| 建筑屋面滑移雪荷载的模拟方法研究 |
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| 引用本文： | 周晅毅,张运清,顾 明.建筑屋面滑移雪荷载的模拟方法研究[J].工程力学,2014,31(6):190-196. |
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| 作者姓名： | 周晅毅 张运清 顾 明 |
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| 作者单位： | 1.同济大学土木工程防灾国家重点实验室, 上海 200092 |
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| 基金项目： | 国家自然科学基金面上项目(51278368);科技部国家重点实验室基金项目(SLDRCE08-A-03);中央高校基本科研业务费专项资金项目;教育部留学回国人员科研启动基金项目 |
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| 摘 要： | 滑移雪荷载是屋面雪荷载的重要组成部分, 该文发展了计算屋面滑移雪荷载的模拟方法. 首先, 基于前人提出的能量及质量平衡模型, 并针对建筑屋面积雪的特点, 构造了建筑屋面融雪模型. 在此基础上, 提出将屋面积雪中液态水超过积雪最大持水量时作为屋面雪层开始滑移的判定条件. 利用该文方法对我国几个代表性地区的屋面滑移雪荷载进行了模拟, 分析了不同地区的气象特征、邻近建筑对屋面积雪的遮挡等因素对滑移雪荷载的影响；同时定量分析了各个能量对滑移雪的贡献大小.
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| 关 键 词： | 积雪滑落 能量及质量平衡模型 建筑屋面融雪模型 积雪最大持水量 滑移雪荷载 |
| 收稿时间： | 2012-12-30 |
METHOD FOR SIMULATING SLIDING SNOW LOADS ON ROOFS |
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| Affiliation: | 1.State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China2.Shandong Provincial Communications planning and Design Institute, Jinan 250031, China |
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| Abstract: | Sliding snow loads are an important component of snow loading on roofs. A simulation method for sliding snow loads is developed in this paper. Firstly, based on previously developed mass and energy balance models, a building roof snowmelt model is developed, which focuses on the features of the snowpack. Based on this model, it is proposed that the sufficient condition for roof snow sliding is that the liquid water in the snow exceeds the maximum water capacity of snow. Using the method for calculating sliding snow load proposed in the paper, simulations of the sliding snow loads on roofs in several representative areas in China are performed, and the influences from climate features and shielding effects of neighboring buildings are analyzed. At the same time the contributions of a variety of energies to snow sliding are presented quantitatively. |
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