Design Tecchnology Research Of Prestressed Concrete Of Clinker Silo Structure

Clinker silo is an important storage workshop of cement plant,which has the advantages of large capacity,small footprint,low operating cost,and less environmental pollution.With the development of the cement industry at home and abroad,the application of large clinker silos with a diameter of more than 50 meters and a capacity of more than 100,000 tons is becoming more and more common.Since the static and dynamic theory of large-diameter clinker silo is not mature enough,the research on the calculation theory and design method under the effect of storage pressure and temperature still needs to be improved.This article takes a large clinker silo as an example,based on the study of a large number of books and materials,mainly does the following work:(1)Compare the calculation methods of silo under the storage pressure and temperature load in the new and old codes,and introduce the calculation method of this part of the new code in detail.Comparing the similarities and differences between the European standard and the Chinese standard silo specifications,and using engineering examples to compare the force and reinforcement of the European standard and the Chinese standard in actual engineering,it is concluded that the European standard’s calculation results of the circumferential and vertical pressure of the silo wall are significantly higher.In Chinese standard,the friction force on the warehouse wall is greater than other results.Because the internal force of the warehouse wall calculated according to the European standard is significantly higher than that of the Chinese standard,the result of the reinforcement calculated based on the strength is also higher than that of the Chinese standard.(2)Combined with engineering examples,the finite element software MIDAS is used to establish a silo model.Considering the influence of the storage pressure and the temperature difference between the inner and outer walls of the silo wall caused by the storage of hightemperature clinker in the silo,the analysis and calculation of the ordinary reinforced concrete silo According to the force condition,it is concluded that the axial internal force and axial bending moment on the silo wall increase from bottom to top under the influence of the storage load;under the influence of temperature load,the axial internal force Larger hoop pressure appears at the top.(3)On the basis of the previous ordinary reinforced concrete silo model,using the relevant theoretical knowledge of unbonded prestressing technology,in the MIDAS model,the working conditions affected by the prestress are added,and the working conditions related to the storage pressure and temperature load Combination,study the mechanical performance of the unbonded prestressed concrete silo,it can be seen that after the pretension is increased,the large hoop tensile force on the silo wall originally affected by the storage pressure has been significantly reduced,and even locally The tensile force indicates that the prestressed reinforced concrete can effectively reduce the tension of the warehouse wall and help reduce the cross section and reinforcement of the warehouse wall.(4)By comparing the cost of ordinary reinforced concrete silo and prestressed concrete silo,the economic analysis of the two is carried out.It is concluded that when the target silo has a larger diameter and a higher height,the use of prestressed reinforced concrete silos can often reduce costs,and the project quality is easier to guarantee.