Cross-sea bridge wind barrier designing method

Abstract

The invention belongs to the technical field of structural engineering, and particularly relates to a cross-sea bridge wind barrier designing method. A bridge floor wind speed field model with a wind barrier and a bridge floor wind speed field model without the wind barrier are established respectively by combining wind tunnel tests and numerical wind tunnels, the simulated height and simulated ventilation ratio of the wind barrier in the bridge floor wind speed field models are changed constantly, the bridge floor equivalent wind speed and the wind speed reduction factor are calculated and compared with the traffic safety wind speed of typical vehicle types, and the height and the ventilation ratio of the wind barrier in safety are the height and the ventilation ratio of the wind barrier needing to be designed. According to the cross-sea bridge wind barrier designing method, when the wind barrier of a cross-sea bridge is designed, conventional factors are taken into consideration, and the influences of multiple wind directions and the influences of multiple bridge types are also proposed to be taken into consideration. Meanwhile, the measure of combining the wind tunnel tests and the numerical wind tunnels is adopted to determine the wind speed fields and obtain the height and the ventilation ratio of the wind barrier, the wind barrier is then designed, and thus the designed wind barrier is more reasonable, more economical, and capable of practically meeting the engineering requirements and powerfully ensuring traffic safety.

Description

technical field [0001] The invention belongs to the technical field of structural engineering, and in particular relates to a design method for a wind barrier of a sea-crossing bridge. Background technique [0002] With the development of science and technology, in order to promote the economic construction of the strait, the cross-sea bridges that can provide convenient transportation corridors have been developed rapidly in my country and around the world. In order to avoid deep water foundations and meet the navigation requirements of large ships, long-span bridges The combination of structures and long-span bridges will become a strong competitor in the implementation of cross-sea projects. However, the special natural wind environment of cross-sea bridges often has an extremely adverse impact on the driving safety of super-long-span bridges. [0003] If the car is affected by the crosswind during driving, safety problems such as sideslip and roll may occur, which will af...

AI Technical Summary

Problems solved by technology

At present, the wind barrier design technology of cross-sea bridges in China mainly considers the influence of conventional factors such as wind speed and wind direction. The comprehensive research on multi-wind direction and multi-bridge types is not deep enough, and it is difficult to achieve practical and economical rationality.

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