التصميم و البناء في الهندسة المدنية Performance Based Design by CSI

The seminar will address many fundamental questions, such as:

• Why do we even need to talk about nonlinear analysis?
  
• What is really meant by energy dissipation and why it is important?
  
• What is a time-energy diagram and why is it so important in seismic design?
  
• What is deformation capacity and why it is more important than strength capacity?
  
• What we really mean by ductility and why strength without ductility is useless?
  
• What is a material model, a fiber model and a hysteresis loop?
  

And, elaborate on many interesting observations, for example:

• ... that structures can be designed to follow predefined paths of damage to preserve critical components.
  
• ... that allowing yielding of parts of a structure during an earthquake can save the rest of the structure.
  
• ... that yielding does not mean failure and some structures can have more strength after yielding.
  
• ... that the most efficient and accurate nonlinear time history analysis technique is based on mode superposition.
  
• ... that most dead load analyses assume that a structure is built weightless and gravity appears instantaneously.
  
• ... that a nonlinear time history analysis is important even for a regular high rise structure.
  

Nonlinear Theory

• Material and geometric nonlinearity
  
• Steel and Concrete behavior in the nonlinear range
  
• P-delta and large displacements
  
• Yielding and energy dissipation
  
• History dependence
  
• Ductile and brittle behavior
  
• Ductile limit and strength loss
  
• Elastic and plastic energy
  
• Cyclic stiffness and strength degradation, and fatigue
  
• Hysteresis loops and time-energy diagrams
  

• Redundancy and resilience
  
• Strength based design and deformation based design
  
• Problems of design by analysis
  
• Capacity design and sacrificial elements
  
• Collapse mechanisms
  
• Sustained and cyclic loads
  

Nonlinear Modeling

• Material models, moment, axial and shear hinges FEMA hinges
  
• Rusty hinge model
  
• Moment axial force interaction
  
• Fiber hinge models for complex shapes
  
• Multi layered nonlinear shell model
  
• Multi linear elastic and plastic behavior
  
• Viscous dampers
  
• Base isolation energy dissipating models
  
• Types of hysteresis loops - kinetic, isotropic, Takeda and pivot
  
• Special considerations for tall building
  

Nonlinear Analysis Techniques & Performance Based Design

• The FNA time history analysis method and the power of Ritz vectors
  
• Step by step nonlinear time history analysis
  
• Large-displacement and P-delta effects
  
• Modal and Rayleigh damping
  
• Nonlinear events and element state determination
  
• Unloading events, redistribution and solution complications
  
• Requirements of ASCE41Pushover analysis and limitations
  
• Force controlled loading and displacement controlled loading
  
• Badly behaved displacements (snap-back and snap-through)
  
• Non-uniqueness of static solutions, uniqueness of dynamics
  
• Acceleration Displacement Response Spectrum (ADRS)
  
• Push over curve and target displacement Equivalent linearization and displacement modification methods
  
• Performance measures and performance levels
  
• Demand/capacity ratio and acceptance criteria
  
• Soil-structure interaction
  

Nonlinear Applications in Structural Engineering

• Buckling restrained braces
  
• Eccentrically braced systems
  
• Base isolation systems
  
• Reduced beam sections
  
• Panel zone plasticity
  
• Foundation uplift and structural pounding
  
• Long term creep and shrinkage
  
• Effects of construction sequence loading
  
• Nonlinear dampers and deflection control
  
• Tension only bracing systems
  
• Cable supported structures
  

 

Performance Based Design [PDF+PowerPoint Presentation]
http://www.mediafire.com/download/55...ghujkhgyuy.rar

Performance Based Design [Video Lecture, Some Highlights]
http://www.mediafire.com/download/qc...klnk.part1.rar
http://www.mediafire.com/download/bb...klnk.part2.rar