Dynamic response analysis of vertical hybrid structure-equipment system of petrochemical production plant

The seismic design of the structure-equipment system of petrochemical production plants is not yet guided by special specifications, forming a phenomenon of engineering ahead of time and theory lagging behind, which needs to be studied in depth. In view of the special characteristics and complexity of the seismic safety of the structure-equipment system of such devices, the acceleration response, displacement response, stress response and structural lateral deformation law are analyzed based on the modeling of the petrochemical production plant engineering example, considering the interaction of the structure-equipment system of the device. The results of the study show that the torsional effect on the whole device is obvious, and the calculation model considering the structure-equipment interaction truly accounts for the stiffness contribution of the petrochemical equipment to the overall structure and reflects more equipment-dominated vibration characteristics in the higher-order vibration patterns; When the characteristic period of the input seismic wave is close to that of the upper steel structure, the acceleration response of the upper steel structure will reach extreme values and the displacement response will be severely amplified; Under the action of different seismic waves, the maximum inter-story displacements all occurred in the 2nd and 3rd floors with higher floor heights and the 5th floor where equipment was installed, and the lower concrete structure showed shear-type deformation characteristics; The equipment and structure connection is the location of the sudden change of stiffness and mass in the structural system, and the peak stress reaches 56.1 MPa. Special attention should be paid to the design and construction of the transformation layer in the design to ensure the safety of the transformation layer of the hybrid structure and the equipment support.