EXPERIMENTAL AND NUMERICAL STUDY ON OUT-OF-PLANE BENDING BEHAVIOR OF A SUPERIMPOSED WALL WITH EMBEDDED FOUNDATION

A kind of embedded foundation was suggested for the superimposed basement exterior wall to improve its performance under out-of-plane bending moment. Four specimens, divided into two groups, were tested under static loads simulating the earth pressure. The test results indicated that embedded depth of the wall has obvious effects on the behavior of the specimens. For the first group of specimens, with comparatively large embedded depth, the foundations remained almost intact and the failure mode appeared to be diagonal tension failure under shear force and bending moment near the bottom of the walls. For the second group of specimens, with comparatively small embedded depth, the foundations were severely damaged and the failure mode occurred when the plastic hinges at the mid-span of the specimens reaching their ultimate rotation. The precast panels and the cast-in-place core concrete of the specimens could work together and no obvious slippage was observed. Based on the test, numerical investigation of the specimens was conducted using ANSYS. Comparison between the analyzing and test results showed that the finite element model was able to predict the mechanical behavior and damage pattern of the specimens well, and could be used in further study.