Analyzing SHCC Structures with an Efficient Discrete Model

Abstract

Strain hardening cementitious composites (SHCC) are materials exhibiting high deformation capacity and excellent crack control, which have shown great potential for various engineering applications. In our previous study, a new discrete model is proposed for SHCC, with the use of continuum element for matrix damage/cracking behavior, truss element for fiber bridging effect and interface element for matrix-fiber interaction. By adopting appropriate constitutive laws for these elements, the proposed discrete model can accurately and efficiently reproduce the multiple cracking behavior and realistic load-displacement response of SHCC member under direct tension. Here the discrete model is used to simulate the failure process of SHCC members in real applications, such as under bending, under restrained shrinkage and subject to reflective cracking. It is found that the crack pattern, failure mode and load-displacement response under these conditions can be well captured by the discrete model. The work should provide insights into the failure mechanism of SHCC structures and the further optimization of their performance.