Jimmy Haedir

Hybrid Construction | Composite Structures | FRP for Structural Strengthening | FRP in Construction | Structural Engineer | Opinions my own

[Jimmy Haedir @FRPstructures]

Hogging moment strengthening requires FRP to be applied directly to the top surface of the concrete slab.

#HoggingMoment #strengthening

[Horse Construction @Shhorse_HM]

How can Slabs in an Office Building be Reinforced to Accommodate Increased Loads?

CFRP

[Jimmy Haedir @FRPstructures]

FRP moves the needle.

[Northstar Technologies @Northstartgi]

Heavy steel. Massive logistics. High costs. Meet EXOSTRUCTURE by NTGI—a high-strength FRP composite up to 80% lighter than steel, with bolt-together assembly, no rust, and zero coating maintenance. Build smarter: https://t.co/01hgOUpYYk #EXOSTRUCTURE

[Jimmy Haedir @FRPstructures]

Tuhaihe bridge is China's first cable-stayed bridge to use CFRP cables. This study models the structure to evaluate a hybrid steel and CFRP cable configuration.

#CFRP #HybridCables #StructuralEngineering

[Materials MDPI @Materials_mdpi]

This study investigated a short-span cable-stayed bridge with steel–CFRP hybrid cables and found that using CFRP cables, especially in the long-cable region, improved stability, seismic performance, and displacement responses

https://t.co/9GmZiGgkkV
#MaterialsScience

[Jimmy Haedir @FRPstructures]

Combining different types of fibers can improve UHPC's tensile and flexural strength by 23% to over 150% compared with unreinforced UHPC.

[Applied Sciences MDPI @Applsci]

📢 #highlycited paper
📚 Influence of Hybrid Fibers on Workability, Mechanical and Dynamic Properties of Ultra-High Performance Concrete
🔗 https://t.co/2ccLZp8GyH
👨‍🔬 by Krystian Blaszczyk and Piotr Smarzewski
🏫 Military University of Technology
#ultrahighperformanceconcrete #hybridfiber #dynamicproperties

[Materials MDPI @Materials_mdpi]

This study investigated the dynamic mechanical performance of post-fire concrete confined by CFRP sheets using SHPB tests and found that CFRP confinement and strain rate increased dynamic compressive strength by 1.8–3.6 times

https://t.co/nbbzAIoWwo

#MaterialsScience

[Jimmy Haedir @FRPstructures]

It's only a matter of time before one sees it.

[Fei-Fei Li @drfeifei]

Every one of my mathematician friend sees beauty in the numbers, shapes and the natural phenomena they work with. Who defines beauty in the age of machines?🤔

[Jimmy Haedir @FRPstructures]

Proof check, as always.

[Valerio Capraro @ValerioCapraro]

BREAKING: OpenAI’s solution to Navier–Stokes does not match its Lean verification.

The most important article to read today is not one of OpenAI’s 700 AI-generated math papers.

It is this other paper, making a deep and worrying point:

A Lean-verified proof does not automatically validate the proof written in natural language, nor does it mean that the formal statement captures the intended theorem.

During translation, an AI can change an assumption, weaken a statement, or replace the argument entirely.

It can hallucinate another theorem.

Lean correctly verifies the result.
But the proved result may no longer be what the paper claims.

This is a general problem. Things get spicy when the authors examine OpenAI’s proposed Navier–Stokes solution.

They identify at least two mismatches between the written intermediate results and their Lean counterparts:

One estimate claims that four additional input derivatives suffice. The Lean version requires five: a weaker result.

A pressure-flux estimate is obtained through a different bound, and proved through a different argument.

It is not clear whether these mismatches invalidate the entire proof.

But they raise an important issue.

OpenAI is flooding us with claimed revolutionary breakthroughs. Yet nobody knows whether the proofs are correct or whether they prove what they claim to be proving.

Epistemia at scale.

*
Paper in the first reply

[Jimmy Haedir @FRPstructures]

A broad range of results at once is notable.

[OpenAI @OpenAI]

We’re releasing a broad range of new mathematical results produced by an internal frontier model.

We’ve been consulting with the independent Advisory Group on Mathematics and Artificial Intelligence at the Institute for Advanced Study, and we have drawn on their advice and public recommendations to inform how we release these results.

https://t.co/7N6TPlft1P

[Jimmy Haedir @FRPstructures]

FRP featured.
Flexural Behavior of Concrete Beams Reinforced with Glass Fiber-Reinforced Polymer Bars Preconditioned in Marine Environments

“...a promising alternative to traditional steel reinforcement due to their superior corrosion resistance and light weight”

#ACI

[AmericanConcreteInst @ConcreteACI]

The September 2026 issue of the ACI Structural Journal is now available!🌟 Information published in the ACI Structural Journal includes: structural design, analysis of concrete elements and structures, research related to concrete elements and structures, and papers addressing design and analysis theory. *Free to ACI Members.*

Papers include:

● Consideration of Stress-Strain Curve in Concrete Creep Theories;
● Drift Capacity of Reinforced Concrete Columns Strengthened with Post-Tensioned External Clamps;
● Splice Strengths of Widely Spaced Noncontact Splices;
● Dynamic Wind Response Analyses of Tall Concrete Core Wall Buildings;
● Flexural Behavior of Concrete Beams Reinforced with Glass Fiber-Reinforced Polymer Bars Preconditioned in Marine Environments; and
● 17 additional topics/papers!

