2. Background and Expertise on WG3/WP9Mutlu SEER, M.Sc. (TR)M.Sc. Thesis: Nonlinear Analysis Methods of Steel StructuresPh.D. Thesis (On going study): Investigation of Stress Strain Time Relationships in Framed StructuresSpecial Interests:Second Order Analysis Techniques in Steel FramesAnalysis of Semi Rigid Connections in Steel FramesAnalysis of ImperfectionsStability of StructuresPractical Advanced Analysis Methods Performance Based Analysis of Structures.
1. EVALUATION OF EXISTING STRUCTURES MUTLU SEÇER ÖZGÜR BOZDAG
DOKUZ EYLÜL UNIVERSITY
CIVIL ENGINEERING DEPARTMENT
STRUCTURAL ENGINEERING DIVISION
13 DECEMBER 2006
2. 2 Background and Expertise on WG3/WP9
Mutlu SEÇER, M.Sc. (TR)
M.Sc. Thesis: Nonlinear Analysis Methods of Steel Structures
Ph.D. Thesis (On going study): Investigation of Stress Strain Time Relationships in Framed Structures
Second Order Analysis Techniques in Steel Frames
Analysis of Semi Rigid Connections in Steel Frames
Analysis of Imperfections
Stability of Structures
Practical Advanced Analysis Methods
Performance Based Analysis of Structures
3. 3 Background and Expertise on WG3/WP9
Özgür BOZDAG, M.Sc. (TR)
M.Sc. Thesis: Dynamic Analysis of Retaining Structures
Ph.D. Thesis (On going study): Energy Based Performance Anaysis of Structures
Performance Based Analysis of RC Structures
Earthquake Engineering and Structural Dynamics
Soil Structure Interaction
Rehabiliation of Masonry Structures
4. 4 Ongoing research activity at the national level on the topic of WG3
Sustainability of Constructions
The Aim of the Study is:
Investigation of The New Constructions Built in Historic Centers
(In The Meaning of Sustainability of The Characteristics of Present Urban Form)
5. 5 Special Interests in WP of the WG3:
WP9: Monitoring of life-cycle performance:
Maintenance, repair and rehabilitation techniques and planning;
Guidelines for the planning of Maintenance, Repair and Rehabilitation
Survey and condition assessment of structures (safety and functionality);
Guidelines survey and condition assessment of structures
6. 6 INTRODUCTION Our country is located on one of the most active earthquake areas on earth. Nearly 95% of Turkey is on very risky seismic zones. Therefore high-magnitude earthquakes commonly occur in Turkey. The structures suffer a very high amount of damage during these seismic activities and earthquakes cause widespread destruction.
Major seismic events during the past decade, such as those occurring in Turkey;
Erzincan, Turkey (1992)
Kocaeli, Turkey (1999)
Duzce, Turkey (1999)
Bingol, Turkey (2004)
have continued to demonstrate the destructive power of earthquakes, with destruction of engineered buildings, bridges, industrial and port facilities as well as giving rise to great economic losses.
7. 7 INTRODUCTION
As a result;
The need to improve seismic performance of the built environment through the development of performance-oriented procedures and guidelines has been recently highlighted.
8. 8 Performance Check of Structures How will a structure perform when subjected to a given level of earthquake?
Definition of structural performance
Definition of earthquake level
Determination of performance level
9. 9 Performance Check of Structures Recently released guidelines for Seismic Rehabilitation of Buildings:
FEMA 273, 356, 440 (ATC-55)
(Turkish Earthquake Resistant Design Code)
10. 10 Types of Performance Checks Methods for Obtaining Lateral Load Capacity of Structures:
Linear Static Analysis
Linear Dynamic Analysis
Nonlinear Static Analysis
Nonlinear Dynamic Analysis
11. 11 Why Do Pushover Analysis? Design Earthquakes cause nonlinear behavior
Better understand building behavior - Identify weak elements with plastic hinge formation and order. - Realistic prediction of element demands
Less conservative acceptance criteria can be used than linear analysis.
12. 12 Performance Check Using Pushover
13. CASE STUDY 1 PERFORMANCE ANALYSIS OF THE EXISTING RC MILITARY BUILDING
14. 14 Description of Building Number of Stories: 4
Strength of Concrete: 14.9 MPa
Beams: St-III (fy=420 MPa)
Columns: St-I (fy=220 MPa)
Soil Class: Z3 (according to TERDC)
Earthquake Zone: 1 (according to TERDC)
Earthquake Level: Strong Earthquake (Probability of exceedence in 50 years is greater than 10%)
Selected Performance Objective: Life Safety
15. 15 Computer Model of Structure
16. 16 Capacity Curve - Y Direction
17. 17 Determination of Earthquake Displacement Demand Using FEMA 356 Displacement Coefficient Method:
19. CASE STUDY 2 REHABILIATION OF HISTORICAL MASONRY MILITARY BUILDING
20. 20 DESCRIPTION OF BUILDING
21. 21 DYNAMIC MODEL OF STRUCTURE
22. 22 Performance of The Structure Shear capacity of each floor is not enough for resisting earthquake loads.
The Building is going to be retrofitted.
23. 23 Rehabilitation of The Structure Rehabilitation of structural walls
Rehabilitation of slabs
Rehabilitation of foundation
24. 24 Performance of The Structure After Rehabilitation Shear capacity of each floor is enough for resisting earthquake loads.
25. THANKS FOR YOUR PATIENCE...