Experimental Research On Seismic Behavior Of Grouted And Dowelled Jointed Of Precast Monolithic Reinforced Concrete Column

Precast monolithic reinforced concrete structure as a high degree of industrialization,fast construction speed, good economic benefit, environmental benefit and obviousadvantages of architectural form, has become the future development direction of theconstruction industry, and the precast monolithic reinforced concrete structure technologyis the key node connection. Column as a frame structure and frame shear structure mainanti-lateral force components of the system, precast monolithic reinforced concretestructure on experimental research of seismic behavior of column connected isparticularly important. Column connection in the form of dry and wet connectconnection usually has two kinds of forms, this paper use the wet connection in groutedand dowelled jointed connection form. The use of high-strength spiral stirrup confinedconcrete column, thereby improving the seismic behavior of the columns, at the sametime, the steel plate hoops to node two binding reinforcement measures，increasedgrouting anchor bars and the longitudinal bars of confinement effects and node integrity,improve grouted and dowelled jointed connection column seismic behavior.Design of2full-scale ordinary spiral hoops long column,2full-scale high-strengthspiral grouting anchorage reinforcing connecting column and a2spiral hoops slurryanchor reinforcing connection short column, and low cyclic reversed load test.Observation and analysis of specimens under low cyclic loading, the cracking、yield、failure process、steel plate hoop constraint concrete core and node failure pattern. Studyof grouted and dowelled jointed connection column under low cyclic loading, the failure pattern and hysteresis curves and skeleton curves and displacement ductility and stiffnessdegradation and energy dissipation etc. The results of the experiment show, usinghigh-strength spiral stirrup forms of grouted and dowelled jointed connection column hasgood seismic performance. In grouting anchor bars combination of surface at assemblyshould be stirrups arrangement. The length of the column plate hoop stress and failureform of change. Analysis of the steel plate hoop on to the connection zone of concreteconfinement effect, slurry anchor reinforcing and joint stress, deduced the node bearingcapacity calculation formula, put forward the precast monolithic reinforced concretestructure grouted and dowelled jointed connection column design principles, connectionsand some design suggestion. Combined with the experimental hysteretic curve andskeleton curve, puts forward grouted and dowelled jointed connection column restoringforce model. For further finite element analysis and seismic elastoplastic time-historyanalysis reference.