防灾减灾工程学报2017，Vol.37Issue(3)：487-495,9.DOI:10.13409/j.cnki.jdpme.2017.03.023
低矮房屋体形系数的修正及风荷载计算方法研究
Study on Pressure Coefficient and Wind Load Calculation Method for Low-rise Buildings
摘要
Abstract
Strong wind often causes severe damage to a mass of buildings especially the widely existing low-rise buildings.Therefore it is necessary to make clear the distribution law of wind pressures on such kind of buildings and accordingly to find the corresponding wind-resisting means.Numerical simulations were conducted on 60 gable roof low-rise buildings with 10 pitches,3 height-depth ratios and 3 width-depth ratios.According to the test results and the foreign load codes,the surface of the buildings was divided and the most negative region shape coefficients were given.The effects of pitches,height-depth ratios and width-depth ratios on region shape coefficients were analyzed,and the region shape coefficients were fitted with pitches,height-depth ratios and width-depth ratios by least square method.The computed values using the fitted formulas were compared with load codes of different countries.So the reliability of the fitted formulas was verified.Then the region shape coefficient values,wind-resistance design method and simplification formula,which were used to calculate wind loads of main wind-force resisting system in Chinese load code for the design of buildings were suggested in accordance with the test values and ASCE7-10 load codes.关键词
低矮房屋/CFD数值模拟/体型系数/风荷载规范/抗风设计Key words
low-rise building/CFD numerical simulation/shape coefficient/wind load code/wind resistant design分类
建筑与水利引用本文复制引用
李牧羽,李钢,甘石..低矮房屋体形系数的修正及风荷载计算方法研究[J].防灾减灾工程学报,2017,37(3):487-495,9.基金项目
国家“十二五”科技支撑计划项目(2014BAL05B03)资助 （2014BAL05B03）
