Experimental Study on the Seismic Performance of the Vertical Joint Seam of Superimposed Concrete Wall Panels

摘要

For the introduction of Germany production technology and production lines of concrete wall, floor, and other prefabricated components at Hefei Economic Development Area, and on the basis of compiling the local industry criteria named Technical Specification for Superimposed Slab Concrete Shear Wall Structure, we have absorbed domestic and foreign new technologies- superimposed slab concrete shear wall structural system. Through extensive investigations, theoretical research, experimental verification and reference to the relevant domestic and foreign advanced standards, we have done some experiments to study on the issue appearing in the technical specification about seismic performance of the vertical joint seam of superimposed concrete wall panels. We have researched the force state, deformation performance of superimposed concrete wall panels and the differences from the general full-spot-pouring shear wall through the use of single shear wall with different tectonic connected manner in a level low-cycle repeated load. Experimental research shows that the force state and breakage form of superimposed concrete wall panels are in accordance with the full-spot-pouring shear wall on the whole, which all belong to bend shear damage. As the plastic deformation of superimposed slab shear wall in a level load mainly concentrates in the vicinity of the section in connection with the basis and the plastic area is small, the ductility and deformation capacity of structure are poorer than full-spot-pouring shear wall structure. However, the bending bearing capacity of superimposed concrete wall panels from the experiment is close to the theoretical calculated value reference to our criterion. It also shows that the prefabricated panels and the core concrete part of superimposed slab shear wall can work well together. Though its carrying capacity is to some extent lower than full-spot-pouring concrete shear wall, we can calculate the carrying capacity and design with a degree of amendment reference to our criterion. It can guarantee the integrity of superimposed wall panels from taking the measures of adding covert column or level steel at its vertical splicing. It provides a reliable scientific basis for ' Technical Specification for Superimposed Slab Concrete Shear Wall Structure'.