Numerical modelling strategy for predicting the response of reinforced concrete walls using Timoshenko theory

Abstract

In recent decades, different macro-models have been proposed for simulating the behaviour of concrete shear walls because of their significant role in the seismic performance of urban buildings. The ability of Timoshenko's beam theory to evaluate the behaviour of slender and moderate-aspect-ratio concrete shear walls was evaluated in this work. For this purpose, a non-linear displacement-based Timoshenko fibre element was first added to OpenSees software. A new constitutive model based on modified compression field theory was used for the stress–strain relationship of the materials. To validate the element and the materials used, the results of the numerical model were compared with a set of laboratory tests of concrete shear walls subjected to cyclic and seismic loads (shaking table tests). Evaluation of the numerical model and the experimental results revealed that the analysis procedure used to model the reinforced concrete walls predicted their overall and local responses with acceptable accuracy. It can thus be used as a reliable tool for the analysis of slender and moderate-aspect-ratio concrete shear walls.

Structural Damage Identification Using Ensemble Deep Convolutional Neural Network Models

“…Meanwhile, the precision and recall of SSM-SVM, ISE, and WAE-DE are greater than 91% for almost all damage classes. While the recognition of FS damage is challenging in other research studies [46,47], the WAE-DE and SSM-SVM model achieved a near 93% recall and 96% precision in identifying the flexure-shear failure type in the testing dataset. Nevertheless, it seems that the prediction of the FS damage is challenging for the other examined models.…”

An eigendecomposition-based and mesh-sensitivity reduced constitutive model for nonlinear analysis of concrete structures under non-proportional cyclic loading

“…The modified compression field theory (MCFT) [27,28] and fixed angle softened truss (FAST) or softened membrane model (SMM) [29,30] are the two widely adopted models for the nonlinear structural analysis of planar RC elements. Those models repeatedly demonstrated to show good agreement with experimental results and computational efficiency [31][32][33][34]. Uniaxial stress-total strain relationships with or without shear stress transfer were prescribed on the assumed crack planes by those models.…”

Multicriteria Decision-Making Methods in Selecting Seismic Upgrading Strategy of High-Rise RC Wall Buildings

“…The lead-rubber bearings are modeled with a ZeroLength Element and a uniaxial KikuchiAikenLRB material [34,35], which generate non-linear hysteretic curves of the LRB isolators. To simulate the non-linear response of the RC walls, fiber-section model-based Timoshenko beam elements are utilized [36].…”