The Application Research Of Large Prestressed Concrete Truss Transfer Structure

Now the city public buildings have tended to use the function of diversification,high-rise public buildings need to combine a variety of structural types to meet the diversification of its use of functions,high-rise building conversion layer structure successfully solved the upper and lower structure of the building connection and excessive The problem.As the upper part of the conversion layer structure more,so the conversion layer is often subject to a large vertical load,so that the vertical structure of the vertical structure of the larger part of the conversion layer structure due to the requirements of the building function is often used larger interval Axis,so the span of the conversion layer is generally large;large-span conversion layer structure under the action of the larger vertical load will produce a lot of deflection and cracks,affecting the normal use of building structure.For the above reasons,prestressed concrete trusses are well suited for use in the conversion layer structure of multifunctional buildings to solve the above problems.In this paper,the practical construction of Guidong Hospital outpatient building building as an example,the prestressed concrete truss conversion layer structure feasibility analysis,completed the following work:This paper introduces the development and research status of reinforced concrete truss structure at home and abroad,and analyzes the development trend of prestressed concrete truss transition layer structure.The whole structure of the outpatient building building in Guidong Hospital was calculated and analyzed by SATWE program.The influence of the structure of concrete truss transition layer on the whole structure was discussed by analyzing the internal force and dynamic performance of the whole structure.Aiming at the adverse effect of the transforming layer structure on the whole structure,the method of adjusting the structural arrangement of the structural structure is discussed,and the design criteria of the concrete truss transition layer structure are summarized.The internal force and the force characteristics of the truss structure are analyzed and compared with the calculation results of different types of trusses.The internal force transmission path of the truss is analyzed,and the stress characteristics of the reinforced concrete truss bar are summarized.Based on the calculation and analysis of the converted truss nodes,the calculation method of the truss plus axle and the structural requirements of the reinforcement of the truss joints are introduced.Based on the calculation of the prestressing calculation of the truss chords in the outpatient building building of Guidong Hospital,the calculation method of prestress loss is described,and the measures to avoid the excessive prestress loss are summarized.The construction technology and operation points of the concrete prestressed structure are discussed And summary.It is proved that the prestressed concrete truss can support the upper floors of ten or even tens of layers and is suitable for large span structures.