Abstract
The manuscript proposes a simplified macro modeling approach to estimate the in-plane nonlinear response of infilled RC frames efficiently. The most commonly used macro modeling technique for the simulation of infill in RC frame is using an equivalent diagonal pin-jointed compressive strut. The present modeling approach extends the same technique and predicts the initial stiffness, peak strength, and overall load-deformation behavior with a more accurate approximation as compared to ASCE 41-06 model. The proposed model modifies the elastic modulus of the equivalent strut and RC column system based on the initial stiffness of the infilled RC frame. The accuracy of the proposed procedure is evaluated with the backbone envelopes of 12 single-bay, single-storey physically tested infilled RC frames. Comparison of numerically developed capacity curves with the experimental envelopes shows that the peak strength predicted by the proposed model is in good agreement with experimental data. Also, a good approximation of the initial stiffness of the infilled frame has been achieved. The proposed simplified macro modeling approach is an improvement over the widely used ASCE 41-06 infill model in estimating the initial stiffness, peak strength, and overall load-deformation behavior.
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Kurmi, P., Haldar, P. (2022). Simplified Macro Modeling Approach for Estimation of Nonlinear Response of Infilled RC Frames. In: Kolathayar, S., Chian, S.C. (eds) Recent Advances in Earthquake Engineering . Lecture Notes in Civil Engineering, vol 175. Springer, Singapore. https://doi.org/10.1007/978-981-16-4617-1_36
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