In this paper, we propose a fast computation of beam-type dynamic response to a moving mass.\ud Dynamics of a single-span beam is first accurately computed with a semi-analytical procedure based on\ud characteristic orthogonal polynomials (COPs), in the case of a force or a mass traveling across. A regression\ud analysis is then adopted to automatically define the effects of the moving mass once the effects of the moving\ud force are known. Best-fitting multivariable correlation splines, with strictly given coefficients, are obtained.\ud The provided correlation splines conveniently interpolate the maximum design parameters of the base beam\ud over a wide range of load inertia and velocity. Results provided are valid for any geometry and elastic stiffness\ud of the beam, thanks to a properly set normalization factor here defined. Hence, practitioners are provided with\ud an effortless and highly simplified direct prediction of design parameters when inertial interactions are taken\ud into consideration

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This study aims to develop a practical methodology based on Eigenfunction Expansion Method (EEM) to assess the effects of simultaneous action of vertical earthquake excitation and moving vehicle loads in singlespan and multi-span simply supported bridges. While the effects of vertical earthquake ground motions are For the same maximum deflection limits, application of pipe dampers could reduce (up to 50%) the required flexural rigidity of the bridge, and therefore, lead to a more economic design solution with lower structural weight.