Title: Load-Transfer Design of Wall-Piloti Structure with Lateral Support
Author(s): Sung-Hyun Kim, Hong-Gun Park, and Hyeon-Jong Hwang
Publication: Structural Journal
Appears on pages(s): 169-180
Keywords: bearing wall; capacity design; cyclic loading; pilotis; strut-and-tie model
In Korea, bearing-wall structures with pilotis have been frequently used for high-rise residential buildings. In the present study, an economical load-transfer design and the reinforcing bar details were studied for bearing walls with pilotis, which are laterally supported by other vertically continuous walls. Four specimens were tested under gravity loads and cyclic lateral loading. To avoid a brittle failure of the interface between the wall and pilotis, a capacity design was applied to the design of the test specimens. The test results showed that ductile flexural yielding of the upper wall occurred without premature brittle failure of the transfer wall, columns, and the critical interface section. To confirm the test strength, a strut-and-tie model was applied to the test specimens. The strength and damage mode predicted by the strut-and-tie model agreed with the test result. Based on the test results and the strut-and-tie model used for the test specimens, a strut-and-tie model was proposed for the actual design of the prototype wall, and the relevant reinforcing bar details were proposed. The safety of the design was confirmed by nonlinear finite element analysis.