Saturday, June 4, 2016

Dynamic Analysis of Building using IBC 2000



I am tasked to conduct a training in the office about Dynamic Analysis of the building using the latest code. Having studied Structural Dynamics as one of the major subject in Masters course, I am confident I can explain them in front of graduate engineers.  Again, before making any presentation, I need to determine first the audience. I need to focus on the graduate engineers who has no prior knowledge on the theory of structural dynamics. Thus, I plan to present the topics in the following order:


  1. Explanation and Definition of Concepts - Structural Dynamics
  2. Single Degree of Freedom Systems as the Basis of Derivation of Response Spectra in NSCP(National Structural Code of the Philippines)
  3. Multiple Degrees of Freedom Systems with Manual Calculation to Explain How Software Computes the Period, Modes, and Base Shear of a structure.
  4. Hands on Modeling of 20 Storey Building in ETABS/STAAD to simulate dynamic analysis.
    1. Explanation of NSCP/IBC provisions while performing dynamic analysis
    2. Comparison of Equivalent Static Analysis Procedure and Dynamic Analysis Base Shear.
    3. Verification of Results using Softwares: ETABS/STAAD.
      • This portion will highlight the discrepancies on each softwares.
      • In short, a minor changes in structure stiffness and mass distribution in the building affects the software result through their manner of idealizing the model.
      • However, item no. 3 above or manual calculation will explain the importance of theory regardless of software you used.
      • Use of spreadsheet to verify software result and to minimize effort of manual calculation.
    4. Member Design from Dynamic Analysis Result using Spreadsheet in Accordance to NSCP/IBC provisions.
I believe this training will help my audience appreciate the structural dynamics further since it gave a direct application in design of high rise building. As of this writing, more advance theories on structural analysis like Performance Based Design are emerging. But, it is my personal advise for interested engineers to study in depth first Structural Dynamics prior to learning Performance Based Design!

There was a paper recently published about the termination of Response Spectrum Analysis. 

This training surely highlight one of the reasons why they said so.



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