Hybrid Micro-Modeling Approach for the Analysis of the Cyclic Behavior of RC Frames

Abstract

The present study is aimed at developing a hybrid approach to consider the effect of concrete cracking on the hysteretic response of RC frames. The mechanical behavior of the concrete is defined according to the smeared cracking approach, while discrete cracking surfaces are included in the geometrical model. The interface behavior of the discrete cracking surfaces is defined by the combination of contact and cohesive elements. The proposed approach is adopted in ABAQUS to simulate an experimental test on a double cantilever column for the calibration of the numerical model. Therefore, a test conducted on a RC portal and modeled numerically for the first time is simulated. Numerical and experimental results are compared in terms of hysteretic forcedisplacement behavior and cumulative dissipated energy, in order to assess the reliability of the proposed model in simulating the energy dissipation capacity of RC members subjected to lateral cyclic loading. The hybrid modeling approach proposed allows an accurate description of the stress distribution and a fairly satisfactory matching of the hysteretic behavior with a reasonable compromise in terms of computational effort.

Effect of corrosion in reinforced concrete frame components on pushover behavior and ductility of frame

“…Figure 12 clearly shows that the effect of pinching on the results of the numerical model is different from the experimental model. According to experimental studies, the pinching effect is associated with crack closure, shear lock, slippage of longitudinal reinforcement, and so on 59,60 . Because in this paper, we are looking for maximum displacement and base shear by using pushover analysis, the effect of pinching which reduces the amount of dissipated energy during the cyclic response of the member, will not have such an effect on our work.…”

Out-of-plane response of ECC-strengthened masonry walls

“…The advantages of macro-modelling approach over micromodelling are the following: (a) Macro-modelling approach required less computational effort and time, whereas micromodelling approach required high computation effort and takes more time (Blasi, De Luca, & Aiello, 2018); (b) Macromodelling approach is generally adopted for finding the global overall response, whereas micro-modelling approach is suitable for local behavior (Kunnath, 2018); (c) Macromodelling approach can be used for large scale (e.g. masonry walls made of more than one layer of stack-bonded bricks), whereas micro-modelling approach is suitable for small scale like masonry prism with one layer of stack-bonded bricks; (d) Macro-modelling approach is reliable for its great approximation results with the comparison to micro-modelling approach for the case of masonry walls (Abbas & Saeed, 2017).…”