State of the Art on Mechanical Properties of Precast Prestressed Concrete Structures(for Buildings and Utility Tunnels)
Precast prestressed concrete structures,possessing the characteristics of both precast concrete structures and prestressed concrete structures,exhibit promising application prospects in the fields of con-struction and infrastructure.The paper systematically summarized the research progress made by domestic and international research teams,including the authors'group,on the mechanical properties of precast prestressed concrete frames,shear walls,and utility tunnel structures.The research objects primarily en-compassed two types of precast prestressed concrete frame structures(with precast and cast-in-situ joint cores),precast prestressed concrete shear wall structures,and precast prestressed concrete utility tunnel structures.Existing research indicates that all three structures possessed excellent bearing capacity and de-formation recovery capability.Precast prestressed concrete frame structures with precast joint cores exhibi-ted limited ductility and energy dissipation capability,displaying typical semi-rigid characteristics,while those with cast-in-situ joint cores demonstrated good seismic performance.Precast prestressed concrete shear wall structures primarily underwent rigid body rotation during seismic events,with no significant dam-age or residual deformation to the main wall body,but their ductility and energy dissipation capacity were unsatisfactory.Precast prestressed concrete utility tunnel structures demonstrated good waterproof perform-ance,high bearing capacity and recovery capability.Furthermore,the applications and codes for these three types of structures were summarized.Finally,the research prospects for precast prestressed concrete structures were discussed.
万方数据
维普
