This paper discusses: (a) common analytical models used to study structural systems with metallic passive energy dissipation devices, (b) the validity of some analytical simplifications for the non-linear analysis of structures with metallic passive energy dissipators and, (3) aspects that should be taken into account for the design of structures with metallic energy dissipators from the structural analysis viewpoint. Some recommendations are made for the structural analysis of buildings with metallic energy dissipators, particularly for the ADAS energy dissipation device. INTRODUCTION The study of passive energy dissipators for earthquake engineering applications has been a subject of interest of many researchers worldwide during the past two decades. In Mexico, metallic devices that dissipate energy through a stable hysteretic behaviour have caught the attention of most Mexican researchers and practising engineers, primarily the ADAS, TADAS and DS devices (Fig. 1). In particular, the ADAS devices [1] have caught most of the attention of both researchers [2] and practising engineers [3], particularly because there are already three important buildings in Mexico City that have been retrofit with this system [3], as well as other three new buildings originally design with ADAS devices in Acapulco. The TADAS devices [4] have been of interest for analytical research only [5]. Another device know as "Dispositivo Solera" (DS) in Mexico [6] has been subject of important experimental research including shaking table tests, as well as analytical studies for potential applications [7], however, there are not yet new or retrofit buildings with DS devices. There are several works already available in the literature where parametric analytical studies were conducted in simple models to evaluate the applicability of metallic passive energy dissipators as an efficient option to control the seismic response of building structures. Unfortunately, most of these studies do not provide details on the simple models they use and their validity, particularly on the non-linear modelling of the device-bracing system. Many of these studies consider an elastic-perfectly-plastic behaviour for these devices, whereas a clear