI：
10.1016/j.coldregions.2017.09.005
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发表时间：
2017-09
影响因子：
4.1
通讯作者：
Gu Ming
中科院分区：
文献类型：
--
作者：
Qiang Shengguan;Zhou Xuanyi;Gu Ming
合理的雪荷载概率描述在可靠性分析中具有重要意义。本文基于积雪融雪模型模拟的地面积雪荷载样本，详细研究了年最大地面积雪荷载的概率分布。然后，发现地面雪荷载的概率分布函数的选择和参数估计方法对可靠性评估结果有很大影响。对中国四个有代表性的钢屋盖结构构件在雪荷载作用下的可靠度进行了研究。所研究的屋顶的可靠度指标不足以达到目标值3.2。其原因可能是中国荷载规范中规定的地面雪荷载特征值不保守，且对屋面雪荷载的偏因子1.4不够。为保证设计屋面在极端雪荷载作用下的可靠性指标达到目标3.2，雪荷载的偏因子应随地面雪荷载的COV而变化。
An appropriate probabilistic description of snow loads is important in reliability analysis. Probability distributions for annual maximum ground snow loads are studied in detail in this paper based on the samples of snow loads on the ground, which are simulated by a snowmelt model. Then, selection of probability distribution function and parameter estimation method for ground snow loads is found to have a great influence on reliability assessment results. The reliability of members of steel roof structures subjected to snow load at four representative sites in China is investigated. The reliability indices of studied roofs are found not to be enough to reach the target value 3.2. The possible reason is that characteristic value of snow loads on the ground specified in Chinese load code is not conservative and the partial factor 1.4 for snow loads on roofs is not enough. To ensure designed roofs subjected to extreme snow loads a target reliability index 3.2, large partial factors for snow load that varies with COV of ground snow loads are expected to be used.
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影响因子：
3.7
作者：
MASSEY, FJ
通讯作者：
MASSEY, FJ
DOI：
--
发表时间：
2007
期刊：
--
影响因子：
--
作者：
Jason Butke
通讯作者：
Jason Butke
DOI：
10.1061/9780784404454
发表时间：
1990
期刊：
--
影响因子：
--
作者：
E. Cohen
通讯作者：
E. Cohen
影响因子：
3.2
作者：
A. Wiin-nielsen;Margaret Drake
通讯作者：
A. Wiin-nielsen;Margaret Drake
影响因子：
2.7
作者：
M. Wilk;R. Gnanadesikan
通讯作者：
M. Wilk;R. Gnanadesikan