The Resistance Analysis Of Low-rise Buildings In Strong Wind

The typhoon is one of the most serious natural disasters in the world, which is of two main typical characteristics:suddenness and great destructive power. Bringing with strong wind, heavy rain and storm surge, it causes great damage to society. China is one of the areas that suffer from typhoon seriously in the world. The typhoons that influence our country are mainly generated in the northwestern Pacific. A majority of typhoons are generated in the Pacific Northwest, only a small number happen in the South China Sea. The southeast coastal cities of China such as Taiwan, Guangdong, Hainan, and Fujian are influenced seriously by typhoon, following by Guangxi, Zhejiang and Shanghai, Jiangsu, Shandong and Liaoning.With the rapid development of China’s economy, the majority of rural residents have made significant changes in building. Frame structure, brick and concrete structure are more and more widely used. However the traditional brick and earth structure, wooden houses abound still exist. This class houses are age-old. What’s more, problems on the design and construction make it have low wind resistance. Therefore it is very important for typhoon risk analysis of such areas. The risk analysis of typhoon reflects the degree of typhoon damage to society, it depends on the typhoon risk analysis of the area, vulnerability of structures and disaster Losses. In order to analysis the wind resistance of Low-rise buildings in strong wind, this article takes a building of masonry structure in Xiamen for example.And this article is specified in the following aspects:Firstly, analysis of typhoon risk in Xiamen. By applying typhoon wind field model and Monte Carlo random sampling method to simulate a number of typhoons in 1000 years in Xiamen. Good extreme wind speed sequence of typhoon will be got. Then different extreme value distribution functions are used to calculate the extreme wind speed in different return period. On one hand the Comparison between calculation results and specification values is needed, on the other hand some suggestions will be given to improve specification values.Secondly, study on wind resistance of the whole structure capability in strong wind. Based on the finite element model of a masonry structure created in ANSYS, and set the maximum story drift and the top displacement angle as performance parameters and create five kinds of the structure damage states are classified. Then typical structural responses in different wind speeds are analyzed by transient dynamic analysis method. At last the structure vulnerabilities are estimated.Finally, wind resistance analysis of double pitch roof. As wind pressure on the surface of structure is no uniform distribution, it is usually very high at the concern or in the place of dimensions change. This article adopts double pitch roof as a representative to research partial wind resistance. The main structural members such as timber purlin and rafter will have different reactions in different slopes of roof. Try to figure out the structural member that is sensitive to local wind pressure of region. And confirm the optimum slope range for resisting strong wind.