A new simulation method on sliding snow load on sloped roofs
A new simulation method on sliding snow load on sloped roofs
复制标题
坡屋顶滑动雪荷载模拟新方法
DOI：
10.1007/s11069-014-1581-x
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发表时间：
2015-01
期刊：
影响因子：
3.7
通讯作者：
Sun Lulu
中科院分区：
文献类型：
--
作者：
Zhou Xuanyi;Li Jialiang;Gu Ming;Sun Lulu
在寒冷地区，准确计算屋面雪荷载对结构设计具有重要意义。因此，本研究发展一种新的方法来模拟坡屋顶上的滑动雪荷载。首先，正能量吸收的积雪坡屋顶被视为一个关键指标的积雪滑动的基础上，以前的融雪模型的建筑屋顶，并根据现场观测结果从以前的文献。然后，利用该方法对我国几个典型地区的几种坡屋顶的滑动雪荷载进行了数值模拟。分析了屋面坡度、相邻建筑物的遮挡效应以及建筑物内部得热对室内热环境的影响。讨论了雪能含量变化引起的雪滑机理。屋顶坡度对滑雪荷载影响显著。高坡屋顶上的滑动雪荷载明显低于低坡屋顶上的雪荷载。最后，本研究提出了一个简化的公式，作为屋顶坡度，相邻建筑物的屏蔽效果，和传热系数的函数，以方便结构工程师的应用。仿真结果也与一些现行的负荷规范进行了比较。
In cold regions, the accurate evaluation of sliding snow loads on roofs is important in structure design. Hence, this study develops a new method to simulate sliding snow loads on sloped roofs. First, the positive energy absorbed by snowpacks on sloped roofs is regarded as a key indicator of snow sliding based on a previous snowmelt model for building roofs and based on field observation results from the previous literature. Then, the developed method is used to simulate the sliding snow loads on several sloped roofs of several representative regions in China. The impacts of roof slope, shielding effect of neighboring buildings, and heat gained from within buildings are analyzed. The mechanism of snow slide caused by change of snow energy content is discussed. Roof slope is found to affect sliding snow load significantly. The sliding snow load on a high-sloped roof is considerably lower than that on a low-sloped roof. Finally, this study presents a simplified formula of sliding snow load as a function of roof slope, shielding effect of neighboring buildings, and heat transfer coefficients for convenient application of structural engineers. Simulation results are also compared with those from some current load codes.
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影响因子：
4.6
作者：
Dai X;Huang N
通讯作者：
Huang N
DOI：
10.3130/aijs.65.53_2
发表时间：
2000
期刊：
Journal of Structural and Construction Engineering (transactions of Aij)
影响因子：
--
作者：
M. Takakura;Takahiro Chiba;Toshiyuki Ito;T. Tomabechi
通讯作者：
M. Takakura;Takahiro Chiba;Toshiyuki Ito;T. Tomabechi
影响因子：
3.2
作者：
R. Ranzi;G. Grossi;B. Bacchi
通讯作者：
R. Ranzi;G. Grossi;B. Bacchi
DOI：
10.1061/(asce)0733-9445(1987)113:8(1820
发表时间：
1987-08
期刊：
Journal of Structural Engineering-asce
影响因子：
--
作者：
R. Sack;D. Arnholtz;Jess S. Haldeman
通讯作者：
R. Sack;D. Arnholtz;Jess S. Haldeman
DOI：
10.11449/sasj1971.32.69
发表时间：
2001-09
期刊：
Journal of the Society of Agricultural Structures, Japan
影响因子：
--
作者：
Toshimichi Kobayashi;Takahiro Chiba;T. Tomabechi;S. Hoshiba
通讯作者：
Toshimichi Kobayashi;Takahiro Chiba;T. Tomabechi;S. Hoshiba