| Tornado is one of China's 10 major natural disasters, Low-rise housing anti-tornado is a reality and urgent to be resolved problem that happen in China's JiangSu, AnHui and other places. This article according to the actual measurement on the low-rise housing tornadoes at home and abroad, post-disaster research, model wind tunnel tests and theoretical aspects of the research, applying vortex movement theory, established tornado wind flow model that considered translational wind effectiveness. Basing on quasi-steady theory, deeply reached the distribution of tornado flow field that considered translational wind, also discussed characteristics of the effect of wind field on low-rise buildings, better revealed the distribution rule of the tornado airflow speed and pressure along the plane, indicated that each horizontal left whirlpool pressure of tornado as decreasing, increasing, decreasing change along the radial, At the same time analyzed the construction of wind load, discussed the building wind pressure, wind suction, practical calculation of torsion. After considering translational wind gradient, negative pressure in the front of tornado increased and this negative pressure increased more obviously when the height of tornado became lower. Therefore, the lower-rise buildings suffered the impact of wind suction greater than higher ones. Based on this, combined with the field survey of tornado disaster-stricken areas of housing damage , analyzed and summed up the main factors that impacted low-rise housing wind-resistant properties. Putted forward multi-level fortification standards and wind-resistant design methods based on different safety requirements that applied to low-rise housing's wind-resistant design in more tornadoes areas, and concept design and conformation measures of Low-rise housing anti-tornado.The research results of this paper can provide reference for the areas concerned to formulate t corresponding wind-resistant building design standards.
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