Study On The Anti-Vibration Performance Of New Metal Tube Concrete Offshore Platform For Earthquake And Ice Bracing

The winter weather in the Bohai Bay is terrible,and the sea ice is more serious.The complex marine environment has caused serious corrosion damage to the offshore platform structure,greatly reducing the service life and safety of the platform structure.At the same time,there will be earthquake disasters in the Bohai Bay waters,which will seriously affect the safety and stability of structural structures such as offshore platforms.It will easily cause structural vibration problems of offshore platform structures under the effects of ice disasters and earthquake disasters,seriously affecting the operation of platform structures and staff.Personal safety issues and bring unnecessary economic losses.In order to improve the durability of the offshore platform and reduce the vibration caused by earthquake and ice shock,an aluminum alloy pipe concrete composite structure offshore platform and a stainless steel pipe concrete offshore platform are proposed as a new metal pipe concrete composite structure offshore platform,and a new metal pipe concrete combination is analyzed.Analysis of structural anti-vibration performance of structural offshore platforms under earthquake and ice shock.The main research work is as follows1.In this paper,the JZ20-2 north high-point jacket-type offshore platform of Bohai Bay is taken as the research object,aiming at improving the durability and anti-vibration performance of the offshore platform structure.A new type of metal tube concrete for aluminum alloy tube concrete and stainless steel tube concrete is proposed.The combined structure of the offshore platform compares the maximum displacement and maximum acceleration variation at four different nodes of the platform structure to analyze the damping effect of the new metal pipe concrete combined offshore platform.2.Using the finite element software ABAQUS to establish a new type of metal pipe concrete axial compression test piece model,carry out finite element simulation analysis,and simultaneously perform axial compression short column on two new metal pipe concrete offshore platform pipe legs of aluminum alloy pipe concrete and stainless steel pipe concrete.Test and study the bearing capacity performance and failure mode of specimens of different materials under axial compression test.The test results and finite element analysis results were compared and analyzed to verify the correctness of the finite element analysis.3.The ice situation in the Bohai Bay is serious.The ANSYS finite element software model is used to simulate the three ice-ice time schedules of push1,push2 and push3 on the aluminum alloy pipe concrete offshore platform,the stainless steel pipe concrete offshore platform and the original steel platform structure.Comparing the anti-ice vibration analysis,the vibration damping effect of the stainless steel tube concrete offshore platform structure is the best.4.El-Centro wave,Taft wave and Tianjin wave are used to analyze the seismic performance of three kinds of offshore platform structures under earthquake(with seismic acceleration of 600 gal),and analyze their safety reserves under the ultra-rajor earthquake.5.Through comprehensive analysis and analysis of the aluminum alloy tube concrete offshore platform,stainless steel tube concrete offshore platform,the original steel offshore platform under the ice shock load and seismic shock reduction effect,the aluminum alloy tube concrete combined marine platform,stainless steel tube The concrete combined offshore platform can effectively achieve the anti-vibration effect,but especially the stainless steel pipe concrete offshore platform has the best anti-vibration effect.