When checking seismic design for shear walls, engineers often rely on pre-defined PMM interaction curves. But with today’s tools, we can...

In structural engineering, understanding the role of second-order effects, particularly P-Delta (∆) moments, is crucial for designing...

When it comes to seismic analysis of buildings, one question often gets overlooked: “Should I include the basement in my seismic model?”...

In development plan to be completed in Q2/2025

In seismic design, we focus heavily on member strength and ductile detailing — but often overlook the quiet power of redundancy . ASCE 7...

In modern structural design, achieving both safety and efficiency requires more than just calculating forces and designing members—it...

1. Overview This summary compares different types of post-installed concrete anchors, including adhesive, expansion, undercut, and...

Adisorn Owatsiriwong, D.Eng. alpsdev Introduction Concrete fasteners (anchors) are used to transfer loads between structural and...

Thailand's DPT 1301-50 (Standard for wind load calculation) and DPT 1302-61 (Standard for Seismic Design) are currently adopted for...

(please see attached file for matlab example)

Short-period buildings (Low rises) are typically subjected to higher base shear but smaller displacement and very low risk of the P-Delta...

In seismic design, one of the most commonly misunderstood topics is the fundamental period  of a building and how it affects base shear...

Eigen : "You're searching the entire modal domain , including irrelevant modes — torsion, out-of-plane wiggles, garbage local...

As post-tensioned and high-rise concrete designs grow more complex, structural misbehavior caused by gravity-only (leaning) columns...

Adisorn Owatsiriwong Tabulated Output for various parameters      fy       s       dia       sig3        sig1       sig1_fcp_ratio...

Adisorn Owatsiriwong 1. Spring Model Representation: • k_s : Represents the stiffness of the anchor. • k_c1 : Represents the...

Adisorn Owatsiriwong Understanding D-Regions 1. D-Region (Disturbed Region) : • The D-region is a portion of the structure where the...

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