Finite element analysis of RC tension member based on pseudodiscrete crack model

Abstract

Conventionally, crack analysis of reinforced concrete (RC) members may be conducted by using the finite element method based on smeared crack model or discrete crack model. However, both the smeared and discrete representations of cracks have their own deficiencies. The smear crack model could not realistically reflect the crack paths and hence could not compute crack widths correctly. Whilst the discrete crack model is difficult to apply because of the need to adaptively generate discrete crack elements according to the cracks formed during the loading process. By transforming and reformulating the smeared crack model, a pseudo-discrete crack model is developed for finite element implementation. Moreover, the novel crack queuing algorithm is introduced to simulate the stress redistribution during cracking. The analysis method allows accurate computation of the crack spacing, widths and pattern. To verify its applicability and accuracy, the method is applied to analyse RC tension members in the literature, whereby satisfactory numerical results are obtained. Furthermore, the cracking behaviour of tension members reinforced with high-strength steel bars is studied.