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|Title:||Analytical model for reinforced concrete under cyclic loading|
|Doctoral Committee Chair(s):||Schnobrich, William C.|
|Department / Program:||Civil and Environmental Engineering|
|Degree Granting Institution:||University of Illinois at Urbana-Champaign|
|Abstract:||The finite element method is a very powerful computational technique for computer solution of complex problems. Its formulation can include both geometrical and material nonlinearities at the element level. Unfortunately, the validity of the nonlinear finite element analysis is often limited by the inadequate understanding and modelling of material behavior. In many cases the degree of sophistication of the global structural analysis techniques is far superior to that of the material models being used. This situation is especially true with reinforced concrete structures. As a composite material, reinforced concrete exhibits a highly nonlinear behavior, especially after cracking. Besides material nonlinearities of the constituent materials of steel and concrete, which dominate the pre-cracking response, aggregate interlock, dowel action and bond slip come into the picture of the post-cracking response.
In the present study, a constitutive model for reinforced concrete under cyclic loading is formulated. Concrete is modelled as an incrementally orthotropic material while the stress-strain relationship for steel includes yielding, strain hardening and a Bauschinger effect. The adopted multi-crack model, with which a crack law is associated, takes into account the behavior of each crack interface. Based on relevant experimental observations, one particular constitutive law for cracks is developed. To verify the proposed constitutive model, a number of experimental specimens under either monotonic or cyclic loading are analyzed with the analytical results compared with the corresponding test data.
|Rights Information:||Copyright 1991 Xu, Chunjian|
|Date Available in IDEALS:||2011-05-07|
|Identifier in Online Catalog:||AAI9136770|
This item appears in the following Collection(s)
Graduate Dissertations and Theses at Illinois
Graduate Theses and Dissertations at Illinois
Dissertations and Theses - Civil and Environmental Engineering