A sea-crossing bridge dynamic response calculation method based on wind wave load combination

Abstract

The invention discloses a sea-crossing bridge dynamic response calculation method based on wind wave load combination. The sea-crossing bridge dynamic response calculation method comprises the following steps that 1, Establishing the coupling relationship between wind and wave and wind flow respectively; Step 2: Determining the wind, wave and flow parameters of different return periods, and obtainWind-wave-flow combination in a certain return period according to the coupling relationship of step 1.; Step 3: Determining the wind load point coordinates to generate a random wind field to obtainthe wind load; Step 4: Determining the wave flow point coordinates to generate a random wave flow field, and obtaining the wave load and the water flow load; 5: According to the wind-wave-flow combination obtained in step 2 and the load obtained in steps 3 and 4, obtaining the wind- wave-lfow load combination T; step 6: bringing the combination obtained in step 5 into the bridge across the sea toobtain dynamic response of the bridge. the invention fully considers the coupling relationship between the wind and the waves, and is more suitable for the actual situation, and is applied to the engineering design to reduce the engineering cost.

Description

technical field [0001] The invention relates to a calculation method for the response of a sea-crossing bridge, in particular to a calculation method for the dynamic response of a sea-crossing bridge based on the combination of wind, wave and current loads. Background technique [0002] At present, more and more cross-sea bridges are being constructed, such as the completed Hong Kong-Zhuhai-Macao Bridge, Zhoushan Liandao Bridge, Hangzhou Bay Bridge, the Pingtan Strait Bridge, Qiongzhou Strait Bridge, etc. under construction or planning; The harsh marine environment is often affected by strong winds, rapids, and huge waves, which brings huge challenges to the design, construction, and operation of bridges. It is almost impossible for the wind, wave and current to occur at the same time, and the traditional load combination method will overestimate the environmental load and increase the project cost; generally, most of the sea-crossing bridges are long-span bridges such as ca...

AI Technical Summary

Problems solved by technology

[0002] At present, more and more cross-sea bridges are being constructed, such as the completed Hong Kong-Zhuhai-Macao Bridge, Zhoushan Liandao Bridge, Hangzhou Bay Bridge, the Pingtan Strait Bridge, Qiongzhou Strait Bridge, etc. under construction or planning; The harsh marine environment is often affected by strong winds, rapids, and huge waves, which brings huge challenges to the design, construction, and operation of bridges. It is almost impossible for the wind, wave and current to occur at the same time, and the traditional load combination method will overestimate the environmental load and increase the project cost; generally, most of the sea-crossing bridges are long-span bridges such as cable-stayed bridges and suspension bridges, and their overall stiffness is small. The load affects the deformation greatly, and it is very important to determine the combination of wind-wave-current load reasonably

[0003] The combination method of wind-wave-current load mainly includes two aspects: the multiple coupling method of wind-wave-current parameters and the numerical calculation method of random wind-wave-current load, for example, the patent publication number is CN107657117A "a road-rail dual-purpose bridge car-bridge-wind wave "Flow coupled vibration analysis method" discloses a bridge-vehicle-wind-wave-flow coupled vibration analysis method, but this method does not consider the correlation between wind and waves, resulting in the ultimate load effect of the structure deviates from the actual situation

Images