Seismic performance and calculation method of L-shaped corrugated double-skin composite wall

Abstract

L-shaped double-skin composite walls (L-DSCWs) have been increasingly applied in high-rise buildings due to their excellent seismic performance. Existing studies have primarily focused on L-DSCWs with flat steel faceplates and various length-to-width ratios. In this study, four 1/3-scale L-DSCW specimens with different faceplate profiles and length-to-width ratios were tested under cyclic lateral loading. The test results showed that length-to-width ratio had a significant influence on the peak lateral load, stiffness and energy dissipation capacity. With the length-to-width ratio increasing from 5.0 to 7.0, the peak lateral load, stiffness and energy dissipation of the L-DSCWs with flat faceplates increased by 27.8%, 61.4% and 23.5%, respectively. The faceplate profiles also influences the seismic performance of L-DSCWs.When the faceplate profile changed form flat to corrugated, the peak lateral load and energy dissipation increased by 6.2% and 14.9%, respectively. All specimens have a good ductility, with ductility ratios greater than 5.4. A formula for the ultimate bending capacity was derived and validated against the test results, with an error of less than 11%.