Research on the Prefabricated Frame Structure System Connected by Ultra-High Performance Concrete and Experimental Test
This paper aims to address the problems of high precision requirements,low tolerance for errors,large workload,high technical requirements,and difficulty in quality assurance in steel bar connections for existing prefabricated buildings,which result in low efficiency,high costs,and challenges in quality control.Leveraging the super high mechanical properties of ultra-high performance concrete(UHPC)and its excellent bonding and anchoring properties with steel bars and regular concrete,a two-story fully prefabricated framed structure was constructed using the"direct anchoring with short splice of steel bars and UHPC pouring"connection technology to verify its technical feasibility.Tests on indoor material properties and seismic performance of joints demonstrated that the interfacial bonding performance between UHPC and the reinforced concrete and the common concrete fully meets the stress requirements,and the joints satisfy the seismic performance requirements of"strong column and weak beam"and"strong joint and weak member".The results of the water loading test indicated that under design loads,performance indicators such as stress and strain of steel bars,relative slip,bonding stress at the interface between UHPC and concrete,beam deflection,and crack width fully meet the design and specification requirements.
ultra-high performance concreteprefabricatedframe structureexperimental test
万方数据
维普
