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In this paper, free vibrations of large repetitive regular planar and space trusses are considered. For this kind of structures the corresponding stiffness and mass matrices have tri-diagonal block and in the canonical form, ) , , ( T F B A B K  and ) , , ( 0 D 0 M G  , which simplifies their Eigen frequencies. Practical large space and planar trusses contains with repetitive units, known as ...

Roadways pose serious threats to animal populations. The installation of roadway mitigation measures is becoming increasingly common, yet studies that rigorously evaluate the effectiveness of these conservation tools remain rare. A highway expansion project in Ontario, Canada included exclusion fencing and ecopassages as mitigation measures designed to offset detrimental effects to one of the m...

A study of architectural walls for energy dissipation and vibration control of buildings in seismic zones is presented. Typical architectural walls exhibit inelastic behavior; however, both the stiiness and energy dissipation capacity degrade after the walls are damaged. Integrating passive damping devices within these walls augments their energy dissipative abilities by widening the hysteresis...

The application of dynamic vibration absorbers (DVA) to Wind Turbine (WT) towers has the potential significantly improve damping tower and nacelle responses, increasing thus reliability WTs. Tuned Mass Damper (TMD) is limited by requirement large masses, in association its installation location. In this study, two alternative concepts are considered. First, released from WT tower, using a low s...

Abstract In earlier days, the only way to resist lateral loads was increase strength of structure obtained by making larger cross sections and massive buildings. Structural control is one solutions important topics in both points view security comfort recent years. To reduce effect seismic energy, structural forms used outrigger. years, supplementary devices are installed into outrigger so that...