Study On Pseudo-static Test And Strength Calculation Of Prefabricated Steel Reinforced Concrete Beams

Nowadays,as people's requirements for living standard continue to increase,various high-rise buildings and a great diversity forms of buildings can be seen everywhere.Meanwhile various industry guidelines for the construction industry have also been reformed.At the same time,the government has vigorously promoted innovative and prefabricated buildings in recent years.Building greening and energy conservation and environmental protection have become the development direction of China's construction industry gradually.The Prefabricated Steel Reinforced Concrete(PSRC)structure combines the advantages of prefabricated concrete structures and steel reinforced concrete structures,and can be widely used in building structures.Conducting in-depth research on PSRC beams will accelerate the standardization of construction and improve building technology which is of great practical significance to the engineering quality.So far,no domestic and overseas theoretical analysis of PSRC structures under low cyclic loading,especially its bearing capacity,has been reported.Therefore,the low-cycle reversed test of 17 prefabricated steel reinforced concrete beams is carried out in this paper.First of all,the mechanics characteristic,failure modes and influencing factors of bearing capacity of the 17 PSRC beams under various design parameters are analyzed and researched in detail.The second,the stress state of longitudinal bars,steel bars and stirrups are introduced carefully.In addition,this paper elaborates and summarizes the seismic performance of PSRC beams,such as ductility,strength attenuation,stiffness degradation,energy consumption,etc.,under the influence of different design parameters.In the latter part of this paper,on the basis of the experimental results and the existing domestic research theories,two types of the calculation methods for the flexural bearing capacity of the PSRC beams are given.At the same time,the existing specifications of the shear bearing capacity calculation in the standard and literature are compared and the applicability of the formulas to the PSRC beams are analyzed.Finally,the regression equation of the shear bearing capacity of the PSRC beam's oblique section are accelerated by Origin software,and the rationality of the given formula is verified through comparative analysis.