Title:
Technique for Measuring the Interface Confining Stress in Concrete-Filled Steel tubes: Hydraulic analogy
Author(s):
R. Y. Miao and W. H. Yang
Publication:
Symposium Paper
Volume:
143
Issue:
Appears on pages(s):
145-165
Keywords:
cores; experiments; hydraulics; reinforcing steels; steel tubes; stresses; Structural Research
DOI:
10.14359/4583
Date:
5/1/1994
Abstract:
The interface confining stress between steel tube and core concrete is an important problem in the analysis of the behavior of concrete-filled steel tubes. However, no satisfactory experimental method to measure the interface stress directly has been developed because of the peculiar geometry of concrete-filled steel tubes. In this study, the significance of measuring interface stress is discussed, and the use of hydraulic analogy, or analogous hydraulically loaded control specimens, is introduced. In this paper, the fundamental mechanism, instrumentation, and procedure of hydraulic analogy will be described in detail together with examples.