Finite element analysis of the additional stress in the large oil tank foundation;

In the light of the construction experience and welding philosophy of large oil tanks, introduced here in the paper are the mechanism of steel plate deformation.

To improve safety performance of large oil storage tanks in-service,it is supposed that fatigue failures mainly result from the stress concentration of shell-to-bottom fillet welds.

However, the design and construction technology of large oil storage tank is quite immature, it is necessary to improve the design and construction technologyof large oil storage tank.

In order to ensure the safety of large oil storage tank, further research to the static strength and seismic response of tank are carried on.

At present,the petroleum requirement of the market is larger and larger,and the number of the ribbed vault storages which are expansile or newly-built is increasing,then the volume of the single tank is to be built lager and larger,and the large-scale petroleum storage tank is a direction.

New modeling method for finite element analysis of large oil storage tanks;

For accurately obtaining the stress distributions of large oil storage tanks shell,an analytical method for solving the long-short cylindrical shells was proposed.

To reinforce the safety and reliability of large oil storage tanks, structural analysis under statically-strength and aseismatic research under dynamically-loading were done.