檐沟对低矮房屋屋面风荷载的影响  

EFFECT OF EAVES GUTTER ON WIND LOADINGS ON LOW-RISE BUILDINGS’ ROOFS

作　　者：黄鹏[1] 陶玲[1] 全涌[1] 顾明[1] 

机构地区：[1]同济大学土木工程防灾国家重点实验室,上海200092

出　　处：《工程力学》2013年第1期248-254,共7页Engineering Mechanics

基　　金：国家自然科学基金项目(51178352;90715040)

摘　　要：为了研究细部构造(檐沟)对低矮房屋屋面风荷载的影响,在同济大学TJ-2风洞试验室对无屋脊硬山屋面、有屋脊硬山屋面、无屋脊出山屋面及有屋脊出山屋面这4种屋面分别做了有檐沟、无檐沟的刚性模型测压试验。试验结果表明:檐沟的存在对于减小屋面各区域的用于主体结构设计的平均风压和用于围护结构设计的极值风压大都有较好的作用,尤其是最不利的极值负风压,其减小的幅度最大达到30%。屋脊、出山和檐沟的共同存在会使屋面各区域的平均风压和极值风压都有不同程度的减小,特别是屋面负压敏感区域的极值负压得到了很大的缓和,减小幅度最大高达60%,从而使屋面各区域的极值负压趋于均匀,且随着它们高度的增加,这种效果更加明显,这对于房屋的抗风设计非常有利。In order to study the effect of configuration details of the roof eaves gutter on the wind loadings on roofs of low-rise buildings, the rigid model pressure measurement tests of typical low-rise buildings of four types of roofs with and without eaves gutter were conducted in TJ-2 wind tunnel laboratory, which are roofs with flush gable wall and with／without ridge respectively, and roofs with protruding gable wall and with／without ridge respectively. The results show that the existence of eaves gutter is effective in decreasing the mean and worst peak wind pressure of each region, which are used for main wind force resisting system and components and cladding design, respectively, in particular to the worst peak negative pressure, 30 percent of which is reduced at most. The mean and peak negative pressure of each region of the roofs are alleviated to varied degrees when the building is equipped with ridge, protruding gable wall and eaves gutter, the loads of the zones where are negative seriously are mitigated largely, up to 60 percent of which is relieved at most, thus the loads of each region are getting uniform. Moreover, with the increasing of whose heights, this effect is more evident, which is quite favorable for building wind resistance.

关 键 词：风工程 低矮房屋 风洞试验 檐沟 平均风压 极值负压 

分 类 号：TU312[建筑科学—结构工程]