The electromechanical impedance (EMI) technique is one of the most effective methods for regularly inspecting structures. This technique relies on measuring the dynamic EMI responses using piezoelectric lead zirconate titanate (PZT) sensors, which can be either embedded in or surface bonded to the structure. Any changes in the structure’s frequency response compared to a baseline response indicate potential damage. The process involves analysing electrical responses resulting from physical changes in the structure using PZT sensors. Despite significant advancements in the field of structural health monitoring (SHM) using piezoelectric sensors, there has been limited research focusing on the integrity monitoring of truss structures. This study aims to detect damage and assess the integrity of steel truss structures using EMI simulation. A numerical study has been conducted to investigate the effects of different loads and the progression of damages. Furthermore, the impact of damage to the adhesive layer bonding the PZT sensor to the structure has also been examined, as it can alter responses and lead to inaccurate assessments. Additionally, a parametric study has been carried out to understand the effects of changes in the properties of the piezo bond. The responses have been quantified and analysed using root mean squared deviation (RMSD) indices.