Undercut Recess Anchoring Shear Force Elements in Concrete

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing methods for anchoring shear force elements in concrete buildings are cumbersome, particularly when adding parts like balconies, as they often require protruding reinforcement elements that hinder construction and create thermal bridges due to the need for thermal insulation.

Innovation Solution

A method involving a substantially horizontal recess with undercut areas and vertical filling and venting openings in the building part, allowing for the secure anchoring of shear force elements using a filling compound, which can be prefabricated and filled after the building part is created, ensuring no thermal bridges are formed.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If protruding reinforcement elements are used to connect building parts, then the structural connection strength is improved, but the ease of construction deteriorates due to hindrance of construction work and scaffolding erection

Engineering Contradiction:

Improvestructural connection strengthVSAvoidease of construction

Core Design Contradiction:

StrengthVSEase of operation

Solution Approach 1:

The recess with undercut areas is prepared in advance during formwork assembly before concrete pouring. This preliminary preparation allows the reinforcement element to be securely anchored when inserted later, providing strong structural connection without requiring protruding elements during construction work.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

Instead of inserting protruding reinforcement elements into the building part, the invention inverts the approach by creating a recess that receives the reinforcement element. The reinforcement element is inserted into the recess and anchored from the inside, eliminating protruding parts that hinder construction while maintaining connection strength.

Inventive Principle:

Principle #13The other way round (Inversion)

2Strength

If protruding reinforcement elements are used to connect building parts, then the structural connection strength is improved, but the device complexity increases due to the need for thermal insulation measures

Engineering Contradiction:

Improvestructural connection strengthVSAvoiddevice complexity

Core Design Contradiction:

StrengthVSDevice complexity

Solution Approach 1:

The harmful protruding parts are extracted from the system by using a recess-based anchoring solution. The reinforcement element is fully contained within the building part, eliminating the need for additional thermal insulation measures around protruding elements and reducing overall system complexity.

Inventive Principle:

Principle #2Taking out (Extraction)

3Reliability

If a recess body is embedded in the building part, then the anchoring capability is improved, but the productivity decreases due to additional steps in the construction process

Engineering Contradiction:

Improveanchoring capabilityVSAvoidproductivity

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The recess creation step is merged with the formwork assembly process. The recess body is integrated into the formwork structure, so that preparing the anchoring recess and assembling the formwork occur simultaneously, eliminating separate operations and maintaining construction productivity.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The recess body serves multiple functions: it forms the anchoring recess, acts as part of the formwork structure, and provides a template for the reinforcement element placement. This multi-functionality reduces the number of separate components and steps required, maintaining productivity while ensuring reliable anchoring.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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

This method provides a secure, form-fitting anchoring solution that absorbs large shear forces, suitable for attaching elevated balconies, while avoiding thermal bridges by using insulating materials and ensuring complete filling of the cavity through the venting openings.

Implementation Method 1

the recess is filled with a filling compound, in particular special grouting mortar or concrete, via at least one of the filling and ventilation openings

Methodology Applied

Scientific EffectGravity: Gravitation

Implementation Method 2

The cavity of the recess that remains around the shear force element is completely filled in the process

Methodology Applied

Scientific EffectPressure gradient: Pressure Gradient

Data Source

PatentEP2865821B1Method for anchoring a transverse force element on a building part

Publication Date: 2017.03.01 SCHOECK BAUTEILE GMBH

AI summary

The invention relates to a method for anchoring a shear force element for connecting building parts to a building part to be constructed from concrete, in particular a floor slab, which is characterized in that, during the construction of the building part, a substantially horizontal recess with undercuts is provided in the building part by arranging a corresponding recess body in a formwork for the building part, that the recess is provided with at least two substantially vertical filling and venting openings spaced apart from each other, and that the shear force element is inserted into the recess after the construction of the building part and the recess is filled with a grout via at least one of the filling and venting openings.