延庆What are the factors for the structural stability of dry gas holder?

① Through the analysis of the dynamic characteristics of the structure, it is found that the natural vibration period of the structure extends with the rise of the piston, from 0.438s at the low position to 0.801s at the high position;
② For the top structure of dry gas tank, the influence of main beam section on the top bearing capacity of the tank is greater than that of grid density. The influence of radial beam section on the top bearing capacity of the tank is greater than that of circumferential beam section. When it is necessary to increase the top bearing capacity of the tank, the effect of increasing the radial beam section is good and the most economic;
③ The initial defect of the top of the dry gas holder reduces the ultimate bearing capacity of the top and the rigidity of the top, and changes the instability type of the structure into extreme point instability, but does not change the instability form of the structure. For the defect factors of different sizes, the ultimate bearing capacity of the top of the tank increases with the increase of the defect factor. When the defect factor is 1/1000, the ultimate bearing capacity of the relatively perfect structure decreases by 12.5%;
④ For the structure of the dry gas holder, the working internal pressure of the gas holder has a certain beneficial effect on the anti-wind performance of the gas holder; The circumferential T-shaped stiffening rib of the gas tank is used to ensure the local stability of the tank body, the role of the wind ring is to ensure the overall stability of the structure, and the role of the column in the wind resistance performance of the structure is not obvious;
⑤ In the arrangement scheme of circumferential stiffening rib of gas tank, the section of TM 74 with a spacing of 0.9m is adopted under the condition that the steel consumption is roughly the same × one hundred × six × The small section and small spacing scheme of 9 has better wind resistance than the existing design scheme.