建筑结构学报2024，Vol.45Issue(5)：115-124,10.DOI:10.14006/j.jzjgxb.2023.0308
带竖向肋条高层建筑风荷载的测力测压对比
Comparison of wind loads on high-rise buildings with vertical ribs obtained by force balance and pressure measuring tests
摘要
Abstract
In order to investigte the influence of vertical ribs on the wind loads of high-rise buildings,multiple point synchronous pressure(MPSP)and high-frequency force balance(HFFB)testing in a wind tunnel was carried out.On each face of the high-rise structures,the wind pressure distribution was examined in relation to the effect of the rib extension length to building width ratio(b/B).Then the mean and standard deviation of base shears obtained using MPSP and HFFB tests were compared.The testing results show that the outermost wind pressures on the windward side of the building are significantly reduced and even change to negative pressure in the windward direction.Furthermore,the absolute value of negative wind pressure on the leeward side of the building decreases with increase of the b/B.When b/B is in the range of 1％-3％,the mean base shears obtained from the HFFB tests are larger than those obtained from the MPSP tests for all wind angles.This is mainly due to the fact that the MPSP tests cannot consider the wind-resistant contribution of the rib,and the discrepancy between the two results will be especially large under oblique wind angles with the maximum discrepancy reaching 14.89％.Regarding the standard deviation of the base shear,the results of HFFB tests are larger than those of MPSP tests for the model without ribs,whereas the HFFB results are less than the MPSP results when the b/B is in the range of 1％-4％.When the rib length is noticeably big(e.g.,b/B ≥2％),it is strongly advised to utilize the HFFB test rather than the MPSP test to determine the wind load on high-rise buildings.The calculation methods for the mean base shear modification factor caused by the presence of the vertical ribs were established based on the results of the HFFB.The fitting formula can be used to evaluate the average base shear force of high-rise buildings with different arrangements of vertical ribs.关键词
高层建筑/竖向肋条/风洞试验/测压试验/测力试验/基底剪力Key words
high-rise building/vertical rib/wind tunnel test/pressure measurement test/force balance test/base shear分类
建筑与水利引用本文复制引用
姜咏涵,沈国辉,余世策,姚剑锋..带竖向肋条高层建筑风荷载的测力测压对比[J].建筑结构学报,2024,45(5):115-124,10.基金项目
国家自然科学基金项目(52178511),浙江省公益技术研究计划(LGG21E080009),浙江省教育厅科研项目(Y202250876). （52178511）
