Dissertation Topic PresantationPASSIVE CONTROL OF THE SEISMIC RESPONSE OF REINFORCED FRAME BUILDINGS INFLUENCE OF BASE FRAME STRENGTH AND STIFFNESS ON OVERALL SEISMIC PERFORMANCE OF CONTROLLED STRUCTURESSupervisor: Dr Mihail PetkovskiTugay Productions | University of Sheffield

In English...

Seismic Response of Reinforced Frames: How is the structure responding to an earthquake ?

Passive Control: Friction DevicesAct Like a Car Brake System

Dissipate Energy through Friction Forces

(i.e.convert it to heat and surface deformations)Do not Increase the Capacity of the Structure Reduce the Demand on the Structure

Can be Used for Improving Existing Weak Buildings

Friction Devices In Frames

Passive ControlFriction Devices (Dampers)

Friction Devices

Friction Devices

Dissipated EnergyCoefficent of Friction is Constant Normal Force is Adjusted by the Pre Loading Bolts

The Area of Force Displacement Graph Gives the Amount of the Energy Dissipated

Aim of This Research

Can Friction Dampers Improve Reinforced Structures

No Matter What?

What Type of Structures Show Significant Improvement in Seismic Performance with an Added Friction Device? Stiff but Weak Structures ? Strong but Flexiable Structures ? How Much Does the Base Frame Properties Effect ?

Controlled Variables Properties of the Friction Devices Placements of the Friction Devices Ground Motions (Recorded Earthquakes)

Independent Variable Base Frame Strength and Stiffness of the Weak Structure

Assesed Variables Performance of the Improved - Existing Weak Structure Base Shear Force Top Floor Displacement Internal Stresses in the Structural Members

Comparing the Performance With a Properly Designed Sturcture to Eurocode 8(Code for Structures in Seismic Zone)

Materials - Procedure Commercial Software SAP2000 Non Linear Time History Analysis Several Recorded Ground Motions (Earthquakes)

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