Effect of gas resonance on wind tunnel experiment for internal pressure in a building with a dominant opening
YU Xian-feng1,2 XIE Zhuang-ning2 LIU Hai-ming1 ZHANG Cheng3 WANG Xu1 DONG Rui1
1. State Key Laboratory of Bridge Engineering Structural Dynamics, China Merchants Chongqing Communication Research & Design Institute Co., Ltd., Chongqing 400067, China;
2. State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou 510640, Guangdong, China)
3. Shenzhen Bridge Design & Research Institute Co., Ltd., Shenzhen 518052, Guangdong, China
4. State Key Laboratory Breeding Base of Mountain Bridge and Tunnel Engineering, Chongqing Jiaotong University, Chongqing 400074, China
The effect of gas resonance on wind tunnel experiment for internal pressure in a building, especially in a two-compartment or multi-compartment building, with a dominant opening cannot be omitted. Similarity and additional internal volume requirements for internal pressure experiment are firstly described. The building internal cavity volume used at model-scale should be distorted by a factor equaling the square of the ratio of the full-scale to model-scale velocities, and the additional internal volume must be a deep and narrow cavity. Then, the gas natural frequency equation is introduced from reciprocating compressor piping system into wind tunnel studies on internal pressure. Finally, wind tunnel experiments on internal pressure for a two-compartment building with two kinds of additional distorted volumes are carried out. Results show that the measured internal pressure response will be inaccurate because of the influence of gas resonance when the additional distorted volumes are much deeper and narrower.
余先锋 1，2，谢壮宁 2?，刘海明 1，张承 3，王旭1，董锐 1. 气柱共振对开洞结构内压风洞试验的影响[J]. 振动与冲击, 2018, 37(4): 55-59.
YU Xian-feng1,2 XIE Zhuang-ning2 LIU Hai-ming1 ZHANG Cheng3 WANG Xu1 DONG Rui1. Effect of gas resonance on wind tunnel experiment for internal pressure in a building with a dominant opening. JOURNAL OF VIBRATION AND SHOCK, 2018, 37(4): 55-59.
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