Document Type : Original Article
Authors
1
Associate Professor, Faculty of Civil Engineering, Semnan University
2
Faculty of Civil Engineering, Semnan University, Semnan, Iran
3
M.Sc. Student, Department of Civil Engineering, Faculty of Engineering, Islamic Azad University, Tehran, Iran
4
M.Sc. Student, College of Civil Engineering, Iran University of Science and Technology Tehran, Iran
Abstract
Bridges are the most fundamental structures to be utilized after the earthquake. Bridges may be classified by how the forces of tension, compression, bending, torsion, and shear are distributed through their structure. Most bridges will employ all of the principal forces to some degree, but only a few will predominate. The separation of forces may be quite clear. In a suspension or cable-stayed span, the elements in tension are distinct in shape and placement. In other cases the forces may be distributed among a large number of members, as in a truss. A large force is applied to bridge deck due to the earthquake which leads to structural damage if it is not dissipated. The damage in bridges also blocks available roads and causes discontinuance in relief operation which leads to more casualties. Using control systems is one of the major ways to reduce vertical vibrations in bridges. Controlling systems can increase efficiency, safety, and utilization of bridges. Various methods have been evaluated for reducing the vibrations so far in which the most common ones include active, passive, semi-active and hybrid systems. This study is aimed to evaluate viscoelastic, frictional, metal, and tuned mass dampers and elastomeric and sliding isolation in bridges.
Keywords