珊瑚格对深圳蛇口邮轮中心表面风压影响的试验研究

珊瑚格结构具有浓厚的海洋文化气息,建筑设计中常被用来装饰临海建筑的结构外立面,但其对建筑表面风压的影响研究较少。通过刚体模型多点同步测压风洞试验方法,对设置不同珊瑚格的深圳蛇口邮轮中心表面风压进行了测试,分析了不同透风率珊瑚格和不同地貌下邮轮中心的幕墙和大跨度屋盖表面风压特性。试验结果表明:设置珊瑚格可以有效降低其背后幕墙和临近屋盖的平均风压系数和脉动风压系数;随着透风率的减小,幕墙和屋盖的平均风压系数和脉动风压系数均逐渐减小,并存在一个最优透风率,使得平均风压系数和脉动风压系数达到最小值;不同地貌下,背风侧的珊瑚格背后幕墙及其临近屋盖的平均风压系数和脉动风压系数均相差不大,迎风侧的珊瑚格背后幕墙及其临近屋盖的平均风压系数也相差不大,但脉动风压系数具有明显的差别。

Experimental study of influences of coral grid structure on surface wind pressures of Shenzhen Shekou Cruise Center

Coral grid structure has a strong atmosphere of marine culture.It is often used to decorate the structural facade of coastal buildings in architectural design,but its impact on the wind pressure on the building surface is rarely studied.Based on the wind tunnel test method of multi-point simultaneous pressure measurement test for rigid body model,the wind pressure on the surface of Shenzhen Shekou Cruise Center with different coral grids was tested,and the wind pressure characteristics of the curtain wall and large-span roof of the cruise center with different ventilation rates and different landforms were analyzed.The test results show that setting coral grid can effectively reduce the average wind pressure coefficient and fluctuating wind pressure coefficient of the curtain wall and the adjacent roof;with the decrease of the ventilation rate,the average wind pressure coefficient and fluctuating wind pressure coefficient of the curtain wall and the roof decrease gradually,and there is an optimal ventilation rate to make the average wind pressure coefficient and fluctuating wind pressure coefficient reach the minimum value;under different landforms,the average wind pressure coefficient and fluctuating wind pressure coefficient of the curtain wall behind the coral grid on the leeward side and its adjacent roof are almost the same,and the average wind pressure coefficient of the curtain wall behind the coral grid on the windward side and its adjacent roof are also the same,but the fluctuating wind pressure coefficient is obviously different.