低矮建筑围护结构风荷载标准值的规范对比

发布时间：2018-07-04 14:28

本文选题：低矮建筑 + 围护结构　；参考：《北京交通大学》2017年硕士论文

【摘要】：风灾害对建筑物的损坏非常严重,尤其是对低矮建筑围护结构的损坏更为严重,所以研究低矮房屋围护结构的抗风设计十分重要,围护结构抗风设计的关键是准确确定围护结构设计风荷载。为了准确的进行低矮房屋围护结构的抗风设计,有必要参考国外规范和试验数据。因此本文在介绍了低矮房屋围护结构风荷载设计理论的基础上,从以下几个方面进行了研究:(1)提出了建议低矮房屋围护结构风荷载设计采用的标准公式,以标准公式为基础,对比了中国、美国和日本三国规范风荷载计算公式中的系数,包括风向折减系数、面积折减系数、风压系数极值。其中重点对比了三国规范对风压系数极值的规定,并分析了各国规范之间发生差异的原因,指出了我国荷载规范存在的问题,提出了改进和完善我国荷载规范围护构件风荷载规定的具体建议。(2)基于UWO(The University of Western Ontario)数据库的风洞试验数据分析了低矮双坡屋面房屋表面平均风压系数、脉动风压系数以及极值风压系数的分布特征,并研究了建筑物屋面坡度对低矮双坡屋面房屋风压系数分布的影响。(3)把由数据库得到的低矮双坡屋面房屋全风向风压系数极值和中美日规范中规定的低矮双坡屋面围护结构风压系数极值做了对比,验证了中美日三国规范风压系数极值取值的合理性,并指出了我国规范的不足,提出了修改建议。
[Abstract]:The damage of the wind disaster to the building is very serious, especially the damage to the low building enclosure structure is more serious, so it is very important to study the wind resistance design of the low building enclosure structure. The key to the wind resistance design of the enclosure is to determine the wind load of the enclosure structure accurately. In order to accurately carry out the wind resistance of the low house enclosure structure. It is necessary to refer to the foreign norms and test data. Therefore, based on the introduction of the theory of wind load design for low housing enclosure structure, this paper studies the following aspects: (1) a standard formula is proposed for the design of wind load in low housing enclosure structure, based on the standard formula, compared with China, the United States and Japan. The coefficient in the formula of wind load calculation in the Three Kingdoms, including wind direction reduction coefficient, area reduction coefficient, and the extreme value of wind pressure coefficient, is used to compare the rules of the Three Kingdoms to the extreme value of the wind pressure coefficient, and analyze the reasons for the difference between the norms of various countries, point out the existing problems of the load standard in our country, and put forward the improvement and perfection of me. The specific suggestions on the regulation of wind load on retaining members are regulated by the state load. (2) based on the wind tunnel test data of the UWO (The University of Western Ontario) database, the average wind pressure coefficient, the fluctuating wind pressure coefficient and the distribution characteristics of the extreme pressure coefficient are analyzed, and the slope of the building roof to low double slope is studied. The influence of wind pressure coefficient distribution of roofing houses. (3) comparing the extreme value of wind pressure coefficient of low double slope roofing house with low double slope roof and the extreme pressure coefficient of low double slope roof enclosure structure stipulated in China and America and Japan standard, the rationality of the extreme value of the standard wind pressure system in the three countries of China and the United States and Japan is verified, and the regulations of our country are pointed out. The deficiency of fan was put forward, and the suggestion of revision was put forward.
【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU312.1

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