Shaking table test of the single-layer aluminum alloy cylindrical reticulated shell

Abstract

Aluminum alloys have been increasingly used in reticulated shells due to their favorable properties. A single-layer aluminum alloy cylindrical reticulated shell model with a length and width of 3.6 m is designed to study its seismic performance. A shaking table test is carried out to test the natural vibration characteristics of the model. A dynamic response test of the reticulated shell model is conducted under frequent, rare and severe earthquakes. The difference in the stress characteristics of the reticulated shell affected by two horizontal seismic waves is compared. The acceleration, displacement, and strain responses of the model under different horizontal seismic waves are analyzed, and the collapse and failure characteristics of the reticulated shell model are studied. The non-linear code ABAQUS is used for numerical simulation, and the validity of the finite element (FE) model is verified by comparing the simulation and experimental results. The results show that the bending moment controls the stress of the cylindrical reticulated shell members under a horizontal earthquake. Under rare earthquakes, the reticulated shell model remains elastic. After reaching the plastic stage under a severe earthquake, the reticulated shell retains its high bearing capacity, indicating excellent seismic performance. The joints of the reticulated shell exhibit weakness under stress, thus, it should be considered in the seismic design. The test results show that the single-layer cylindrical reticulated shell has the risk of progressive collapse.