ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Steel reinforced high strength and high performance concrete (SRHSHPC) specimens wereexperimented to study the mechanical behaviors between steel and concrete interface. In experiment,interfacial bond softening process was observed, which can be explained in terms of damage along theinterface, leading to progressive reduction of shear transfer capability between steel and high strengthand high performance concrete (HSHPC). In this paper, bond softening process along the interface isconsidered in the analysis of crack-induced debonding. Interfacial bond-slip mechanism betweensteel and HSHPC is studied in detail based on fracture mechanics. With the help of acoustic emissionstechnology, the crack propagation in the interlayer was observed, thus the interfacial crackpropagation and fracture model is set up. Under the assumption that the interlayer is weak concretecompared with concrete matrix, the stress field as well as displacement field around the crack tip isdeduced. The characteristics of interfacial fracture process are discussed and a model for interfacialfracture process zone is built up. With this model, the size of fracture process zone can be derived. Atlast, the influence of the fracture process zone on interfacial fracture toughness is determined usingcritical fracture toughness. All these may contribute to improvement of theory for SRHSHPCcomposite structure
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/55/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.348-349.853.pdf
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