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Mass Participation Factor: Physical Meaning and Derivation
(please see attached file for matlab example)
Adisorn O.
Apr 161 min read
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The Trade-off in Seismic Periods
Short-period buildings (Low rises) are typically subjected to higher base shear but smaller displacement and very low risk of the P-Delta...
Adisorn O.
Apr 161 min read
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Understanding Seismic Period Limits in ASCE 7: Empirical vs. Analytical Periods
In seismic design, one of the most commonly misunderstood topics is the fundamental period  of a building and how it affects base shear...
Adisorn O.
Apr 162 min read
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Modal Analysis -- Ritz vs Eigen?
Eigen : "You're searching the entire modal domain , including irrelevant modes — torsion, out-of-plane wiggles, garbage local...
Adisorn O.
Apr 123 min read
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🚀 Introducing GravCol – A Smarter Way to Understand P-Delta Effects
As post-tensioned and high-rise concrete designs grow more complex, structural misbehavior caused by gravity-only (leaning) columns...
Adisorn O.
Apr 62 min read
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When to use the 'allocatable' keyword when declaring dynamic arrays in Fortran
It can confuse when to use allocatable keyword when declaring dynamic arrays. We have two scenarios to declare the array here First...
Adisorn O.
Mar 261 min read
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MOPSO: A Framework for Multi-objective Particle Swarm Optimization
Explanation of the Code Problem Definition Defines two conflicting objective functions  to minimize. Sets variable bounds (-5 to 5) ....
Adisorn O.
Mar 113 min read
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Case Example: Applying Naive Bayes for on-site Concrete Strength Classification
Adisorn Owatsiriwong Introduction In structural engineering, accurately determining the compressive strength of concrete is crucial for...
Adisorn O.
Sep 3, 20242 min read
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How to apply Bayes Theorem to real-life problems with Examples
1. Explanation Bayes Theorem: To find the probability of event B, given A occurs P(D|T) = P(T|D)*P(D)/P(T) * One may think that T is a...
Adisorn O.
Sep 3, 20242 min read
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Evaluating Bearing Strength of Concrete by using M-C Criterion
Adisorn Owatsiriwong Tabulated Output for various parameters     fy      s      dia      sig3       sig1      sig1_fcp_ratio...
Adisorn O.
Sep 3, 20241 min read
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Spring Model Presentation of Anchorage zone
Adisorn Owatsiriwong 1. Spring Model Representation: • k_s : Represents the stiffness of the anchor. • k_c1 : Represents the...
Adisorn O.
Aug 30, 20242 min read
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Causes of failure in Anchorage Zone of Post-tensioned Concrete
Adisorn Owatsiriwong Understanding D-Regions 1. D-Region (Disturbed Region) : • The D-region is a portion of the structure where the...
Adisorn O.
Aug 30, 20244 min read
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Analogy between Neural Network and Optimization Problems
Adisorn Owatsiriwong To fully understand the relationship between the neural network or deep learning and optimization problems, we can...
Adisorn O.
Aug 29, 20241 min read
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Naive Bayes Classifications
Adisorn Owatsiriwong, D.Eng. Introduction: Naive Bayes (NB) classification is a supervised Machine Learning (ML) technique used to...
Adisorn O.
Aug 28, 20243 min read
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Practical Approach in converting Serial to Parallel For Loop (parfor)
Adisorn Owatsiriwong Practical Approach: Converting a serial to parallel for loop must ensure each worker (cpu) handles an independent...
Adisorn O.
Aug 23, 20241 min read
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MATLAB's Parallel Computing Concept & Applications : Part 1 - Introduction
Adisorn Owatsiriwong Parallel programming in MATLAB enables us to perform multiple computations simultaneously by dividing tasks into...
Adisorn O.
Aug 12, 20242 min read
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Suppressing Vibrations in a 2DOF Mass-Spring System Using a Tuned Mass Damper: Part 1 -- Introduction
Adisorn Owatsiriwong, D.Eng. **Introduction** In many engineering applications, mechanical systems are subjected to dynamic loads that...
Adisorn O.
Aug 9, 20242 min read
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