A test method for outdoor wind-induced snow drift

Abstract

The invention provides a test method for outdoor wind-induced snow drifting, comprising the following steps: (1) placing required model components to a specified angle; (2) arranging at least one weather station at each side of the along-wind direction of a test section, arranging at least one weather station in an open site away from the test section, and placing snow in a vibration device; (3) selecting the pore diameter of a sieve and setting the wind speed of fans and the vibration frequency of the vibration device according to the experiment requirements, and opening a fan device and the vibration device to simulate a snowing environment; (4) after test, measuring snow distribution using a measuring tool; and (5) sorting data, making a data analysis using an independent development program, and drawing a snow distribution contour map. The beneficial effects are as follows: an air refrigeration link is saved, the cost of test operation is low, and test can be repeated multiple times; and the test section is open, there is no limitation for the blocking rate in a wind tunnel, and the upper limit of the scale ratio of the model components is increased.

Description

technical field [0001] The invention relates to the field of wind tunnel test methods, in particular to a test method for outdoor wind-induced snow drift. Background technique [0002] With the gradual increase of extreme weather phenomena around the world, the number of roof structure collapse accidents caused by snow accumulation is also gradually increasing. Long-span and light-weight structures are structural systems sensitive to snow loads, so the value of snow loads is an important consideration in the design process. Therefore, there is an urgent application demand for snow load design methods. [0003] At present, the wind tunnel test is the main experimental technical means for scholars at home and abroad to study snow loads. Kind et al. conducted an in-depth discussion on the requirements for reproducing snow erosion and deposition phenomena in wind tunnel experiments, and focused on the reappearance of the particle motion state during the jump process, from the p...

AI Technical Summary

Problems solved by technology

[0004] However, there are some significant disadvantages in the application of traditional wind tunnel test techniques to study snow loads: First, the wind-induced snow drift experiments in normal temperature wind tunnels can only use snow (fine silica sand, baking soda, etc.) The physical properties of snow and real snow particles are very different; second, the wind tunnel in the climate environment is expensive, and a large amount of power support is required to create a low temperature environment, and the operating cost is too high; The size of the test and the experimental model will be greatly limited by the blocking rate; Fourth, the experimental measurement basically uses steel ruler measuring point drawing at this stage, and the accuracy and technicality are poor

These problems will have a great impact on the results of wind-induced snow drift experiments

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