Seismic Performance Experiments And Theoretical Analysis Of Prefabricated Steel Reinforced Concrete Beams

Prefabricated technology simplifies the construction process and construction difficulty of traditional steel reinforced concrete structure.Steel embedded in the prefabricated concrete structure can solve the poor integrity and seismic performance of traditional prefabricated concrete structure.Based on the advantages of prefabricated concrete structure and steel reinforced concrete structure,12 PSRC beams with v-shaped section webs were designed and manufactured.In order to study the seismic performance and stress analysis of 12 PSRC beams with v-shaped section webs,low cyclic loading tests were carried out on 11 beam specimens and monotonic loading tests were carried out on the other beam specimens.According to the experimental phenomena and data,the hysteretic loop,skeleton curve,ductility performance,stiffness degradation and energy dissipation capacity of PSRC beams with different design parameters were studied.The research shows that PSRC beams has good seismic performance.When shear-span ratio is three,the seismic performance is better.Based on the code for design of composite structures and the code for technical specification of steel-reinforced concrete structures,the shear capacity of PSRC beams with inclined sections was analyzed.Through comparative analysis,it can be seen that the shear bearing capacity formula in the code for design of composite structures is more applicable to the calculation of shear bearing capacity of PSRC beams except for the internal honeycomb steel specimens.On the basis of code for design of composite structures,the formulas for calculating shear capacity of PSRC beams with solid web steel and PSRC beams with honeycomb under low cyclic loading were derived respectively,which were proved to be reasonable and applicable by tests.