Analytical modelling and model validation of high force-to-volume (HF2V) damping devices and a DAD non-dilating steel connection utilising these devices is presented. The 2D exterior connection design incorporates a top-hung angle for the beam-column connection and HF2V devices create a damage-free moment resisting connection. Experimental results show consistently repeatable hysteretic behaviour to 4% drift with neither stiffness nor strength degradation. The analytical model of the connection shows good agreement between experimental and model results. The rate-dependent model defines overall hysteresis using a predictor-corrector solution to the governing non-linear ODE. Based entirely on rational mechanics, the model does not require prior experimental data for empirical calibration, enabling simultaneous design of the desired connection mechanics and energy dissipation, and the device requirements.