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Is it allowed to use concrete pile without dowel bars in SDC C?
❌ No . According to ACI 318-14 (ASCE 7-10), we need to extend at least pc strand from concrete pile into pilecap. For using pc strand...
Adisorn O.
2 days ago1 min read
4 views


🏗️ Understanding Axial Force Restraint in Post-Tensioned Slabs: A Practical FEM-Based Approach for Ground Floor Analysis
Introduction In post-tensioned (PT) concrete slab design, one subtle yet critical phenomenon is the axial restraint that develops at the...
Adisorn O.
3 days ago3 min read
2 views


Building a Local Coordinate Transformation Matrix in 3D Using MATLAB
by alpsdev When working with 3D structural elements such as beams, frames, or trusses, it is often necessary to define a local coordinate...
Adisorn O.
4 days ago2 min read
5 views


🌟Formulation for 3D Truss Element Transformation — With MATLAB Code
by alpsdev, 2025 When working with 3D truss structures , the transformation between local and global coordinates becomes crucial....
Adisorn O.
4 days ago3 min read
3 views
![🌟 Building 3D Frame Element Transformation Matrix [T] — Step-by-Step Tutorial with MATLAB Code](https://static.wixstatic.com/media/5ca1ad_bcc47caa3e824fdfa0481380a3f5b0c3~mv2.png/v1/fill/w_333,h_250,fp_0.50_0.50,q_35,blur_30,enc_avif,quality_auto/5ca1ad_bcc47caa3e824fdfa0481380a3f5b0c3~mv2.webp)
![🌟 Building 3D Frame Element Transformation Matrix [T] — Step-by-Step Tutorial with MATLAB Code](https://static.wixstatic.com/media/5ca1ad_bcc47caa3e824fdfa0481380a3f5b0c3~mv2.png/v1/fill/w_454,h_341,fp_0.50_0.50,q_95,enc_avif,quality_auto/5ca1ad_bcc47caa3e824fdfa0481380a3f5b0c3~mv2.webp)
🌟 Building 3D Frame Element Transformation Matrix [T] — Step-by-Step Tutorial with MATLAB Code
In structural engineering, when analyzing 3D frames, it’s critical to correctly transform the local stiffness matrix of each element into...
Adisorn O.
4 days ago3 min read
6 views


Choosing Shear Wall Thickness: h/25 vs h/16 — What Should We Follow?
In seismic design, setting the right shear wall thickness is far more important than just passing code checks. It’s about ensuring...
Adisorn O.
5 days ago2 min read
7 views
🏗️ Caution in Bearing Load Transfer: Why Pilecap Concrete f'c Should Not Be Too Low Compared to Column f'c
📖 Introduction In structural foundation design, particularly for pile caps receiving high axial loads from columns , the transfer of...
Adisorn O.
5 days ago3 min read
3 views


🏗️ Foundation Bearing Check: Why You Should Never Place a Column at the Edge of a Pile Cap
📖 Introduction In foundation design, particularly for pile caps and spread footings , verifying the bearing stress at the...
Adisorn O.
5 days ago3 min read
5 views


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🚀 Breaking Ground with SEISMIC-PILE: Our Custom FEM Tool for Lateral Pile Analysis
By alpsdev 2025 🔧 Key Features Implemented: ✅ FEM-Based Beam Modeling True 2D beam elements with 2 DOFs per node Supports bending...
Adisorn O.
Apr 241 min read
8 views


🏗️ Understanding Pushover Analysis and Capacity Spectrum Method (CSM)
by alpsdev · April 2025 🔎 What is Pushover Analysis? Pushover analysis is a nonlinear static method used to evaluate structural...
Adisorn O.
Apr 242 min read
9 views


Adisorn O.
Apr 240 min read
6 views


🧠 From Theory to Practice: General FEM-Based Shear Distribution for Complex Shear Walls
Author: Adisorn Owatsiriwong, D. Eng. 🔍 Problem Statement In modern seismic design, shear walls are critical lateral force–resisting...
Adisorn O.
Apr 222 min read
9 views


🔍 Understanding the Response Modification Factor (R) and Overstrength Factor (Ω₀) in Seismic Design
In seismic design, engineers use a blend of structural capacity, ductility, and energy dissipation behavior to ensure life safety and...
Adisorn O.
Apr 222 min read
12 views


Key Considerations of Seismic Design: Stiffness, Strength, and Ductility
In the world of structural engineering, seismic design is not just about withstanding earthquakes — it’s about ensuring resilience,...
Adisorn O.
Apr 223 min read
12 views


🔄 Rotated Neutral Axis: A Smarter Way to Generate the PMM Surface
When checking seismic design for shear walls, engineers often rely on pre-defined PMM interaction curves. But with today’s tools, we can...
Adisorn O.
Apr 211 min read
3 views


🏗️ Understanding P–Delta Effects in ASCE 7-16 Seismic Design
In structural engineering, understanding the role of second-order effects, particularly P-Delta (∆) moments, is crucial for designing...
Adisorn O.
Apr 212 min read
11 views


🏗️ Why You Should Always Include the Basement in Seismic Modeling
When it comes to seismic analysis of buildings, one question often gets overlooked: “Should I include the basement in my seismic model?”...
Adisorn O.
Apr 194 min read
4 views


WALLCHECK—A Seismic design safety tool for shear wall buildings
In development plan to be completed in Q2/2025
Adisorn O.
Apr 191 min read
3 views


Redundancy Factor in ASCE 7: When One Wall Is Not Enough
In seismic design, we focus heavily on member strength and ductile detailing — but often overlook the quiet power of redundancy . ASCE 7...
Adisorn O.
Apr 192 min read
12 views
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