A linear dynamic vehicle-bridge interaction method is proposed in this paper. This VBI system can be easily simulated by a step-by-step solution technique based on precise time-integration following discretization of the bridge and modal analysis finite element model. By selecting target structural mode with high participation analysis, huge computational overhead caused multi-degrees freedom l...

Current design and analysis methods of helical springs are significantly confined to a simple linear domain. The traditional spring formula is only effective for analyzing with geometric properties like constant coil diameter, unchanged pitch no contact. An advanced analytical model proposed in this study address the non-linear effects variable contact that exist arbitrary shapes. It aims expan...

bridges, as an essential part of transportation system, play a special role in economy, politic and military all around the world. serviceability of bridges is of high importance especially in emergencies, helping injured people and proportioning transportation after earthquakes. earthquake regulation codes, normally suggest linear methods to conduct the analysis, and nonlinear analysis is bare...

a study on the evaluating equivalent damping and response modification factors of frames equipped by pall friction dampers is presented. to do so, buildings with various stories were considered. nonlinear and linear dynamic time history analysis has been performed to evaluate equivalent damping for pall friction dampers. ground motions with various frequency characteristics scaled with iranian ...

In this paper the analytical formulation of frequency domain analysis is reviewed, under a unifying approach, for deterministic and random dynamic loading. In the random case both stationary and nonstationary excitations are considered. It is shown how, in all cases, a complex linear system must be solved at each frequency step; if the solutions are carried on independently, the solution cost g...