Structures Hazard Mitigation and Bridge Design Process - کاهش خطرات ساختمان ها و پروسیجر دیزاین پل
Download as PPTX, PDF0 likes132 views
This document discusses hazard mitigation and bridge design processes. It begins by defining hazard mitigation as any action taken to reduce risks from natural hazards or future disaster losses. The key steps of hazard mitigation are identified as hazard identification, vulnerability analysis, defining a mitigation strategy, and implementing projects. Bridge design considerations are then outlined, including types of bridges according to structure, materials, span length, position, function, and support connection. The document concludes by describing forces acting on bridges like live load, dead load, impact load, and how to calculate loads from wind, water currents, buoyancy, thermal expansion, and seismic activity.
Structures Hazard Mitigation and Bridge Design Process - کاهش خطرات ساختمان ها و پروسیجر دیزاین پل
- 1. الرحیم الرحمن اهلل بسم Mamoon Aria Sahibi August 2017 STRUCTURES HAZARD MITIGATION AND BRIDGE DESIGN PROCESS
- 2. AIMS Hazard Mitigation Standards Bridge Loading Design Process E N G . M A M O O N A R I A S A H I B I
- 3. WHAT IS HAZARD MITIGATION? E N G . M A M O O N A R I A S A H I B I
- 4. HAZARD MITIGATION IS “ANY ACTION TAKEN TO REDUCE OR ELIMINATE THE LONG-TERM RISK TO HUMAN LIFE AND PROPERTY FROM NATURAL HAZARDS” OR ANY ACTION TAKEN TO REDUCE FUTURE DISASTER LOSSES E N G . M A M O O N A R I A S A H I B I
- 5. 1. HAZARD IDENTIFICATION 2. VULNERABILITY ANALYSIS 3. DEFINING A HAZARD MITIGATION STRATEGY 4. IMPLEMENTATION OF HAZARD MITIGATION ACTIVITIES AND PROJECTS The essential steps of Hazard Mitigation are: E N G . M A M O O N A R I A S A H I B I
- 6. HAZARD MITIGATION STRUCTURES E N G . M A M O O N A R I A S A H I B I
- 7. WHAT IS STRUCTURE DESIGN? E N G . M A M O O N A R I A S A H I B I
- 8. WHAT IS CODE AND METHOD? E N G . M A M O O N A R I A S A H I B I
- 9. HYDRO METEOROLOGICAL STRUCTURE DESIGN E N G . M A M O O N A R I A S A H I B I
- 10. BRIDGE DESIGN E N G . M A M O O N A R I A S A H I B I
- 11. COMPONENTS OF BRIDGES • Super Structure • Sub Structure E N G . M A M O O N A R I A S A H I B I
- 12. 1 According to Super Structure Type Slab Bridge Girder Bridge Truss Bridge Suspension Bridge Cable Stayed Bridge TYPES OF BRIDGES E N G . M A M O O N A R I A S A H I B I
- 13. TYPES OF BRIDGES 2 According to Materials • Timber Bridges • R.C.C. Bridges • P.C.C. Bridges • Stone or Brick Bridges • Aluminum Bridges • Cable Bridges (Suspension Bridges) E N G . M A M O O N A R I A S A H I B I
- 14. TYPES OF BRIDGES 3 According to Span Length • Culvert S ≤ 6m • Minor Bridge 6 < S < 60 • Major Bridge 60 < S < 120 • Long Span More than 120 E N G . M A M O O N A R I A S A H I B I
- 15. TYPES OF BRIDGES 4 According to Super Structure Position Deck Bridge Trough Bridge Semi Trough Bridge E N G . M A M O O N A R I A S A H I B I
- 16. TYPES OF BRIDGES 5 According to Super Structure Function Roadway Bridges Railway Bridges Pedestrian Bridges Aqueduct Viaduct E N G . M A M O O N A R I A S A H I B I
- 17. TYPES OF BRIDGES 6 According to Support Connection Simply Supported Cantilever Continuous E N G . M A M O O N A R I A S A H I B I
- 18. Forces Acting on Bridge Live Load Dead Load Impact Load Water Current Load Wind Load Earthquake Load Buoyancy Load Centrifugal Force Thermal Force Siesmic Force E N G . M A M O O N A R I A S A H I B I
- 19. HL-93 Loading from AASHTO LRFD Bridge design specification Live Load E N G . M A M O O N A R I A S A H I B I
- 20. Due to self weight or any other load which lay on the structure Dead Load E N G . M A M O O N A R I A S A H I B I
- 21. 𝐼 = 𝐴 𝐵 + 𝐿 Impact Load 𝐴 = 4.5 𝑓𝑜𝑟 𝑅. 𝐶. 𝐶. A= 9 For Steel 𝐵 = 6 𝑓𝑜𝑟 𝑅. 𝐶. 𝐶. B= 13.5 for steel 𝐿 = 𝑠𝑝𝑎𝑛 𝐼 ≤ 0.3 E N G . M A M O O N A R I A S A H I B I
- 22. P = 𝐾 𝑑 ρ 𝐴 𝑉2 2 Wind Load 𝐾 𝑑 - Drag Coeffecient ≤ 1.5 ρ = 35 𝑙𝑏 𝑓𝑡3 (555.8 𝐾𝑔 𝑚3) A= 𝑆𝑢𝑟𝑓𝑎𝑐𝑒 𝑜𝑓 𝑆𝑡𝑟. 𝑀𝑒𝑚. V = Wind Speed E N G . M A M O O N A R I A S A H I B I
- 23. P = 𝐾 ρ 𝑉2 2 Water Current Load 𝐾 = 1.5 Square and rectangular pier 𝐾 = 0.66 Circular Pier 𝐾 = 0.9 Triangular Pier 𝑉 = 𝑊𝑎𝑡𝑒𝑟 𝑆𝑝𝑒𝑒𝑑 ρ Volume weight of water E N G . M A M O O N A R I A S A H I B I
- 24. P = 𝜌 𝑔 ℎ Buoyancy Load 𝜌 = Volume weight of Water 𝑔 = 𝐺𝑟𝑎𝑣𝑖𝑡𝑦 H = Depth of water E N G . M A M O O N A R I A S A H I B I
- 25. l = 𝑙0+ ∝ ∆𝑡 Thermal Force ∝ = Coffecient of expansion E N G . M A M O O N A R I A S A H I B I
- 26. Fe = w 𝑉2 127 𝑅 Centrifugal Force V = Design speed R – Radius of Curve 𝑤 = 𝐿𝑖𝑣𝑒 𝑙𝑜𝑎𝑑 E N G . M A M O O N A R I A S A H I B I
- 27. 𝐹𝐸 = ∝ ℎ 𝑤 Seismic Force ∝ ℎ = Seismic coefficient • Abutment • Pier • Beams E N G . M A M O O N A R I A S A H I B I
- 28. 𝑋 = ∝ ℎ 𝑤 𝑉2 2𝑔 ( 𝑙2 𝐶2 𝑙1 2 − 1) Afflux 𝑙 = 𝑆𝑡𝑟𝑒𝑎𝑚 𝑊𝑖𝑑𝑡ℎ 𝑎𝑡 𝐻. 𝐹. 𝐿. 𝑙1 = Effective Span C = Coefficient = 0.9 E N G . M A M O O N A R I A S A H I B I
- 29. 𝑆𝑙𝑎𝑏 Girder Diaphragm Abutment Pier Foundation Design Steps E N G . M A M O O N A R I A S A H I B I
- 30. E N G . M A M O O N A R I A S A H I B I
- 31. E N G . M A M O O N A R I A S A H I B I