Journal ArticleDOI
Inelastic Analysis of Reinforced Concrete Frames
TLDR
In this article, a generalized formulation of the imposed rotation method for the inelastic analysis of multistory frames is presented. But this method is not applicable to the analysis of multi-dimensional structures.Abstract:
The imposed rotation method for the inelastic analysis of frames rests on the interpretation of the actual bending moment distribution as the superposition of linear elastic moment responses to loads and to unknown plastic rotations regarded as imposed strains. The method given herein is a generalized formulation, covering second-order geometric effects and moment-axial force interaction. Finite element models of frames and piecewise linear moment-rotation laws for critical sections are assumed. Recent algorithms for solving quadratic programming and linear complementarity problems are shown to be efficiently applicable to the analysis of multistory frames. The safety factor with respect to local failure because of “brittle” flexural behavior turns out to be attainable by a suitably modified linear programming procedure.read more
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Journal ArticleDOI
Combined elastoplastic and limit analysis via restricted basis linear programming
TL;DR: In this article, the complete stress and strain response of elastic-perfectly plastic structures subjected to proportional loading up to collapse is determined by a method essentially consisting of a linear programming procedure supplemented by an additional rule which enforces a complementarity relation among variables at each pivotal step (restricted basis entry).
Journal ArticleDOI
An efficient nonlinear analysis of RC sections
Hayder A. Rasheed,K.S. Dinno +1 more
TL;DR: In this article, an efficient incremental-iterative analysis algorithm using the secant stiffness approach is developed, considering carefully investigated material models, for the direct prediction of the complete monotonic response of RC rectangular sections together with the relevant flexural and axial rigidities throughout this response.
Journal ArticleDOI
Mathematical programming and nonlinear finite element analysis
TL;DR: A unified computational scheme is presented, and comparisons are made between the mathematical programming techniques and the so-called “direct” methods for nonlinear finite element analysis.
Journal ArticleDOI
Drift-sensitive non-structural damage to masonry-infilled reinforced concrete frames designed to Eurocode 8
TL;DR: In this article, the authors investigated the drift-sensitive non-structural damage to reinforced concrete frame buildings complying with the European seismic code, and quantified the nonstructural unreinforced masonry infill walls in contact with the frame.
Journal ArticleDOI
Concrete structure design using mixed-integer nonlinear programming with complementarity constraints
TL;DR: The design of minimum cost RC structures introduces a new class of optimization problems, namely, mixed-integer nonlinear programs with complementarity constraints, which are used to model RC element strength and American Concrete Institute code-required safety factors.
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