➡️ Download the Full Issue Here: https://t.co/Wl3Kf4Z5rv

[Jimmy Haedir @FRPstructures]

Durable FRP solutions supporting marine research

[Strongwell @strongwellmc]

Strongwell FRP is supporting coral reef research at Biosphere 2! 🌊 EXTREN®, DURAGRID® and SAFRAIL™ were used to create a durable structure supporting nearly 300 lights above the Marine Mesocosm.

https://t.co/L8uXSccFko

[Jimmy Haedir @FRPstructures]

Strengthening what already exists with CFRP

[Concrete Masonry Restoration @ConcreteMasonr1]

CMR offers advanced Structural Carbon Fiber Reinforcing (CFRP) to restore and significantly upgrade the load-bearing capabilities of existing concrete, masonry, and steel elements.

#StructuralEngineering #CarbonFiberReinforcement #ConcreteRestoration #CommercialRealEstate

[AmericanConcreteInst @ConcreteACI]

The October 2026 issue of Concrete International magazine is now available!🌟 Concrete International is the magazine of the concrete community, published monthly by ACI. *Free to ACI Members.

This issue of CI Includes:

• Free Preview Article: Notable Concrete in Atlanta;
• Linking service durability to resilience and sustainability through defined service life and lessons learned advocacy;
• Saline Water Concrete: Corrosion Protection Strategy for Production Plants;
• Environmental Product Declarations (EDPs) of Cement-Based Products: State of Practice and Path Forward – Technote (ACI PRC-130.1-25);
• Concrete Q&A: Sustainability and Resilience;
• Awards at the ACI Concrete Convention – Fall 2026; and more!

➡️ Download the Full Issue Here: https://t.co/0vfEO775fS

[Jimmy Haedir @FRPstructures]

FRP systems can arrive engineered and ready for installation, requiring less cutting and reducing waste on site.

[Northstar Technologies @Northstartgi]

Up to 30% of building materials delivered to job sites end up in landfills. Northstar Technologies' precision-engineered FRP systems arrive ready to assemble, cutting waste, reducing deliveries, speeding builds, and supporting ESG goals. Build faster. Waste less.

[Jimmy Haedir @FRPstructures]

Tailored CFRP design

[Horse Construction @Shhorse_HM]

Strengthening Reinforced Concrete Beams with Web Openings using HM-30 Unidirectional Carbon Fiber Reinforced Polymer (CFRP)

[Jimmy Haedir @FRPstructures]

There's room for FRP to move.

[Northstar Technologies @Northstartgi]

Reduce structural dead load with Northstar TGI’s Gen 8 FRP panels. High strength-to-weight performance can simplify site logistics, reduce crane requirements, and support projects with poor soils or tight access.
https://t.co/AVAvjs2P8C
#FRP #Construction

[Jimmy Haedir @FRPstructures]

FRP. Demonstrably better.

[Pile Buck Magazine @buckmag]

The Margate Marina in New Jersey had an old and deteriorating seawall. Marine Construction Supply provided materials to upgrade the marina with 1,200 linear feet of new bulkhead. The bulkhead was constructed using FRP (fiberglass) sheet pile and wales. The upgrade restored the marina’s structure and improved its safety. Call 770-363-6745 to learn more about how Marine Construction Supply can support your next project.

[Massachusetts Institute of Technology (MIT) @MIT]

Did you know the original Claude — the chatbot’s namesake, according to Anthropic lore — was a renowned MIT professor? Claude Shannon SM ’40, PhD ’40, who taught at MIT from 1956 until his retirement in 1978, was known to many as the father of information theory and of modern digital communications.

[Jimmy Haedir @FRPstructures]

https://t.co/Y5vfNmtKGd

[Northstar Technologies @Northstartgi]

Build for the entire lifecycle—not just day one. Advanced composite framing cuts embodied carbon with corrosion-free durability, up to 70% less weight than steel, and reduced thermal bridging. Discover sustainable framing with Northstar Technologies: https://t.co/NdTfsugI06

[Jimmy Haedir @FRPstructures]

The developed corrosion-resistant CFRP tendon-anchorage system has the potential for use in prestressed concrete and cable-supported structures.

[Fibers_MDPI @JFibers]

📣 Welcome to read the paper in Fibers:
📑 A Study on the Long-Term Performance Evaluation of Carbon-Fiber Reinforced Polymer (CFRP) Tendon
👩‍🔬 Authors: Jongeok Lee, Sung-Jin Lee and Woo-Tai Jung
📌 https://t.co/ZEwCxp53Oq

#fibers #CFRP
@MDPIOpenAccess
@ChemMatSci_MDPI

[OpenAI @OpenAI]

We’re working with an independent advisory group of mathematicians to help OpenAI responsibly share advances in AI and mathematics.

The group will advise on how we assess and communicate new mathematical results, uphold academic and professional standards, and build tools that support mathematical research and learning.

Through this work, we want mathematicians to be at the center of shaping how AI supports mathematical understanding and how its benefits reach the wider community.

https://t.co/QCMFLFlIv8