GFRC Facade Panel Attachment for Thermal and Seismic Movement

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Solution Overview

Problem

Current facade systems using Glass Fiber Reinforced Concrete (GFRC) panels face issues with differential movement between panels and the concrete frame, leading to cracking and chipping, due to shrinkage, creep, thermal expansion, and seismic loads, which are not adequately addressed by existing attachment systems.

Innovation Solution

A versatile panel system incorporating a glass fiber reinforced concrete coating with a water/vapor ventilation system and a unique fastening mechanism that allows for thermal expansion, wind resistance, and seismic load management, featuring a layered structure with a fiberglass grid reinforcement and alkaline-resistant hurricane-tested scrim mesh, along with a fire-resistant foam layer and epoxy adhesive for secure attachment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stability of the object's composition

If rigid attachment systems are used to secure GFRC panels to concrete frames, then structural stability is improved, but differential movement causes cracking and chipping of panels

Engineering Contradiction:

Improvestructural stabilityVSAvoidpanel integrity

Core Design Contradiction:

Stability of the object's compositionVSReliability

Solution Approach 1:

The patent employs flexible attachment systems including rubber grommets, elastomeric materials, and flexible connectors that can deform and accommodate differential movement between the concrete frame and GFRC panels. These flexible elements absorb thermal expansion, shrinkage, and seismic movements while maintaining secure panel attachment, preventing cracking and chipping that would occur with rigid fastening systems.

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The attachment system is designed to be dynamic rather than static, allowing for movement and adjustment in response to environmental conditions. The system includes expandable connectors, adjustable fasteners, and flexible mounting mechanisms that adapt to changing dimensions of the concrete frame and panels, maintaining structural stability while accommodating differential movement throughout the building lifecycle.

Inventive Principle:

Principle #15Dynamics

2Strength

If heavy natural stone slabs are installed using mortar and grout, then structural strength is improved, but installation requires significant manpower and specialized skills

Engineering Contradiction:

Improvestructural strengthVSAvoidinstallation simplicity

Core Design Contradiction:

StrengthVSEase of operation

Solution Approach 1:

The attachment system divides the heavy panel installation into manageable segments using individual anchors, spacers, and fastening components that can be installed separately. This modular approach allows workers to attach panels systematically without requiring large crews to handle the entire panel at once, reducing manpower requirements while maintaining structural strength through distributed attachment points.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces intermediary components such as metal anchors embedded in the concrete frame, rubber grommets, and adjustable connectors that mediate between the heavy stone panels and the building structure. These intermediaries bear the weight and attachment forces, allowing standard construction workers to install panels without requiring specialized skills for handling extremely heavy materials directly.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Reliability

If panels are designed to accommodate thermal expansion and shrinkage, then panel durability is improved, but attachment system complexity increases

Engineering Contradiction:

Improvepanel durabilityVSAvoidattachment system complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The attachment system incorporates cushioning elements such as rubber grommets, elastomeric materials, and compressible spacers installed in advance to absorb and accommodate thermal expansion, shrinkage, and seismic movements. These pre-installed flexible elements provide a buffer that protects panels from stress-induced cracking while maintaining a relatively simple overall attachment structure that doesn't require complex adjustment mechanisms.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The system provides a flexible, durable, and aesthetically pleasing solution that accommodates volumetric changes, resists skin bending stresses, and maintains structural integrity under varying environmental conditions, ensuring the panels remain secure and functional.

Implementation Method 1

a water/vapor ventilation system lodged between the GFRC and insulation allowing both surrounding layers to expand and contract. The system provides a water way for any ambient water retention and vapor retention allowing water vapor to exit through the upper portion and water to weep through the bottom.

Methodology Applied

Scientific EffectVapor pressure: Vapour Pressure

Implementation Method 2

Methodology Applied

Scientific EffectAdhesion: Adhesive

Data Source

PatentUS9970192B2Multifunctional panel system and attachment means

Publication Date: 2018.05.15 BAY DESIGN INC

AI summary

The instant system is a panel made of several layers that is a highly decorative, fire resistant, water resistant, sound proof, R valued insulated, light weight, and energy efficient panel. Such layers include: glass fiber reinforced concrete, glass fiber reinforced concrete with alkaline resistant fibers, alkaline resistant hurricane tested scrim mesh, a solar powered radiant tubing, a fire resistant foam that contains a steel reinforcement, and an epoxy adhesive.