The Dynamic Response Analysis On Oil Dock Pier Of 300000 Tons Under Wave Load

With the development of our country's economy,the transportation of goods through the ports has become one of the most important mode of transportation of import and export in our country.Pier as wharf structure main stress components,the hour has repeatedly against the iMPact of waves,with long,will gradually accumulation of fatigue damage,security so will reduce gradually,shorten the service life of the dock,the wave load is a fundamental issues affect the safety of wharf.The key to the study on the properties of wharf structure is the calculation of wave load analysis and calculation.The current design specification general practice is to get maximum wave load as static load applied calculation,without considering the wave load as a dynamic load effect;at the same time ignore the influence of the foundation.But real bridge pier is standing on the ground,the dock is under wave loading,because of the foundation soil will occur large deformation,will inevitably cause unstable to wharf structure,increase displacement of pier,and reduces the safety of wharf.On large diameter pier wharf,modern scholars pay more attention to in the later,the earth pressure distribution and the bridge of the lateral wave pressure distribution,and for standing alone in the offshore waters,then no landfill earth-rock as support only rely on their own weight of the large diameter cylinder quay,when complex wave factors changes,the wharf structure will produce what kind of influence,the study of this aspect is less.Aiming at the above problems,the use of mathematical theory derivation rules of the wave load and random wave load computation expression,and applied to the simulation numerical simulation under the action of the wave load the dynamic response of a bridge pier wharf structure is analyzed.Through the change of the wave load factor,including wave height,period,incidence Angle and the depth,the rule of the dynamic response of a bridge pier was obtained.By applying two different forms of extreme wave load,understand the distribution of principal stress of the piers and the danger zone.Calculation results show that: the influence of wave height and water depth of bridge pier is increased with the increase of both,but the influence of wave height is more significant;Cycle effect on the pier has certain limitations,namely when the wave period is more than 6.5 s,bridge pier structure is no longer affected by the periodic increase;Angle of incidence of bridge pier wharf minimal i MPact,the wave with about 10 ° angle,has minimal i MPact on bridge pier wharf structure;At the same time,under extreme wave load,bridge has a dangerous area under 10 meters,7.5 meters of bridge pier is the dangerous points.Piers of the maximum principal stress more than concrete tensile strength design,with safe reserve,so the bridge pier is safe.