Seismic Performance Tests of Prefabricated Concrete Frames with Embedded Composite Lightweight Aggregate Partition Wall Panels

In order to study the seismic performance of a prefabricated RC (reinforced concrete) frame with embedded composite lightweight aggregate partition wall panels, quasi-static load tests were carried out on one trusses of prefabricated concrete empty frame, one trusses of aerated concrete block filled wall-prefabricated concrete frame and one trusses of composite lightweight aggregate wall-prefabricated concrete frame. The cooperative mechanical properties and working mechanism of wall panels and frame under earthquake were studied, and the failure characteristics, load-displacement curve, stiffness degradation, ductility and energy dissipation capacity of the structure were analyzed. The test results showed that the embedded connections of the composite lightweight aggregate partition wall panels were safe and reliable, which could effectively ensure the cooperative work of composite lightweight aggregate wall panels and frame under the action of earthquake. Compared with the aerated concrete filled wall, the ultimate horizontal bearing capacity and initial stiffness of the composite lightweight aggregate wall panels were significantly increased. The mean value of elastic displacement angle θ_y and the mean value of elastic-plastic limit displacement angle θ_u of composite lightweight aggregate wall-prefabricated concrete frame could meet the specification requirements. Based on the test results, the restoring force model of the structure was proposed, and the good coincidence of the model was verified, which provided a theoretical basis for the application of the embedded composite lightweight aggregate partition wall panels in prefabricated structures.