Structural Design And Dynamic Response Analysis Of Concrete Platform Used In Shallow Sea

At present, China has proven oil and gas reserves, mainly in shallow waters about 1.3 billion tons of reserves, half of which belong to the marginal oil fields. How to develop this part of the resources effectively in promoting China's economic development is of great significance. This thesis in consideration with requirements of function, construction work, platform security, ice load resistance etc. of drilling platform, conduct overall planning and vision on the platform type. Putting forward innovative box and bucket foundation, piles concrete platform structures in shallow water. This kind of structure can complete the drilling process, oil production, workover, ships calling and other functions, solve production problems, save investment, environmental protection and can be an innovation in technology. This kind of structure is the better way to solve these problems.Based on the case of bucket foundation structure and piled beam-slab wharf design theory, to establish comparatively perfect design theory for bucket foundation structure and piled beam-slab platform.Using SAP2000 finite element software, chose a reasonable mechanical model of foundation to establish box and bucket or pile foundation concrete platform for 3D finite element model. Aiming at research and design for oil drilling concrete platform construction in the southern beach area in Dagang Tianjin. Using the finite element method to compare different box tube structural forms, analyzing box tube structure scale effect on displacement and internal forces of the platform structure, and select the optimal structure form and structure measure.Platform structure bears the load of ice-induced vibration and derrick load vibration. Currently, the equivalent static method can satisfy the derrick platform structure base stage design requirements only, but doesn't give a deep study on vibration response on the platform structure. Structural dynamic response analysis can more effectively reduce or avoid oil production platform structure dynamic failure cases or ice load resulting to safety accidents. Therefore, developing research on the dynamic response of the platform structure for structure construction design and oil production safety is of great significance. This paper presents a shallow simplified method about box and bucket foundation and pile foundation concrete platform for structural dynamic analysis. Fully account for ice load and derrick load on a structure. Analyzing and comparing static, dynamic response on a structure under different factor and conditions to obtain variation of time to the response of platform structure, realize calculation steady and transient response of platform structure under periodic continuous load and impact load. Then obtain control factors and conditions of platform.