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Why 'Geometric Stiffness' Is a Misnomer
In the field of nonlinear structural analysis, the term 'geometric stiffness' has long been used to describe the additional terms that...
Adisorn O.
May 122 min read
Geometric Nonlinear Truss using Updated Lagrangian (UL) – MATLAB Implementation
Inclined 2-Bar Truss with Geometric Nonlinearity and Transformation Matrix This example models a 2-bar inclined truss using the Updated...
Adisorn O.
May 124 min read
Phase 1 Workbook: Nonlinear Truss Element using Newton-Raphson (with MATLAB)
This workbook builds a nonlinear axial truss model using the Newton-Raphson method and a bilinear elastic-plastic material model. It...
Adisorn O.
May 122 min read
Two-Stage Seismic Analysis for Tall Buildings with Podium or Basement
In the seismic design of tall buildings with podiums or basements, the structure typically consists of a flexible tower built over a...
Adisorn O.
May 123 min read
Topographic Factor (Ct) in NBCC 2015/2020
In the National Building Code of Canada (NBCC) 2015 and 2020, the topographic factor (denoted as Ct) adjusts wind pressure to account for...
Adisorn O.
May 122 min read
Comparison of Wind Load Design: ASCE 7-16 vs NBCC 2015/2020
Wind load design is a critical aspect of structural engineering, especially for buildings in urban environments where wind effects can...
Adisorn O.
May 123 min read
The Core Philosophy of ASCE 7 Seismic Design – A Capacity Design Perspective
Seismic design in ASCE 7 is fundamentally governed by the principles of capacity design. This approach ensures that structural systems...
Adisorn O.
May 112 min read
Do You Need to Multiply Vu by 3.0 for Pile Cap Design under Special Shear Wall?
Source: https://www.linkedin.com/posts/ahmed-abbass-m-sc-ph-d-663151145_learn-about-typical-failure-mechanisms-in-activity-72702927417948...
Adisorn O.
May 112 min read
Overstrength Factor (Ωo) : Which part of structure to apply?
In seismic design, the overstrength factor (Ωo) is a crucial component used to ensure a desired hierarchy of strength and failure...
Adisorn O.
May 115 min read
Using proper Drift Value in ASCE 7-16 Seismic Design
The table below summarizes the drift value used for different seismic design purposes. We have 2 drift values Elastic drift from reduced...
Adisorn O.
May 101 min read
Recommended Core Wall Thickness for Highrise Concrete Buildings (Flat plate)
The table below shows the common thickness of the core wall for SDC C. The suggested thickness is in the range of h/140-h/160, where h is...
Adisorn O.
May 101 min read
Diaphragm Design Calculation Sheet – Collector and Shear Checks As ACI318-19
by alpsconsult 1. Collector (Drag Strut) Design (with Ω₀ ) Given: - Axial force from ETABS (Fx) = 220 kN (tension) - Overstrength...
Adisorn O.
May 103 min read
Joint Shear Design (For SDC B and higher)
In all SMRF from SDC B, ACI requires to check the joint shear strength. It's sometimes overlooked and we could end up with the SMRF with...
Adisorn O.
May 81 min read
Overturning Stability of Foundation
A photo taken in Mandalay, Myanmar, after the M8.2 earthquake event. This emphasizes the importance of checking foundation stability. It...
Adisorn O.
May 41 min read
When to Include Special Seismic Load according to ASCE 7-16?
ASCE 7-16 §12.4.2.2 & §12.4.2.3 These sections define how vertical seismic effects (Ev) are added to load combinations. ✅ Summary:...
Adisorn O.
Apr 301 min read
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.
Apr 301 min read
🏗️ 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.
Apr 283 min read
CRSI's Pile cap Design Patterns
CRSI provides a guideline to optimize pile arrangement. We adopt this pattern in our PILE-OP software for the most efficient pilecap...
Adisorn O.
Apr 281 min read
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.
Apr 282 min read
🌟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.
Apr 273 min read
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