Tornado testing device for building wind engineering

Abstract

The invention provides a tornado testing device for building wind engineering. The tornado testing device can accurately simulate a wind field of a tornado and the wind load effect of the tornado on a building. The tornado testing device comprises stand columns and a motor, wherein longitudinal beams are arranged on the tops of the stand columns, the longitudinal beams are connected with transverse beams, rolling wheels are arranged on the longitudinal beams and move along the longitudinal beams, the rolling wheels are connected with supporting beams, the supporting beams are connected with a vortex generator, the motor drives driving wheels to rotate, driven wheels matched with the driving wheels are arranged on the supporting beams, a platform is arranged below the vortex generator, and the platform is arranged on a lifting device. According to the tornado testing device for the building wind engineering, the shape of vortex wind generated by the vortex generator is similar to the shape of the tornado, the wind speed and the wind direction of the vortex wind can be adjusted, the vertical distance between the vortex wind and a house model can be adjusted, the horizontal movement speed of the vortex wind can also be adjusted, and therefore the wind field of the tornados in different states and the effect of the wind load of the tornados on the building can be fully simulated.

Description

[0001] technical field [0002] The invention relates to a tornado simulation test device, in particular to a tornado test device used in construction wind engineering. Background technique [0003] Tornado disasters are natural disasters that occur frequently in the active monsoon areas in eastern my country. When a tornado passes by, extremely high wind speed and sudden air pressure drop act together on buildings, often causing a large number of houses to collapse and casualties. A tornado is a strong wind vortex with high-speed rotation produced by the strong convective movement of air in extremely unstable weather. The formation mechanism of the tornado and the structure of the wind field are complex, the wind speed and pressure drop are very large, and the moving speed itself has a great influence on the wind field, so there is no mature basis for the characteristics of the wind field of the tornado. The wind-resistant design of buildings under the action is very nece...

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Problems solved by technology

[0004] At present, the DC low-speed wind tunnel has been developed and widely used in the wind load research of buildings in the atmospheric boundary layer wind environment. However, the tornado simulation test cannot be carried out in the existing DC wind tunnel, and there are a few researchers at home and abroad. A simple vortex generating device is designed to simulate a tornado, but the device has a single function and cannot simulate the flow field characteristics of a complex tornado

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