Lateral Strength of Squat Steel-Plate-Concrete Composite and Squat Reinforced Concrete Walls
Date Issued
2015
Date
2015
Author(s)
Khong, Van-Sang
Abstract
The research focused on the lateral strength of rectangular steel-plate-concrete (SC) composite and squat reinforced concrete (RC) walls. An experimental program was executed in the NCREE laboratory at the National Taiwan University and was followed by numerical and analytical studies. In the experimental program, one RC and two SC walls were tested under displacement-controlled cyclic loadings. The RC wall specimen, its design variables considered in the testing program included wall thickness, reinforcement ratio, and concrete compressive strength. The aspect ratio (height-to-length) of the walls was 0.5. The SC walls considered in this study were composed of two steel faceplates and infill concrete. The steel faceplates were connected together and to the infill concrete using tie rods and headed studs, respectively. Observed damages in RC specimen were formed in the diagonal direction at first cracking. Severe damages were then concentrated at the mid-high level of the wall and along the load transferring steel beams. The progression of damage in the SC wall specimens were identical, namely, cracking and crushing of the infill concrete at the toes of the walls, outward buckling and yielding of the steel faceplates near the base of the wall, and tearing of the faceplates. A finite element model was developed in LS-DYNA to determine the monotonic response of RC walls. The DYNA model was validated using the results of the cyclic tests of the RC wall specimen. The analytical models were also verified using the test data. The validated and benchmarked equations were then used to conduct a parametric study, which investigated the effects of wall aspect ratio, reinforcement ratio, wall thickness, and uniaxial concrete compressive strength on the lateral strength of RC and SC walls.
Subjects
Squat wall
reinforced concrete
lateral strength
reinforcement ratio
Type
thesis
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