| 大跨度钢网架双坡屋面结构分区风荷载风洞试验研究 |
| Experimental Study on Regional Wind Pressure of Large span Steel Truss Double slope Roof Structure |
| 投稿时间：2014-07-06 |
| 中文关键词:大跨度钢网架 双坡屋面 风洞试验 体型系数 脉动风压系数 |
| 英文关键词:large span steel truss double slope roof wind tunnel test shape coefficients fluctuating wind pressure coefficients |
| 基金项目:国家自然基金面上项目(51378323；51108280；51308359)；河北省杰出青年科学基金项目(E2014210138)；土木工程防灾国家重点实验室开放基金资助项目(SLDRCE12 MB 05)；河北省高校百名创新优秀人才支持计划(冀教科［2013］19号) |
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| 中文摘要: |
| 通过某长宽比为5.1∶1的大跨度钢网架双坡屋面结构刚性模型风洞测压试验，得到了结构在不同风向角下的风荷载体型系数，研究了该结构体型系数分布规律、脉动风压系数分布规律以及结构内外表面风荷载分布规律，依据体型系数的不同对结构表面进行了分区，给出了各区域的代表值。结果表明：结构边缘一定宽度范围内，体型系数受流体分离影响较大，其余区域所受影响较小且随风向角变化不明显；结构迎风端脉动风压系数较大，其余区域较小；结构周边建筑对结构体型系数、脉动风压系数、内压系数分布等有一定影响，设计中应考虑周边建筑对结构风荷载的干扰效应。 |
| 英文摘要: |
| Based on a rigid pressure testing model of a large span steel truss double slope roof with an aspect ratio of 5.1∶1, shape coefficients under different wind directions are obtained. Shape coefficients distribution, fluctuating wind pressures and the wind loads on internal and external surface are studied. The roof is divided into several areas based on the shape coefficients and the typical values of those areas are given. Results show that fluid separation will have a greater influence on the shape coefficients of a certain width range on the edge of structure, while the influence of the other areas are relatively small and the change is not obvious under different wind directions. The fluctuating wind pressure coefficients on the windward are relatively high and the other areas are relatively low. Surrounding buildings have an influence on shape coefficients distribution, fluctuating wind pressures, internal wind pressures and so on. The interference effect of surrounding buildings should be taken into consideration in wind loads design. |
| 陆煜,李宗益,马文勇,刘小兵,刘庆宽.大跨度钢网架双坡屋面结构分区风荷载风洞试验研究[J].石家庄铁道大学学报：自然科学版,2015,(3):1-6. |
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