A weatherproof design method of a long-span hyperbolic roof structure under combined action of rain and wind

Abstract

The invention discloses a weatherproof design method of a large-span hyperbolic roof structure under the combined action of rain and wind, which relates to the technical field of a roof structure in the construction industry. The method includes: through a numerical simulation method, selecting four kinds of hyperbolic roofs with typical projection shapes to study the influence of wind and rain onthe performance of an Euler-Euler model, the average pressure distribution law of the hyperbolic roof surface under different wind angles, comparing with the existing wind-resistant experimental data, and finding a series of complex actions occur on the roof surface under the combined action of wind and rain; on this basis, analyzing the distribution of surface pressure of hyperbolic roof with different wind direction, wind speed, rainfall intensity and other important parameters, and obtaining the most unfavorable distribution; based on this, carrying out comparative analysis of the averagepressure coefficients of each measuring point of the hyperbolic roof arrangement; based on the above analysis and in accordance with the code, providing the reference values of the average pressure coefficients of each hyperbolic roof surface with height of 20-40m. The weatherproof design method of the large-span hyperbolic roof provided by the invention provides the corresponding theoretical basis and engineering reference for the weatherproof design of the similar shape structure.

Description

technical field [0001] The invention relates to the technical field of roof structures in the construction industry, in particular to a wind and rain resistance design method for a large-span hyperbolic roof structure under the combined action of wind and rain. Background technique [0002] At present, the long-span roof structure has become one of the mainstream forms of building structures. The long-span roof structure has light weight, high flexibility, strong geometric nonlinearity, and is very sensitive to wind load. It is worth noting that when strong winds come, they are often accompanied by heavy rainfall. Under the action of wind load, raindrops will have a greater impact force on the structure, which intensifies the load on the structure; at the same time, the accumulation of rainwater during the rainfall will cause the building to face the wind. The moisture on the surface will affect the safety and durability requirements of the building structure. [0003] Acc...

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Problems solved by technology

[0004] At present, the domestic research is on the wind resistance design of long-span roof structures, and the research on large-span hyperbolic roof structures under the combined effects of wind and rain is very scarce, resulting in unclear pressure distribution laws of long-span roof structures under the combined effects of wind and rain , the important parameters of anti-wind and rain design are not perfect, and the current code has not given clear regulations on the surface pressure coefficient of long-span roofs under the combined effects of wind and rain, which will bring inconvenience to the design of long-span roofs under the combined effects of wind and rain, and will affect the structure of the future. safety hazards

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