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 concrete (SRC) structure is a kind of building structure with excellentmechanical performance, but the theory of crack width is not very clear. In recent years, the fractureenergy is more and more applied to research concrete materials, which has opened up a new field forconcrete materials modeling. In this paper, crack width model for SRC structure based on fractureenergy concept is put forward. A uniaxial tension model is employed in the analysis forsimplification. On the ground of the stress equilibrium as well as the relation among relative slip, steelstrain and concrete strain, the basic equations are derived. By introducing the interfacial nonlinearbond stress versus slip constitutive relation between embedded steel and concrete, the analyticalsolution for distribution of slip along the interface is obtained. And based on this result, the influenceof the interfacial bond-slip on tension stiffening of the steel is considered. The displacements of steeland concrete at the crack face under different load levels are computed and analyzed respectively.Finally according to the principle of work and power as well as the fracture energy concept of plainconcrete, expression for fracture energy of SRC structures is obtained, and the relation of crack widthand concrete fracture energy is established. The comparison shows that the fracture energy based onthe model agrees with the test results well
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/57/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.385-387.93.pdf
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