| In order to meet the demand for cement In Construction, the scale of cement plants isexpanding. The clinker silo (warehouse), as one of the important structures of a cementplant/factory/mill, its single database has increased up to million tons compared with thehundred and thousand tons in the past. Diameter of a warehouse is from dozens of meters upto hundreds of meters today. The reinforced concrete structure of the clinker warehouse roofhas mainly turned to Long-span space grid structure. Furthermore, some even use thecombination of few warehouses. Due to the increase of the storage and the diameter, theequipment load also increased to one hundred tons above. Every day the delivery of thelibrary of clinker produces action effects on the roof, making the safety problems of theconveyor roof more prominent. In recent years the conveyor engineering accident occuroccasionally, and in the current, the research in this aspect is not much, so this paperdiscussing the dynamic response on the clinker silo combined with two actual engineeringexamples, and providing some engineering anti-earthquake design countermeasures.The paper is based on the random vibration theory, by the STADS modeling the load, andthen put the model into SAP2000to analysis the model by the method of frequency domainanalysis. In this paper, we consider the load as a random combination of the harmonic loadcaused by the equipment, clinker load and the horizontal load and vertical load caused by theclinker zipper machine. In SAP2000, analyzing the structural response at the N frequency bythe steady-state analysis method and also using the relationship between response of therandom load and the frequency to analyze the peak value of the corresponding index of thestructure, consequently, achieving the reasonable design.Through the above research, mainly achieving the following results:（1）Analyzing the dynamic response of the clinker silo net shell by the random vibrationtheory and the pseudo-excitation method.（2）Using the modeling and calculating function in STADS software, will frequency andrandom load contact into analysis the structure by the steady-state analysis method inSAP2000.（3）This paper adopts two models: the first model, considering only clinker load and thehorizontal load and vertical load caused by the clinker zipper machine, the second model,considering all the above loads and also the other equipment load. Through contrast analysisensuring equipments working well and the reliability of the structure under the dynamic loads.（4）Through the two conveyor models analysis drawing the conclusion：In the first model,the value of the member axial force in the top of the structures and near the bearing placestructures are about1.5times and1.2times respectively than that in the middle of structures.While in the second model, the value of the member axial force in the top of the structuresand near the bearing place structures are about2.1times and1.3times respectively than that inthe middle of structures. （5）By the data statistics analyzing, both the grid components that is near the device and themembers in the first and the second grid that near the bearing should be strengthened, whilestructures of the middle part can be properly decrease.The above are vibration examples encountered in engineering. Especially in installationand equipment vibration when the machine starts may lead some uncomfortable factors tooperators, thus considering each component safety problems in the dynamic analysis in orderto make some beneficial conclusions and give some beneficial advices to design. |
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