Abstract:
Simulation of failures using Abstract: laboratory experiments will be expensive and time
consuming. To overcome these problems making use of finite element methods and advantages of
computational software are key considerations. However, proper simulation of structural behaviour is
a key factor in the use of FEM analysis. Worldwide a lot of research studies have given attention in
this context but in Sri Lanka, concern on this point is considerably less. This paper contains:
identification of type of elements like solid-65 and link-8, material models, boundary conditions and
other relevant modelling parameters suitable to model structural failures in RC structural elements
using ANSYS. Further it seeks to identify the suitability of discrete modelling of reinforcement model.
The initial crack formation, failure load and load-displacement curve of beams from laboratory
experiments are compared with the nonlinear finite element models using ANSYS to ensure accuracy
of model parameters. The accuracy of model is further checked with mesh density and analysis type
by conducting different model analysis by changing the parameters and the observations are reported.
This paper concludes simulation of flexural failure can be done using ANSYS by small displacement
static analysis (equilibrium equations are constructed based on initial position) or large displacement
static analysis (equilibrium equations are constructed based on deflected position). However
simulation of shear failure is a difficult task since ANSYS has limitations in modelling shear failure
using large displacement analysis or small displacement analysis. Further difficulty to converge a
solution can be reduced by large displacement static analysis.
Citation:
Rokilan, M., & Baskaran, K. (2014). Modelling of structural failures in RC beam elements using ANSYS. In M.T.P. Hettiarachchi, (Ed.), Proceedings of the Civil Engineering Research Symposium 2014 (pp. 37-43). Department of Civil Engineering, University of Moratuwa.
