The pioneering leader in the development of software tools for structural and earthquake engineering, Computers and Structures, Inc (CSI) will conduct its first Performance-based Design (PDB) seminar in the region, “Theory and Practice of Performance-based Design: The Future of Earthquake Engineering,” at the Sofitel Bangkok Sukhumvit, Thailand on 7 August 2014.

CSI, in collaboration with its regional partner the Asian Center for Engineering Computations and Software (ACECOMS), Asian Institute of Technology (AIT), brings to the region the biggest and most comprehensive PBD seminar. ACECOMS at AIT is actively involved in the regionalization, regional promotion and support of high-quality professional software such as SAP2000, ETABS, SAFE, and CSICol from Computers and Structures Inc.

In this technology-packed seminar, keynote speaker Ashraf Habibullah, CSI Founder, President and CEO will present the theory and practical application of nonlinear analysis and performance-based design in terms and analogies that are very familiar to the practicing structural engineer. The seminar will address many fundamental questions, such as:

  • Why do we 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?
This seminar has been previously held in San Francisco, New York City, and Los Angeles, and is now being organized in Bangkok for the benefit of the construction industry and engineering professionals in this region.

CSI and AIT invite all engineers, architects, and executives and managers in building industry and public infrastructure to attend this premier event.

The seminar will cover topics related to:

Nonlinear Theory,
Nonlinear Modeling,
Nonlinear Analysis Techniques,
and discuss Nonlinear Applications in Structural Engineering.

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 deformation 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

About Ashraf Habibullah, S.E.

Ashraf Habibullah, Registered Civil and Structural Engineer, is President and CEO of Computers and Structures, Inc. Ashraf graduated from the University of California at Berkeley in 1970 with a master’s degree in structural engineering. He founded CSI in 1975. Today, CSI is recognized globally as the pioneering leader in the development of software tools for structural and earthquake engineering. The software is used by thousands of engineering firms in over 160 countries for the design of major projects, including the One World Trade Center in New York, the Burj-e-Khalifa in Dubai, the 2008 Olympics “Bird’s Nest” Stadium in Beijing and the Centenario Bridge over the Panama Canal. CSI products are also recognized as the standard tools for research and education worldwide and CSI has donated software to thousands of universities for teaching purposes. Through these donations, CSI has helped to ensure that the technology necessary to produce seismically-sound structures is available throughout the world. Ashraf has led the development of CSI’s products for nearly four decades.