Investigation of the speed-up effects of wind flow over typical terrains covered by vegetation

摘要

The wind characteristics of 6 typical hills (15°, 30°, 45° escarpments and ridges) covered by grass and forest vegetation were investigated by wind tunnel test. The velocity ratio distribution on the crest and downwind slope were obtained, and the effects of slopes, hill shapes and ground roughness on the wind velocity ratios were summarized. Through comparison with Codes from several countries, 5 recommended revisions were proposed for the current Chinese loadings Codes.