Title:
Behavior of Partially Restrained Slabs Under Concentrated Load
Author(s):
I-Kua Fang, Ju-Hsin Lee, and Chun-Ray Chen
Publication:
Structural Journal
Volume:
91
Issue:
2
Appears on pages(s):
133-139
Keywords:
bridge decks; punching shear; reinforced concrete; Structural Research
DOI:
10.14359/4557
Date:
3/1/1994
Abstract:
The behavior of 18 partially restrained reinforced concrete slabs with isotropic reinforcements under concentrated load is reported. The primary variables included concrete strength, reinforcement content, grade of steel, thickness of slab, and the degree of fixity at support. Test results indicated that all the slabs finally failed by punching. The key elements determining the load capacity of thick slabs (h = 115 mm) were concrete strength and thickness. The amount of steel did not significantly affect the load capacity, whereas for thin slabs (h = 75 mm) the load capacity was primarily dominated by flexural capacity. At failure, the membrane action of all slabs had become tensile. Slabs having lower reinforcement content exhibited greater intensity and longer existence of the state of compressive membrane action if they had the same span-to-depth ratio and thickness.