A hybrid topology optimization method applied to reinforced concrete structures using polygonal finite elements

Abstract This work introduces a new alternative to obtain strut-and-tie models using the hybrid topology optimization method, which is already proposed in technical literature and refined here use polygonal finite elements accelerate solution of material nonlinearity problem. In this concrete approached as continuum, two-dimensional elements, steel bars truss one-dimensional with two nodes. For closer representation reality, an orthotropic constitutive model for was implemented considering different compression tensile stiffness values, one advantages model. Further, method limits final layout bars, thereby generating better structures from constructive point view, while allowing greater freedom shape strut slope. However, more complex, it increases computational cost, substantially minimized through implementation algorithm. Results obtained some domains were very close results other methodologies; however, small differences noted that may be relevant result. Other showed differences, significantly changing presenting structural design alternative.