Implementation of smeared crack approach in rigid block and spring modeling of reinforced concrete

Abstract

The main purpose of this study is to investigate the structural behavior and cracking response of reinforced concrete (RC) members on the basis of Rigid Block and Spring Method (RBSM). The main problem of this method i.e. the independent evaluation of springs’ stiffness is discussed and modified based on the concept of smeared crack approach. The response of RC membrane element is evaluated by considering the stress transfer mechanisms involving axial behavior of the cracked/un-cracked concrete, axial behavior of the reinforcement and the stress transfer across cracks due to aggregate interlock. A non-iterative approach for estimating the reinforcing bars’ strains based on the shear strain of cracked RC domain is proposed using approximate relationships. Accordingly, the application of smeared crack concept in the RBSM, leads to a more precise simulation of the shear behavior of cracked RC members.