Experimental investigation on influence of terrain complexity for wind pressure of low-rise building
Experimental investigation on influence of terrain complexity for wind pressure of low-rise building
复制标题
地形复杂性对低层建筑风压影响的试验研究
DOI：
10.1016/j.jobe.2023.108350
复制
发表时间：
2023-12
影响因子：
6.4
通讯作者：
L. An;Sungmoon Jung
中科院分区：
文献类型：
--
作者：
L. An;Sungmoon Jung
本研究进行了广泛的风洞试验，以评估地形复杂性对低层建筑风压的影响。在美国使用50个实际地形形态进行了一系列风洞试验。研究结果进行了比较，从均匀的地形上的测试，以辨别压力系数的变化。湍流强度显着增加，观察到在复杂的异质地形，即使具有类似的有效粗糙度长度。增强的湍流特性是解释Cp，mean变化的关键因素。随着湍流强度的增加，迎风壁和屋顶1区域的Cp，平均值持续上升。这种相关性甚至适用于Iu，平均值超过0.3。而Cp、RMS随Iu、Eave的增加而增加，但没有出现连续增加的现象。因此，在这方面，同质和异质地形之间没有明显的差异。这些发现强调了在风荷载评估中考虑地形复杂性的重要性，特别是在地形多样性增强的情况下，以减轻风荷载评估中的潜在错误。
This study conducted extensive wind tunnel tests to evaluate the impact of terrain complexity on wind pressure across low-rise buildings. A series of wind tunnel tests was performed using 50 actual terrain morphologies in the US. The findings were compared with results obtained from testing on homogeneous terrain to discern variations in pressure coefficients. A notable increase in turbulence intensity was observed in complex heterogeneous terrains, even with similar effective roughness lengths. The heightened turbulence property was a crucial factor in explaining changes inCp,mean. The magnitude ofCp,meandemonstrated a continuous rise in the windward wall and roof 1 regions with increasing turbulence intensity. This correlation held true even forIu,eavevalues surpassing 0.3. In contrast, whileCp,RMSexhibited a tendency to increase with risingIu,eave, it did not exhibit the same continuous increase phenomenon. Consequently, no significant disparity in magnitude was noted between homogeneous and heterogeneous terrains in this regard. These findings underscore the importance of accounting for terrain complexity in wind load assessments, particularly in scenarios of heightened terrain diversity, to mitigate potential errors in wind load evaluations.