Title:
Shear Strength of Cylindrical Reinforced Concrete and Prestressed Concrete Walls under Cyclic Lateral Loading
Author(s):
Hyeon-Keun Yang and Hong-Gun Park
Publication:
Structural Journal
Volume:
120
Issue:
1
Appears on pages(s):
119-133
Keywords:
cyclic loading; cylindrical wall; delamination zone; horizontal post-tensioning; shear strength
DOI:
10.14359/51736120
Date:
1/1/2023
Abstract:
To investigate the shear strength of a nuclear power plant containment structure, six small-scale specimens of reinforced- or post-tensioned cylindrical concrete walls were tested under cyclic lateral loading. Particularly, the present study focused on the effect of the magnitude of vertical and horizontal prestressing forces. Further, to investigate the effect of high-frequency earthquakes, high-rate loading as well as low-rate loading were considered. The test results showed that the shear strengths of reinforced concrete (RC) walls and prestressed concrete (PSC) wall without horizontal
prestressing force were greater than the nominal shear strength specified in current design/evaluation methods. On the other hand, in the case of walls subjected to horizontal prestressing force, the shear strengths were decreased, due to early delamination of the cover concrete. Particularly, strength degradation was pronounced when full horizontal prestressing was applied. The effect of early delamination was further investigated through nonlinear finite element analysis.
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