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Department for ENGINEERING STRUCTURES
Professor Vlado MICOV, Ph.D Head of Department
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Bridge EngineeringWhat can we offer?
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IZIIS Experience in the Field ofBridge Engineering
Evaluation of seismic parameters (local and regional) for design of bridges
Seismic evaluation and retrofit of existing bridges
Diagnosis, repair and strengthening of existing bridges
Experimental in situ investigations of existing bridges
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Dynamic analyses of bridges during design phase
Application of seismic isolation of bridge structures
Creation of information systems for bridge populations in Macedonia needed for the purpose of developing an integral Bridge Management System (BMS)
…Contd.
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Application of Methodology for Diagnosis of RC Bridge Structures:“Goce Delcev” Bridge in Skopje
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Destructive test for measurement of forces in the cables of the middle rib
Taken concrete samples
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Experimental Study
o Ambient vibration testso Forced vibration testso Quasi-static testso Shaking-table tests
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Equipment for ambient vibration measurementsEquipment for ambient vibration measurements
Seismometers
Signal conditioner
Fourier analyzer
Plotter
o Ambient vibration testso Forced vibration testso Quasi-static testso Shaking-table tests
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• Shakers
• Control units
• Accelerometers
• Amplifiers
• Fourier analyzer
Equipment for forced vibration measurementsEquipment for forced vibration measurements
o Ambient vibration testso Forced vibration testso Quasi-static testso Shaking-table tests
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Ambient and Forced vibration measurementson bridges - Case studies
Ambient and Forced vibration measurementson bridges - Case studies
RC bridge near“Holliday In” hotel, Skopje
Mode shapes of transversal, vertical and longitudinal vibrations
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Pre-stressed RC overpass, Skopje
Mode shapes of transversal, vertical and longitudinal vibrations
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Disposition of a model ready for quasi-static test in IZIIS’ laboratory
Disposition of a model ready for quasi-static test in IZIIS’ laboratory
o Ambient vibration testso Forced vibration testso Quasi-static testso Shaking-table tests
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Shaking table test on a modelShaking table test on a model
Selected prototype structure for design of test models
Designed model of a bridge with incorporated neoprene bearings and rubber stoppers
1. Model M1 - Neoprene bearings, actual vertical loads and rubber stoppers
2. Model M2 - Neoprene bearings, actual vertical loads, without rubber stoppers
3. Model M3 - Neoprene bearings, vertical loads lower than the prescribed ones
o Ambient vibration testso Forced vibration testso Quasi-static testso Shaking-table tests
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1. Experimental tests on rubber stopper elements for control of dynamic behavior
2. Experimental tests on neoprene bearings under seismic loads
3. Seismic shaking table tests on bridge models with incorporated seismic isolation elements
4. Theoretical research and formulation of nonlinear models of individual seismic isolation models
Seismic isolation of bridge structuresSeismic isolation of bridge structures
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Experimental tests on neoprene bearingsExperimental tests on neoprene bearings
View of a neoprene bearing
Schematic presentation of deformations
Disposition of equipment used for quasi-static tests
Application of cyclic displacement during a test
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Selection of a bridge structure and vibration control elements
Selection of a bridge structure and vibration control elements
Bridge over Vardar river along the Skopje – Gevgelija motorway
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…Seismically Isolated Bridge Structures…
…Seismically Isolated Bridge Structures…
o Application of elements for isolation and absorption of seismic energy in bridge structures is economically justified.
o Design of isolation and seismic energy absorption elements can be successful and verified based on direct dynamic analyses performed for each concrete case
o By use of typified elements for isolation and control of vibrations, practical design is simplified and based on selection of optimal elements for each concrete case.
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Repair of Bridge Structures: Analytical Modeling and Static & Eigen Analyses
Repair of Bridge Structures: Analytical Modeling and Static & Eigen Analyses
Bridge “Goce Delchev” in SkopjeBridge “Goce Delchev” in Skopje
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Seismic Evaluation of Bridge Structures: Analytical Modeling and Dynamic Analyses
Seismic Evaluation of Bridge Structures: Analytical Modeling and Dynamic Analyses
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…Animation of the Structural Response due to Earthquake Excitations
…Animation of the Structural Response due to Earthquake Excitations
Simulation of the structural behavior under
real seismic input
Simulation of the structural behavior under
real seismic input
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Problems regarding the bridge populations in Republic of Macedonia
Problems regarding the bridge populations in Republic of Macedonia
Problems related to existing structures
Problems related to design of new structures
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The institute can be involved in the phase of design of new bridge structures as performer of design, particularly contributing to harmonization of the technical documentation with the new standards (Euro codes).
The Institute can also be involved in the phase of design as a reviewer, in which way it will cooperate with other design engineers contributing to their involvement in application of the Euro codes.
…Problems related to design of new bridge structures
…Problems related to design of new bridge structures
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…Design of new pedestrian bridge “Oko” in Skopje
…Design of new pedestrian bridge “Oko” in Skopje
Numerical model
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…Construction of the pedestrian bridge “Oko” in Skopje (with “Constructor” – Split)
…Construction of the pedestrian bridge “Oko” in Skopje (with “Constructor” – Split)
Construction of the foundation piles – drilling phase
Construction of the right-side abutment
Reinforcement of the foundation piles
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Thank You For Your Attention